CN110311561A - A kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC - Google Patents
A kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC Download PDFInfo
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- CN110311561A CN110311561A CN201910540424.XA CN201910540424A CN110311561A CN 110311561 A CN110311561 A CN 110311561A CN 201910540424 A CN201910540424 A CN 201910540424A CN 110311561 A CN110311561 A CN 110311561A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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Abstract
The present invention relates to technical field of integrated circuits, specifically disclose a kind of LDO power supply system of wide input voltage low-power consumption based on BOOST type DCDC, including power supply module, current mirror, pull-down circuit, feed circuit and the first field-effect tube PM0；One end of the feed circuit connects current mirror, the other end of feed circuit connects power supply VCC, the other end of the current mirror is separately connected the source electrode and grid of pull-down circuit, the first field-effect tube PM0, the source electrode of the first field-effect tube PM0 connects power supply module, and the drain electrode of the first field-effect tube PM0 connects feed circuit；Power supply of the power supply module provided by the invention as LDO power supply system, pull-down circuit opens PM0 pipe, power supply VCC realizes stable chip interior supply voltage by feed circuit, the not additional start-up circuit of the present invention, biasing circuit and operational amplifier, have the characteristics that low in energy consumption and with high accuracy, can be realized the function that LDO system stabilizes the output voltage.
Description
Technical field
The present invention relates to technical field of integrated circuits more particularly to a kind of wide input voltage based on BOOST type DCDC are low
The LDO power supply system of power consumption.
Background technique
With the fast development and extensive use of movable equipment, applied to the power IC on movable equipment
Enter research boom.
In the prior art, the patent of invention of Publication No. CN2016107947660 discloses a kind of based on load supplying
Booster power LDO power supply system, when starting power up, chip is powered system by VIN, and start-up circuit provides inclined to inn1
Voltage is set, bias current provides biasing to operational amplifier, and operational amplifier chooses inn1 and makes comparisons with inp, other modules are also
It is inactive, it is short by the void of operational amplifier it is found that generating stable VDD1；After VDD1 stablizes, start other modules, then
Chip output VOUT slowly rises to setting value, and system is switched to VOUT and powers to chip, and amplifier is chosen inn2 and inp and made at this time
Compare, generates new stablizing and export VDD2.Disadvantage is that VIN passes through on field-effect tube PM1 when system electrification
The grid of field-effect tube PM2 is drawn, so that field-effect tube PM2 is turned off, vdd voltage 0V needs start-up circuit to provide to inn1 inclined
The grid for setting voltage drop-down field-effect tube PM2 opens field-effect tube PM2 and needs electric current inclined to wake up LDO power supply system
It holds module and provides biasing to operational amplifier, and start-up circuit is needed to wake up LDO power supply system, there are starting problems and standby
Power problems etc. influence the stability of power supply power supply.
Summary of the invention
In view of the above technical problems, the present invention provides a kind of wide input voltage low-power consumption based on BOOST type DCDC
LDO power supply system, not additional start-up circuit, biasing circuit and operational amplifier, have the characteristics that it is low in energy consumption and with high accuracy,
It can be realized the function that LDO system stabilizes the output voltage.
In order to solve the above technical problem, the present invention provides concrete scheme it is as follows:
A kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC, including power supply module, current mirror, under
Puller circuit, feed circuit and the first field-effect tube PM0；
One end of the feed circuit connects current mirror, and the other end of feed circuit connects power supply VCC, the current mirror it is another
End is separately connected the source electrode and grid of pull-down circuit, the first field-effect tube PM0, the source electrode connection of the first field-effect tube PM0
The drain electrode of power supply module, the first field-effect tube PM0 connects feed circuit.
Optionally, the LDO power supply system further includes clamp diode D3, one end of clamp diode D3 connection the
The grid of one field-effect tube PM0, the other end of clamp diode D3 connect the source electrode of the first field-effect tube PM0, clamp diode
D3 can prevent the grid oxygen of the first field-effect tube PM0 from puncturing.
Optionally, the LDO power supply system further includes zener diode D4, and the both ends of the zener diode D4 connect respectively
The both ends of feed circuit are connected to, zener diode D4 realizes that secondary pressure is protected from the breakdown of chip interior module.
Optionally, the power supply module includes diode D1 and diode D2, the diode D1 connection VIN, described two
Pole pipe D2 connection VOUT, selects VIN or VOUT as the power supply of LDO power supply system.
