RT9013

500mA, Low Dropout, Low Noise Ultra-Fast Without

Bypass Capacitor CMOS LDO Regulator
General Description Features
The RT9013 is a high-performance, 500mA LDO regulator, Wide Operating Voltage Ranges : 2.2V to 5.5V
offering extremely high PSRR and ultra-low dropout. Ideal Low Dropout : 250mV at 500mA
for portable RF and wireless applications with demanding Ultra-Low-Noise for RF Application
performance and space requirements. Ultra-Fast Response in Line/Load Transient
Current Limiting Protection
The RT9013 quiescent current as low as 25μA, further Thermal Shutdown Protection
prolonging the battery life. The RT9013 also works with High Power Supply Rejection Ratio
low-ESR ceramic capacitors, reducing the amount of board Output Only 1μμF Capacitor Required for Stability
space necessary for power applications, critical in hand- TTL-Logic-Controlled Shutdown Input
held wireless devices. RoHS Compliant and 100% Lead (Pb)-Free

The RT9013 consumes typical 0.7μA in shutdown mode Applications

and has fast turn-on time less than 40μs. The other features CDMA/GSM Cellular Handsets
include ultra-low dropout voltage, high output accuracy, Portable Information Appliances
current limiting protection, and high ripple rejection ratio. Laptop, Palmtops, Notebook Computers
Available in the SC-82, SOT-23-5, SC-70-5 and WDFN-6L Hand-Held Instruments
2x2 package. Mini PCI & PCI-Express Cards
PCMCIA & New Cards
Ordering Information
RT9013 - Marking Information
Package Type
Y : SC-82 For marking information, contact our sales representative
B : SOT-23-5 directly or through a Richtek distributor located in your
U5 : SC-70-5
area.
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
P : Pb Free
Pin Configurations
G : Green (Halogen Free and Pb Free) (TOP VIEW)
VIN VOUT
Fixed Output Voltage
12 : 1.2V 4 3

13 : 1.3V
2
15 : 1.5V
16 : 1.6V EN GND
: SC-82
32 : 3.2V
VOUT NC
33 : 3.3V
1B : 1.25V 5 4
1H : 1.85V
2H : 2.85V 2 3
Note :
Richtek products are : VIN GND EN

` RoHS compliant and compatible with the current require- SOT-23-5 / SC-70-5

ments of IPC/JEDEC J-STD-020.

EN 1 6 NC
` Suitable for use in SnPb or Pb-free soldering processes.
GND

GND 2 5 NC
VIN 3 7 4 VOUT

WDFN-6L 2x2
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RT9013
Typical Application Circuit

VIN VIN VOUT VOUT

CIN COUT
1µF/X7R 1µF/X7R
RT9013
Chip Enable
EN NC
Rpull_down GND
100k

Functional Pin Description

Pin Number
SOT-23-5 / Pin Name Pin Function
SC-82 WDFN-6L 2x2
SC-70-5
3 5 4 VOUT Regulator Output.
-- 4 5, 6 NC No Internal Connection.
2, Common Ground. The exposed pad must be soldered to a
2 2 7 (Exposed GND large PCB and connected to GND for maximum power
Pad) dissipation.
Enable Input Logic, Active High. When the EN goes to a
1 3 1 EN
logic low, the device will be shutdown mode.
4 1 3 VIN Supply Input.

Function Block Diagram

POR Current
EN
OTP Limit
VIN
VREF
- MOS
+ Driver

VOUT

GND

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 RT9013
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6V
EN Input Voltage ----------------------------------------------------------------------------------------------------------- 6V
Power Dissipation, PD @ TA = 25°C
SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 0.4W
SC-70-5/ SC-82 ------------------------------------------------------------------------------------------------------------ 0.3W
WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 0.606W
Package Thermal Resistance (Note 2)
SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W
SOT-23-5, θJC -------------------------------------------------------------------------------------------------------------- 25°C/W
SC-70-5/ SC-82, θJA ------------------------------------------------------------------------------------------------------ 333°C/W
WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W
WDFN-6L 2x2, θJC --------------------------------------------------------------------------------------------------------- 20°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM -------------------------------------------------------------------------------------------------------------------------- 2kV
MM ---------------------------------------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions (Note 4)

Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.2V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C

