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UNISONIC TECHNOLOGIES CO., LTD L1131C
Preliminary CMOS IC
LOW NOISE 150mA LDO REGULATOR
DESCRIPTION
The UTC L1131C is a typical LDO (linear regulator) with the features of High output voltage accuracy, low supply current, low ON-resistance, and high ripple rejection. During normal operation of UTC L1131C, the dropout voltage is very low, and the response of line transient and load transient are very well. Inside each UTC L1131C, there're many functions which can be seen in the block figure, for example, a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit, and a chip enable circuit. The UTC L1131C can be used as an ideal of power source for hand-held communication equipment, such as cameras, VCRs, camcorders and other battery-powered equipment.
FEATURES
* Ultra Supply Current: 75A(typ.) * Standby Mode: 0.1A(typ.) * Very Low Dropout Voltage: 0.28V(typ.) @IOUT=150mA, VOUT=2.5V * Ripple Rejection: 70dB(typ.)@f=1kHz 60dB(typ.)@f=10kHz * Temperature-Drift Coefficient of Output Voltage: 100ppm/C(typ.) * Well Line Regulation: 0.02%/V(typ.) * Output Voltage Accuracy: 2.0%(typ.) * Internal Fold Back Protection Circuit * CIN=COUT=1F or more (Ceramic capacitors) are recommended to be used with this IC * Halogen Free
ORDERING INFORMATION
Ordering Number Package 1 I Pin Assignment 2 3 4 G C N 5 O Packing Tape Reel
L1131CG-xx-AF5-R SOT-25 Note: Pin Assignment: I:VIN O:VOUT G:GND C:CE N:NC
www.unisonic.com.tw Copyright (c) 2009 Unisonic Technologies Co., Ltd
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L1131C
MARKING
PACKAGE VOLTAGE CODE
Preliminary
CMOS IC
MARKING 3 2 1
SOT-25
20:2.0V 25:2.5V
HXXCG 4 5
Voltage Code
PIN DESCRIPTION
PIN NO 1 2 3 4 5 PIN NAME VIN GND CE NC VOUT DESCRIPTION Input pin Ground pin Input pin for chip enable, "high" means enable the chip. No connection Output pin
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
BLOCK DIAGRAM
VIN
Preliminary
CMOS IC
VOUT +
Reference Voltage CE
Current Limit GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
ABSOLUTE MAXIMUM RATING
Preliminary
CMOS IC
PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 6.5 V Input Voltage (CE Pin) VCE 6.5 V Output Voltage VOUT -0.3~VIN+0.3 V Output Current IOUT 200 mA Power Dissipation PD 420 mW Junction Temperature TJ +125 Operating Temperature TOPR -40 ~ +85 Storage Temperature TSTG -55 ~ +125 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.
ELECTRICAL CHARACTERISTICS
L1131C-2.0V PARAMETER Output Voltage Input Voltage Load Regulation Output Current Supply Current Supply Current (Standby) Short Current Limit CE Input Voltage Output Noise CE Pull-down Resistance Ripple Rejection Dropout Voltage Line Regulation Output Voltage Temperature Coefficient On Resistance of Nch for Auto Discharge High Low SYMBOL VOUT VIN VOUT IOUT IOUT ISS IST-BY ILIMIT VCEH VCEL eN RPD RR VD VOUT VIN
VOUT T
TEST CONDITIONS VIN = Set VOUT+1V 1mA IOUT 30mA VIN = Set VOUT+1V 1mA IOUT 150mA VIN-VOUT = 1.0V VIN = Set VOUT+1V, IOUT = 0mA VIN= Set VOUT+1V VCE = GND VOUT = 0V
MIN 1.96
TYP
MAX 2.04 6.0
UNIT V V mV mA
22 150 75 0.1 40 1.5 0.0
40
95 1.0 VIN 0.3
A A mA V V Vrms M dB dB
BW = 10Hz ~ 100kHz 0.7 Ripple 0.5Vp-p VIN-VOUT = 1.0V, IOUT = 30mA IOUT=150mA Set VOUT+0.5V VIN6.0V, IOUT=30mA IOUT = 30mA -40C TOPR 85C VCE = 0V f=1kHz f=10kHz
30 2.0 70 60 0.32 0.02 100 60 0.55 0.10 8.0
V %/V
ppm/
RLOW
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
L1131C-2.5V PARAMETER Output Voltage Input Voltage Load Regulation Output Current Supply Current Supply Current (Standby) Short Current Limit CE Input Voltage Output Noise CE Pull-down Resistance Ripple Rejection Dropout Voltage Line Regulation Output Voltage Temperature Coefficient On Resistance of Nch for Auto Discharge High Low SYMBOL VOUT
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
TEST CONDITIONS VIN = Set VOUT+1V 1mA IOUT 30mA MIN 2.45 TYP MAX 2.55 6.0 22 150 75 0.1 40 1.5 0.0 BW = 10Hz ~ 100kHz 0.7 Ripple 0.5Vp-p VIN-VOUT = 1.0V, IOUT = 30mA f=1kHz f=10kHz 30 2.0 70 60 0.28 0.02 100 60 0.50 0.10 8.0 VIN 0.3 95 1.0 40 UNIT V V mV mA A A mA V V Vrms M dB dB V %/V
ppm/
VIN VOUT VIN = Set VOUT+1V IOUT 1mA IOUT 150mA IOUT ISS IST-BY ILIMIT VCEH VCEL eN RPD RR VIN-VOUT = 1.0V VIN = Set VOUT+1V, IOUT = 0mA VIN= Set VOUT+1V VCE = GND VOUT = 0V
VD IOUT=150mA VOUT Set VOUT+0.5V VIN6.0V VIN IOUT = 30mA VOUT IOUT = 30mA T -40C TOPR 85C RLOW VCE = 0V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
TEST CIRCUIT
IN ISS
Preliminary
CMOS IC
VIN CE UTC L1131C-xx GND
VOUT
OUT
1.0F
1.0F
TYPICAL APPLICATION CIRCUIT
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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