Optionally, the current mirror includes the second field-effect tube PM1, third field-effect tube PM2, the 4th field-effect tube NM1
With the 5th field-effect tube NM2；The grid of the second field-effect tube PM1 is connected together with the grid of third field-effect tube PM2
It is followed by the drain electrode to the 4th field-effect tube NM1；The source electrode of the second field-effect tube PM1 and the source electrode of third field-effect tube PM2
It connects together and is followed by power supply module；The drain electrode of the second field-effect tube PM1 connects the leakage of the 4th field-effect tube NM1
The drain electrode of pole, the third field-effect tube PM2 connects the pull-down circuit；The source electrode connection the of the 4th field-effect tube NM1
The source electrode of five field-effect tube NM2, the grid of the 4th field-effect tube NM1 connect the grid of the 5th field-effect tube NM2.
Optionally, the feed circuit includes the 5th field-effect tube NM2, the 6th field-effect tube NM3, the 7th field-effect tube
NM4, the 8th field-effect tube PM3 and the 9th field-effect tube PM4；The grid of the 5th field-effect tube NM2 and the common connection of drain electrode
The source electrode of 6th field-effect tube NM3, the 7th field-effect tube NM4 of grid and the common connection of drain electrode of the 6th field-effect tube NM3
Source electrode, the drain electrode of the 9th field-effect tube PM4 of the grid of the 7th field-effect tube NM4 and the common connection of drain electrode, the described 9th
The grid of field-effect tube PM4 connects the grid of the 7th field-effect tube NM4, and the grid of the 8th field-effect tube PM3 and drain electrode are altogether
With the source electrode of the 9th field-effect tube PM4 of connection, the source electrode of the 8th field-effect tube PM3 connects power supply VCC.
Optionally, the pull-down circuit includes the tenth field-effect tube NM5 and resistance R1, the tenth field-effect tube NM5's
One end of grid and the common connection resistance R1 of drain electrode, the other end of the resistance R1 and the source electrode difference of the tenth field-effect tube NM5
Connect current mirror.
Compared with prior art, it powers the beneficial effects of the present invention are: power supply module provided by the invention as LDO and is
The power supply of system, pull-down circuit open PM0 pipe, and power supply VCC realizes stable chip interior supply voltage, this hair by feed circuit
Bright not additional start-up circuit, biasing circuit and operational amplifier, have the characteristics that low in energy consumption and with high accuracy, can be realized
The function that LDO system stabilizes the output voltage.
Detailed description of the invention
Fig. 1 is the physical circuit connection figure of the LDO power supply system provided in the embodiment of the present invention.
Fig. 2 is that the LDO power supply system provided in the embodiment of the present invention applies chip interior block diagram in the chips.
Specific embodiment
For the technical solution that the present invention will be described in detail, below in conjunction with the attached drawing of the embodiment of the present invention, to of the invention real
The technical solution for applying example carries out clear, complete description.Obviously, described embodiment is a part of the embodiments of the present invention,
Instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are without creativeness
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of labour.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff it is identical.Term used herein is intended merely to description specific embodiment
Purpose, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more relevant listed items
Any and all combinations.
For example, a kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC, including power supply module,
Current mirror, pull-down circuit, feed circuit and the first field-effect tube PM0；One end of the feed circuit connects current mirror, feedback
The other end of circuit connects power supply VCC, and the other end of the current mirror is separately connected pull-down circuit, the first field-effect tube PM0
Source electrode and grid, the source electrode of the first field-effect tube PM0 connect power supply module, and the drain electrode connection of the first field-effect tube PM0 is anti-
Current feed circuit.
Power supply of the power supply module provided in this embodiment as LDO power supply system, pull-down circuit open PM0 pipe, power supply VCC
Stable chip interior supply voltage, the not additional start-up circuit of the present invention, biasing circuit and fortune are realized by feed circuit
Amplifier is calculated, has the characteristics that low in energy consumption and with high accuracy, can be realized the function that LDO system stabilizes the output voltage.
In some embodiments, as shown in Figure 1, providing a kind of wide input voltage low-power consumption based on BOOST type DCDC
LDO power supply system, including power supply module, current mirror, pull-down circuit, feed circuit and the first field-effect tube PM0；The feedback
One end of circuit connects current mirror, and the other end of feed circuit connects power supply VCC, and the other end of the current mirror is separately connected down
The source electrode and grid of puller circuit, the first field-effect tube PM0, the source electrode connection power supply module of the first field-effect tube PM0, first
The drain electrode of field-effect tube PM0 connects feed circuit.