Electrical Characteristics
(VIN = VOUT + 0.5V, VEN = VIN, CIN = COUT = 1μF (Ceramic, X7R), TA = 25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Input Voltage Range VIN 2.2 -- 5.5 V
VOUT = 1.5V, COUT = 1μF, IOUT =
Output Noise Voltage VON -- 30 -- μVRMS
0mA
Output Voltage Accuracy
ΔVOUT IOUT = 10mA −2 0 +2 %
(Fixed Output Voltage)
Quiescent Current (Note 5) IQ VEN = 5V, IOUT = 0mA -- 25 50 μA
Shutdown Current ISHDN VEN = 0V -- 0.7 1.5 μA
RLOAD = 0Ω, 2.2V ≤ VIN < 2.6V 0.4 0.5 0.85 A
Current Limit ILIM
RLOAD = 0Ω, 2.7V ≤ VIN ≤ 5.5V 0.5 0.6 0.85 A
IOUT = 400mA, 2.2V ≤ VIN < 2.7V -- 160 320
Dropout Voltage (Note 6) VDROP mV
IOUT = 500mA, 2.7V ≤ VIN ≤ 5.5V -- 250 400
1mA < IOUT < 400mA
-- -- 0.6
Load Regulation (Note 7) 2.2V ≤ VIN < 2.7V
ΔVLOAD %
(Fixed Output Voltage) 1mA < IOUT < 500mA
-- -- 1
2.7V ≤ VIN ≤ 5.5V

To be continued

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RT9013
Parameter Symbol Test Conditions Min Typ Max Unit
Logic-Low VIL 0 -- 0.6
EN Threshold Voltage V
Logic-High VIH 1.6 -- 5.5
Enable Pin Current IEN -- 0.1 1 μA
Power Supply Rejection Rate PSRR IOUT = 100mA, f = 10kHz -- −50 -- dB
VIN = (VOUT+0.5) to 5.5V,
Line Regulation ΔVLINE -- 0.01 0.2 %/V
IOUT = 1mA
Thermal Shutdown Temperature TSD -- 170 --
°C
Thermal Shutdown Hysteresis ΔT SD -- 30 --

Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational
sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may
remain possibility to affect device reliability.
Note 2. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of JEDEC 51-3
thermal measurement standard. The case position of θJC is on the exposed pad for the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no
load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin
current.
Note 6. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV.
Note 7. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load
regulation in the load range from 10mA to 500mA.

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 RT9013
Typical Operating Characteristics
(CIN = COUT = 1μ/X7R, unless otherwise specified)
Output Voltage vs. Temperature Quiescent Current vs. Temperature
1.60 30
VIN = 2.5V VIN = 2.5V
1.58 28
1.56 26

Quiescent Current (uA)

Output Voltage (V)

1.54 24
1.52 22
1.50 20
1.48 18
1.46 16
1.44 14
1.42 12
1.40 10
-50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125
Temperature (°C) Temperature (°C)

Dropout Voltage vs. Load Current Dropout Voltage vs. Load Current
350 350
RT9013-33PQW RT9013-25PQW
300 TJ = 125°C 300 TJ = 125°C
Dropout Voltage (mV)

Dropout Voltage (mV)

250 250
TJ = 25°C TJ = 25°C
200 200

150 150
TJ = -40°C
TJ = -40°C
100 100

50 50

0 0
0 50 100 150 200 250 300 350 400 450 500 0 50 100 150 200 250 300 350 400 450 500
Load Current (mA) Load Current (mA)

EN Pin Shutdown Response Start Up

VIN = 2.5V, ILOAD = 50mA VIN = 2.5V, ILOAD = 75mA
EN Pin Voltage
EN Pin Voltage

4 RT9013-15PQW 4 RT9013-15PQW
(V)
(V)

2 2

0 0
Output Voltage
Output Voltage

2 1.0
(V)

1 0.5
(V)

0 0

Time (100μs/Div) Time (5μs/Div)

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RT9013

Line Transient Response Line Transient Response

VIN = 2.6V to 3.6V, ILOAD = 10mA VIN = 2.6V to 3.6V, ILOAD = 100mA
Input Voltage
Deviation (V)

Input Voltage
Deviation (V)
3.6 3.6

2.6 2.6

Deviation (mV)
Deviation (mV)

Output Voltage
Output Voltage

20 20

0 0

-20 -20
RT9013-15PQW RT9013-15PQW

Time (100μs/Div) Time (100μs/Div)

