UNISONIC TECHNOLOGIES CO.

, LTD
UZ1086 LINEAR INTEGRATED CIRCUIT

1.5A ADJUSTABLE/FIXED LOW

DROPOUT LINEAR
REGULATOR

„ DESCRIPTION
The UTC UZ1086 and UZ1086-1.8V, 2.5V, 2.85V, 3.3V and 5V
are low dropout three-terminal regulators with 1.5A output current
capability. These devices have been optimized for low voltage where
transient response and minimum input voltage are critical. The 2.85V
version is designed specifically to be used in Active Terminators for
SCSI bus.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limiting provides
protection against any combination of overload and ambient
temperatures that would create excessive junction temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current of the
UZ1086 flows into the load, increasing efficiency.

Datasheet.Live
„ FEATURES
*Low dropout voltage
*Load regulation: 0.05% typical
*Trimmed current limit
*On-chip thermal limiting
*Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V, 3.3V, 5V
Lead-free: UZ1086L-xx
Halogen-free: UZ1086G-xx

„ ORDERING INFORMATION
Ordering Number Pin Assignment
Package Packing
Normal Lead Free Halogen-Free 1 2 3
UZ1086-xx-AA3-R UZ1086L-xx-AA3-R UZ1086G-xx-AA3-R SOT-223 A/G O I Tape Reel
UZ1086-xx-TA3-T UZ1086L-xx-TA3-T UZ1086G-xx-TA3-T TO-220 A/G O I Tube
UZ1086-xx-TN3-R UZ1086L-xx-TN3-R UZ1086G-xx-TN3-R TO-252 A/G O I Tape Reel
UZ1086-xx-TQ2-R UZ1086L-xx-TQ2-R UZ1086G-xx-TQ2-R TO-263 A/G O I Tape Reel
UZ1086-xx-TQ2-T UZ1086L-xx-TQ2-T UZ1086G-xx-TQ2-T TO-263 A/G O I Tube
UZ1086-xx-TQ3-R UZ1086L-xx-TQ3-R UZ1086G-xx-TQ3-R TO-263-3 A/G O I Tape Reel
UZ1086-xx-TQ3-T UZ1086L-xx-TQ3-T UZ1086G-xx-TQ3-T TO-263-3 A/G O I Tube
Note: 1. xx: Output Voltage, refer to Marking Information.
2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator)

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UZ1086 LINEAR INTEGRATED CIRCUIT
„ MARKING INFORMATION
PACKAGE VOLTAGE CODE MARKING

TO-220 UTC
L: Lead Free
TO-252 UZ1086
LOT Code G: Halogen Free
TO-263 18 :1.8V XX
Voltage Code Date Code
TO-263-3 25 :2.5V
2J :2.85V 1 2 3
33 :3.3V
50 :5.0V
AD :ADJ UZ1086 L: Lead Free
G: Halogen Free
SOT-223 XX
Voltage Code Date Code

1 2 3

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UZ1086 LINEAR INTEGRATED CIRCUIT
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATINGS UNIT
Input Voltage VIN 7.5 V
Junction Temperature TJ +125 °C
Operating Temperature TOPR 0 ~ +125 °C
Storage Temperature TSTG -40 ~ +150 °C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
„ THERMAL DATA
PARAMETER SYMBOL RATINGS UNIT
TO-252 12 °C/W
TO-220 4 °C/W
Junction to Ambient θJC
TO-263 4 °C/W
SOT-223 15 °C/W

„ ELECTRICAL CHARACTERISTICS (VIN≤7V, TJ=25°C, unless otherwise specified.)

PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
1.5V≤ (VIN-VOUT ) ≤5.75V
Reference Voltage VREF * 1.225 1.25 1.275 V
10mA≤IOUT≤1A
UZ1086-1.8 * 3.3V≤VIN≤7V 1.764 1.80 1.836 V
UZ1086-2.5 * 4V≤VIN≤7V 2.450 2.50 2.550 V
Output Voltage UZ1086-2.85 VOUT * 10mA≤IOUT≤1A 4.35V≤VIN≤7V 2.793 2.85 2.907 V
UZ1086-3.3 * 4.8V≤VIN≤7V 3.234 3.30 3.366 V
UZ1086-5.0 6.5V≤VIN≤7V 4.900 5.00 5.100 V
Line Regulation (Note1,2) ΔVOUT * (VOUT+1.5V) ≤VIN≤7V,IOUT=10mA 0.005 0.2 %
Load Regulation (Note1,2) ΔVOUT * VIN-VOUT=2V, 10mA≤IOUT≤1A 0.05 0.5 %
Dropout Voltage VD * IOUT=1.5A 1.30 1.50 V
Current Limit ILIMIT * VIN-VOUT=2V 1.6 2 A
Adjust Pin Current Iadj * 35 120 μA
1.5V≤ (VIN - VOUT ) ≤5.75V,
Adjust Pin Current Change ΔIadj * 0.2 5 μA
10mA≤IOUT≤1A
Minimum Load Current Io(min) * 1.5V≤ (VIN -VOUT) ≤5.75V 10 mA
Quiescent Current IQ * VIN =VOUT+1.25V 4 13 mA
f=120Hz, COUT=22μF, Tantalum
Ripple Rejection RR 60 72 dB
VIN -VOUT=3V, IOUT=1.5A
Thermal Regulation Ta=25°C, 30ms pulse 0.004 0.02 %/W
Temperature Stability ΔVOUT * 0.5 %
Long-Term Stability ΔVOUT Ta=125°C, 1000hrs 0.03 1.0 %
RMS Output Noise VOUT Ta=25°C, 10Hz≤f≤10kHz 0.003 %
Thermal shutdown Junction Temperature 155 °C
Thermal Shutdown Hysteresis 10 °C
Note:
* stand for specifications which apply over the designed operating temperature range.
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line
regulation are measured at a constant junction temperature by low duty cycle pulse testing.
2. Line and load regulation are guaranteed up to the maximum power dissipation. Power dissipation is
determined by input/output differential and the output current. Guaranteed maximum output power will not
be available over the full input/output voltage range.

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UZ1086 LINEAR INTEGRATED CIRCUIT
„ TYPICAL APPLICATION CIRCUIT

UZ1086
VIN=3.3V VIN VOUT 1.5V at 1.5A
+ +
10 F R1 22 F
ADJ 124

VOUT=VREF(1+R2/R1)+IAdj*R2 R2
24.9

UZ1086-2.85
VIN=5V VIN VOUT 2.85V at 1.5A
+ +
10 F 22 F
GND

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UZ1086 LINEAR INTEGRATED CIRCUIT
„ TYPICAL CHARACTERISTICS

Figure 1.Dropout Voltage vs.Output Current Figure 2. Load Regulation vs.Temperature

1.5 0.1
1.4 I=1A
0.0
1.3 5

Dropout Voltage Deviation(%)

1.2
Dropout Voltage (V)

0
1.1
1.0
-0.05
0.9
0.8 -0.1
0.7
0.6 -
0.15
0.5
0 -0.2
0 0.3 0.6 0.9 1.2 1.5 -75 -50 -25 0 25 50 75 100 125150 175
Output Current (A) Junction Temperature(°C)

Figure 3.Reference Votage vs.Temperature Figure 4.Output Voltage vs.Temperature

1.25 3.7
VOUT SET WITH 1% RESISTORS
1.245 3.65
1.24 3.6
VOUT =3.6V
Reference Voltage(V)

1.235
Reference Voltage(V)

3.55
1.23 3.5
1.225 3.45
1.22 3.4
1.215 3.35
1.21 3.3 VOUT =3.3V
1.205 3.25
UZ1086 adjustable Only
1.2 3.2
-75 -50 -25 0 25 50 75 100 125150 175 -75 -50 -25 0 25 50 75 100 125150 175
Junction Temperature(°C) Junction Temperature(°C)

Figure 5.Minimum Load Current vs.Temperature Figure 6.Adjust Pin Current vs.Temperature
5 100
90 Note1.UZ1086 Only

4 80
Minimum Load Current (mA)

Adjust Pin Current ( A)

70
3 60
50
2 40
30
1 20
10
0 0
-75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125150 175
Junction Temperature(°C) Junction Temperature(°C)

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UZ1086 LINEAR INTEGRATED CIRCUIT
„ TYPICAL CHARACTERISTICS(Cont.)
Short- Circuit Current (A)

Ripple Rejection (dB)

UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.

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