Specifically, in this example, VIN or VOUT is chosen by power supply module and provides supply voltage for LDO power supply system,
Pull down resistor opens the first field-effect tube PM0 and wakes up LDO power supply system, and feed circuit detects VCC voltage, adjusted by current mirror
First field-effect tube PM0 conducting resistance stabilizes the output voltage VOUT, and structure is simple, not additional start-up circuit, biasing circuit
And operational amplifier, have the advantages that low in energy consumption and with high accuracy, meet power supply product design requirement, starting problem is not present
With the influence of the factors such as stand-by power consumption problem.
In some embodiments, the LDO power supply system further includes clamp diode D3, and the one of the clamp diode D3
The grid of the first field-effect tube PM0 of end connection, the other end of clamp diode D3 connect the source electrode of the first field-effect tube PM0, pincers
Position diode D3 can prevent the grid oxygen of the first field-effect tube PM0 from puncturing.
In some embodiments, the LDO power supply system further includes zener diode D4, and the two of the zener diode D4
End is connected to the both ends of feed circuit, and zener diode D4 realizes that secondary pressure is protected from the breakdown of chip interior module.
In some embodiments, the power supply module includes diode D1 and diode D2, the diode D1 connection
VIN, the diode D2 connection VOUT, selects VIN or VOUT as the power supply of LDO power supply system.
In some embodiments, the current mirror includes the second field-effect tube PM1, third field-effect tube PM2, the 4th effect
It should pipe NM1 and the 5th field-effect tube NM2；The grid of the second field-effect tube PM1 is connect with the grid of third field-effect tube PM2
To the drain electrode being followed by together to the 4th field-effect tube NM1；The source electrode and third field-effect tube PM2 of the second field-effect tube PM1
Source electrode connect together and be followed by power supply module；The drain electrode of the second field-effect tube PM1 connects the 4th field-effect tube
The drain electrode of the drain electrode of NM1, the third field-effect tube PM2 connects the pull-down circuit；The source electrode of the 4th field-effect tube NM1
The source electrode of the 5th field-effect tube NM2 is connected, the grid of the 4th field-effect tube NM1 connects the grid of the 5th field-effect tube NM2.
Feed circuit includes the 5th field-effect tube NM2, the 6th field-effect tube NM3, the 7th field-effect tube NM4, the 8th effect
It should pipe PM3 and the 9th field-effect tube PM4；The grid and drain electrode the 6th field-effect tube of common connection of the 5th field-effect tube NM2
The source electrode of NM3, the source electrode of the 7th field-effect tube NM4 of the grid of the 6th field-effect tube NM3 and the common connection of drain electrode, described the
The drain electrode of the 9th field-effect tube PM4 of grid and the common connection of drain electrode of seven field-effect tube NM4, the 9th field-effect tube PM4's
Grid connects the grid of the 7th field-effect tube NM4, the grid of the 8th field-effect tube PM3 and drain electrode the 9th effect of common connection
Should pipe PM4 source electrode, the source electrode of the 8th field-effect tube PM3 connects power supply VCC.
Pull-down circuit includes the tenth field-effect tube NM5 and resistance R1, and the grid of the tenth field-effect tube NM5 and drain electrode are altogether
With one end of connection resistance R1, the other end of the resistance R1 and the source electrode of the tenth field-effect tube NM5 are separately connected current mirror.