Load Transient Response Load Transient Response

VIN = 2.5V, ILOAD = 10mA to 100mA VIN = 2.5V, ILOAD = 10mA to 300mA
Load Current
Load Current

100 400
(mA)
(mA)

50 200

0 0
Deviation (mV)
Deviation (mV)

Output Voltage
Output Voltage

50 50

0 0

-50 -50
RT9013-15PQW RT9013-15PQW

Time (100μs/Div) Time (100μs/Div)

Noise Noise
VIN = 3.0V (By Battery), No Load VIN = 3.0V (By Battery), ILOAD = 10mA
300 300

200 200
Noise (μV/Div)
Noise (μV/Div)

100 100

0 0

-100 -100

-200 -200

-300 -300
RT9013-15PQW RT9013-15PQW

Time (10ms/Div) Time (10ms/Div)

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 RT9013

Noise PSRR
20
VIN = 3.0V (By Battery), ILOAD = 300mA VIN = 2.5V to 2.6V
10
300
0
200
Noise (μV/Div)

-10
100

PSRR(dB)
-20
0
-30
-100 ILOAD = 100mA
-40 ILOAD = 300mA
-200 -50

-300 -60 ILOAD = 10mA

RT9013-15PQW
-70
Time (10ms/Div) 10 100 1000 10000 100000 1000000
Frequency (Hz)

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RT9013
Applications Information
Like any low-dropout regulator, the external capacitors used Enable
with the RT9013 must be carefully selected for regulator The RT9013 goes into sleep mode when the EN pin is in a
stability and performance. Using a capacitor whose value logic low condition. During this condition, the RT9013 has
is > 1μF/X7R on the RT9013 input and the amount of an EN pin to turn on or turn off regulator, When the EN pin
capacitance can be increased without limit. The input is logic hight, the regulator will be turned on. The supply
capacitor must be located a distance of not more than 0.5 current to 0.7μA typical. The EN pin may be directly tied
inch from the input pin of the IC and returned to a clean to VIN to keep the part on. The Enable input is CMOS
analog ground. Any good quality ceramic can be used for logic and cannot be left floating.
this capacitor. The capacitor with larger value and lower
ESR (equivalent series resistance) provides better PSRR PSRR
and line-transient response.
The power supply rejection ratio (PSRR) is defined as the
The output capacitor must meet both requirements for gain from the input to output divided by the gain from the
minimum amount of capacitance and ESR in all LDOs supply to the output. The PSRR is found to be
application. The RT9013 is designed specifically to work ⎛ ⎞
PSRR = 20 × log⎜ ΔGain Error ⎟
with low ESR ceramic output capacitor in space-saving ⎝ ΔSupply ⎠
and performance consideration. Using a ceramic capacitor Note that when heavy load measuring, Δsupply will cause
whose value is at least 1μF with ESR is > 5mΩ on the Δtemperature. And Δtemperature will cause Δoutput
RT9013 output ensures stability. The RT9013 still works voltage. So the heavy load PSRR measuring is include
well with output capacitor of other types due to the wide temperature effect.
stable ESR range. Figure 1. shows the curves of allowable
Current limit
ESR range as a function of load current for various output
capacitor values. Output capacitor of larger capacitance The RT9013 contains an independent current limiter, which
can reduce noise and improve load transient response, monitors and controls the pass transistor's gate voltage,
stability, and PSRR. The output capacitor should be located limiting the output current to 0.6A (typ.). The output can
not more than 0.5 inch from the VOUT pin of the RT9013 be shorted to ground indefinitely without damaging the part.
and returned to a clean analog ground.
Thermal Considerations
Region of Stable COUT ESR vs. Load Current Thermal protection limits power dissipation in RT9013.
100.000
100
Unstable Range When the operation junction temperature exceeds 170°C,
(Ω)ESR (Ω)

the OTP circuit starts the thermal shutdown function and

10.000
0
turns the pass element off. The pass element turn on again
after the junction temperature cools by 30°C.
COUT

1
1.000
OUT ESR

Stable Range
For continuous operation, do not exceed absolute
Region of CStable

0.100
0.1 maximum operation junction temperature 125°C. The
power dissipation definition in device is :
0.01
0.010
PD = (VIN − VOUT) x IOUT + VIN x IQ
COUT = 1μF Unstable Range
0.001
The maximum power dissipation depends on the thermal
0 50 100 150 200 250 300
resistance of IC package, PCB layout, the rate of
Load Current (mA)
surroundings airflow and temperature difference between
Figure 1 junction to ambient. The maximum power dissipation can
be calculated by following formula :

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 RT9013
PD(MAX) = ( TJ(MAX) − TA ) /θJA

Where T J(MAX) is the maximum operation junction

temperature, TA is the ambient temperature and the θJA is
the junction to ambient thermal resistance.