In some embodiments, as shown in Fig. 2, the LDO power supply system is applied in BOOST type DCDC chip interior, it is
Chip provides stable power supply VCC, external inductance L, built-in HS pipe composition BOOST type DCDC framework circuit, LDO power supply
System receives input voltage VIN and output voltage VO UT generates stable chip power supply VCC.LDO power supply system includes supplying
Electric module, pull-down circuit, clamp diode D3, zener diode D4, feed circuit and current mirror, power supply module select VIN
Or power supply of the VOUT as LDO power supply system, pull-down circuit open the first field-effect tube PM0, wake up LDO power supply system,
Clamp diode D3 prevents the grid oxygen of the first field-effect tube PM0 from puncturing, and VCC realizes that stable chip interior supplies by feed circuit
Piezoelectric voltage, zener diode D4 realize that secondary pressure is protected from the breakdown of chip interior module.Concrete operating principle are as follows: system is opened
When beginning powers on, chip is powered by VIN, as VIN < VTHPM0+VTHNM5+VD1When, input is in under-voltage condition, will not wake up LDO mould
Block, chip supply voltage VCC is 0V, stand-by power consumption 0uA at this time；Work as VTHPM0+VTHNM5+VD1<VIN<VTHPM3+VTHPM4+
VTHNM2+VTHNM3+VTHNM4+VD1When, first effect is opened by the pull-down circuit that the tenth field-effect tube NM5 of resistance R1 series connection is formed
Should pipe PM0, at this point, chip supply voltage VCC=VIN-VD1-VDS(PM0), power consumption 0uA；Work as VTHPM3+VTHPM4+VTHNM2+
VTHNM3+VTHNM4+VD1When < VIN, pull-down circuit opens the first field-effect tube PM0, and VCC slowly rises, when VCC rises to VTHPM3
+ VTHPM4+VTHNM2+VTHNM3+VTHNM4When, by resistance R1 Injection Current of the current mirror into pull-down circuit, adjust first
The conducting resistance of effect pipe PM0, after negative-feedback regu- lation, VCC is finally stable in VTHPM3+ VTHPM4+VTHNM2+VTHNM3+
VTHNM4, power consumption is related with the size of current mirror, resistance R1, about several uA；After BOOST type DCDC steady operation, VOUT > VIN
When, LDO power supply system automatically switches load outputs VOUT power supply, improves system working efficiency.
Wherein, VTH is the threshold voltage of field-effect tube, about 0.7-1V；VDS is the drain terminal voltage of field-effect tube, can
To ignore；VD1 is the forward conduction voltage drop of Xiao Jite diode, about 0.3V；VZD3And VZD4For the reversed of zener diode D4
Breakdown voltage, about 5.8V.
Specific implementation are as follows: the power supply module receives input voltage VIN or load output VOUT powers as LDO and is
The supply voltage of system, including diode D1 and D2, pull-down circuit receive VIN signal, work as VIN > VTHPM0+VTHNM5When, drop-down the
The gate terminal of one field-effect tube PM0 opens the first field-effect tube PM0, to wake up LDO power supply system.Clamp diode D3 connects
VIN signal is received, VIN > V is worked asZD3+VNM5When, clamp VGSPM0=VZD3, prevent the grid oxygen of PM0 pipe from puncturing.Feed circuit receives VCC
Signal, when VCC reaches VTHPM3+ VTHPM4+VTHNM2+VTHNM3+VTHNM4When, feedback current is generated by current mirror and is injected into electricity
R1 is hindered, the first field-effect tube PM0 conducting resistance is adjusted, to stablize chip interior supply voltage VCC.Zener diode D4 detection
VCC signal, when VCC reaches the breakdown reverse voltage V of zener diode D4ZD4When, by zener diode D4 leakage current, from
And it realizes secondary pressure protection and prevents chip interior module from puncturing.
From the foregoing, the output voltage VCC of LDO power supply system is related with the threshold value VTH of PMOS tube and NMOS tube, can lead to
The W/L size for crossing reasonable design PMOS tube and NMOS tube, reaches under all process corners and temperature conditions, VCC variation range 4V-
6V fully meets power supply product design requirement, meanwhile, it, can be in current mirror parallel connection in order to make VCC reach higher required precision
Circuit is trimmed, realizes the output voltage VCC of higher precision, the not additional start-up circuit of the LDO power supply system that this example provides,
Biasing circuit and operational amplifier, have the characteristics that low in energy consumption and with high accuracy, meet the design requirement of power supply product, are not present
The factors such as starting problem and stand-by power consumption problem influence, and realize that LDO power supply system stabilizes the output voltage.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Therefore it cannot understand limitations on the scope of the patent of the present invention.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range, therefore, protection scope of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC, which is characterized in that including power supply
Module, current mirror, pull-down circuit, feed circuit and the first field-effect tube PM0；
One end of the feed circuit connects current mirror, and the other end of feed circuit connects power supply VCC, the current mirror it is another
End is separately connected the source electrode and grid of pull-down circuit, the first field-effect tube PM0, the source electrode connection of the first field-effect tube PM0
The drain electrode of power supply module, the first field-effect tube PM0 connects feed circuit.
2. the LDO power supply system of the wide input voltage low-power consumption according to claim 1 based on BOOST type DCDC, special
Sign is that the LDO power supply system further includes clamp diode D3, and one end of the clamp diode D3 connects the first field-effect
The grid of pipe PM0, the other end of clamp diode D3 connect the source electrode of the first field-effect tube PM0.
3. the LDO power supply system of the wide input voltage low-power consumption according to claim 1 based on BOOST type DCDC, special
Sign is that the LDO power supply system further includes zener diode D4, and the both ends of the zener diode D4 are connected to feedback
The both ends of circuit.
4. the LDO power supply system of the wide input voltage low-power consumption according to claim 1 based on BOOST type DCDC, special
Sign is that the power supply module includes diode D1 and diode D2, the diode D1 connection VIN, the diode D2 company
Meet VOUT.
5. the LDO power supply system of the wide input voltage low-power consumption according to claim 1 based on BOOST type DCDC, special
Sign is that the current mirror includes the second field-effect tube PM1, third field-effect tube PM2, the 4th field-effect tube NM1 and the 5th
Effect pipe NM2；The grid of the second field-effect tube PM1 is connected together with the grid of third field-effect tube PM2 to be followed by
The drain electrode of four field-effect tube NM1；The source electrode of the second field-effect tube PM1 and the source electrode of third field-effect tube PM2 are connected to one
It rises and is followed by power supply module；The drain electrode of the second field-effect tube PM1 connects the drain electrode of the 4th field-effect tube NM1, described
The drain electrode of third field-effect tube PM2 connects the pull-down circuit；The source electrode of the 4th field-effect tube NM1 connects the 5th field-effect
The source electrode of pipe NM2, the grid of the 4th field-effect tube NM1 connect the grid of the 5th field-effect tube NM2.
6. the LDO power supply system of the wide input voltage low-power consumption according to claim 5 based on BOOST type DCDC, special
Sign is that the feed circuit includes the 5th field-effect tube NM2, the 6th field-effect tube NM3, the 7th field-effect tube NM4, the 8th
Effect pipe PM3 and the 9th field-effect tube PM4；The grid of the 5th field-effect tube NM2 and drain electrode the 6th field-effect of common connection
The source electrode of pipe NM3, the source electrode of the 7th field-effect tube NM4 of grid and the common connection of drain electrode of the 6th field-effect tube NM3 are described
The drain electrode of the 9th field-effect tube PM4 of grid and the common connection of drain electrode of 7th field-effect tube NM4, the 9th field-effect tube PM4
Grid connect the grid of the 7th field-effect tube NM4, the grid of the 8th field-effect tube PM3 and the common connection the 9th of drain electrode
The source electrode of the source electrode of effect pipe PM4, the 8th field-effect tube PM3 connects power supply VCC.
7. the LDO power supply system of the wide input voltage low-power consumption according to claim 1 based on BOOST type DCDC, special
Sign is that the pull-down circuit includes the tenth field-effect tube NM5 and resistance R1, the grid of the tenth field-effect tube NM5 and leakage
One end of resistance R1 is extremely connected jointly, and the other end of the resistance R1 and the source electrode of the tenth field-effect tube NM5 are separately connected electric current
Mirror.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910540424.XA CN110311561A (en) | 2019-06-21 | 2019-06-21 | A kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC |
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| CN201910540424.XA CN110311561A (en) | 2019-06-21 | 2019-06-21 | A kind of LDO power supply system of the wide input voltage low-power consumption based on BOOST type DCDC |
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| CN115842533A (en) * | 2023-02-23 | 2023-03-24 | 芯翼信息科技(南京)有限公司 | Low-voltage broadband ultra-low power consumption ring oscillator |
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| CN113809804A (en) * | 2021-09-22 | 2021-12-17 | 深圳矽递科技股份有限公司 | Low dropout power supply circuit and portable low-power consumption equipment |
| CN114879791A (en) * | 2022-04-28 | 2022-08-09 | 荣湃半导体（上海）有限公司 | Self-starting voltage stabilizing circuit |
| CN115842533A (en) * | 2023-02-23 | 2023-03-24 | 芯翼信息科技(南京)有限公司 | Low-voltage broadband ultra-low power consumption ring oscillator |
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Application publication date: 20191008 |