For recommended operating conditions specification of

RT9013 the maximum junction temperature is 125°C and
TA is the operated ambient temperature. The junction to
ambient thermal resistance θJA (θJA is layout dependent)
for WDFN-6L 2x2 package is 165°C/W, SOT-23-5 package
is 250°C/W and SC-70-5/ SC-82 package is 333°C/W on
the standard JEDEC 51-3 single-layer thermal test board.
The maximum power dissipation at TA = 25°C can be
calculated by following formula :

PD(MAX) = (125°C − 25°C) / 165°C/W = 0.606 W for

WDFN-6L 2x2 packages

PD(MAX) = (125°C − 25°C) / 250°C/W = 0.400 W for

SOT-23-5 packages

PD(MAX) = (125°C − 25°C) / 333°C/W = 0.300 W for

SC-70-5/ SC-82 packages

The maximum power dissipation depends on operating

ambient temperature for fixed TJ(MAX) and thermal resistance
θJA. For RT9013 package, the Figure 2 of derating curves
allows the designer to see the effect of rising ambient
temperature on the maximum power dissipation allowed.
0.7
Single Layer PCB
0.6
Power Dissipation (W)

0.5
SOT-23-5 WDFN-6L 2x2
0.4

0.3
SC-70-5/
SC-82
0.2

0.1

0
0 12.5 25 37.5 50 62.5 75 87.5 100 113 125
Ambient Temperature (°C)

Figure 2. Derating Curves for RT9013 Packages

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RT9013
Outline Dimension

D H
e
L

C B

b b1

A
A1
e

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 0.800 1.100 0.031 0.043
A1 0.000 0.100 0.000 0.004
B 1.150 1.350 0.045 0.053
b 0.150 0.400 0.006 0.016
b1 0.350 0.500 0.014 0.020
C 1.800 2.450 0.071 0.096
D 1.800 2.200 0.071 0.087
e 1.300 0.051
H 0.080 0.260 0.003 0.010
L 0.200 0.460 0.008 0.018

SC-82 Surface Mount Package

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 RT9013

H
D
L

C B

A
A1
e

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 0.889 1.295 0.035 0.051
A1 0.000 0.152 0.000 0.006
B 1.397 1.803 0.055 0.071
b 0.356 0.559 0.014 0.022
C 2.591 2.997 0.102 0.118
D 2.692 3.099 0.106 0.122
e 0.838 1.041 0.033 0.041
H 0.080 0.254 0.003 0.010
L 0.300 0.610 0.012 0.024

SOT-23-5 Surface Mount Package

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RT9013

H
D
L

C B

A
A1
e

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 0.800 1.100 0.031 0.044
A1 0.000 0.100 0.000 0.004
B 1.150 1.350 0.045 0.054
b 0.150 0.400 0.006 0.016
C 1.800 2.450 0.071 0.096
D 1.800 2.250 0.071 0.089
e 0.650 0.026
H 0.080 0.260 0.003 0.010
L 0.210 0.460 0.008 0.018

SC-70-5 Surface Mount Package

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 RT9013

D D2

E E2

SEE DETAIL A
1

2 1 2 1
e
b
A
A3 DETAIL A
A1
Pin #1 ID and Tie Bar Mark Options

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 0.700 0.800 0.028 0.031
A1 0.000 0.050 0.000 0.002
A3 0.175 0.250 0.007 0.010
b 0.200 0.350 0.008 0.014
D 1.950 2.050 0.077 0.081
D2 1.000 1.450 0.039 0.057
E 1.950 2.050 0.077 0.081
E2 0.500 0.850 0.020 0.033
e 0.650 0.026
L 0.300 0.400 0.012 0.016

W-Type 6L DFN 2x2 Package

Richtek Technology Corporation Richtek Technology Corporation

Headquarter Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City 5F, No. 95, Minchiuan Road, Hsintien City
Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611 Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com

Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design,
specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed
by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.

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