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UNISONIC TECHNOLOGIES CO., LTD
L1131C
Preliminary
LOW NOISE 150mA LDO
REGULATOR
CMOS IC
„ 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: 75µA(typ.)
* Standby Mode: 0.1µA(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=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
* Halogen Free
„ ORDERING INFORMATION
Ordering Number
L1131CG-xx-AF5-R
Note: Pin Assignment: I:VIN
O:VOUT
Package
SOT-25
G:GND C:CE
1
I
N:NC
Pin Assignment
234
GCN
5
O
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2009 Unisonic Technologies Co., Ltd
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L1131C
Preliminary
„ MARKING
PACKAGE VOLTAGE CODE
SOT-25
20:2.0V
25:2.5V
MARKING
321
HXXCG
45
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
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
„ BLOCK DIAGRAM
VIN
CE
Preliminary
-
+
Reference
Voltage
Current Limit
CMOS IC
VOUT
GND
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www.unisonic.com.tw
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L1131C
Preliminary
CMOS IC
„ ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN 6.5 V
Input Voltage (CE Pin)
Output Voltage
VCE
VOUT
6.5
0.3~VIN+0.3
V
V
Output Current
IOUT 200 mA
Power Dissipation
Junction Temperature
PD 420 mW
TJ
+125
°С
Operating Temperature
TOPR
40 ~ +85
°С
Storage Temperature
TSTG
55 ~ +125
°С
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
High
Low
Ripple Rejection
Dropout Voltage
Line Regulation
Output Voltage
Temperature Coefficient
On Resistance of Nch for Auto
Discharge
SYMBOL
TEST CONDITIONS
VOUT
VIN
ΔVOUT
ΔIOUT
VIN = Set VOUT+1V
1mA IOUT 30mA
VIN = Set VOUT+1V
1mA IOUT150mA
IOUT VINVOUT = 1.0V
ISS VIN = Set VOUT+1V, IOUT = 0mA
IST-BY VIN= Set VOUT+1V VCE = GND
ILIMIT VOUT = 0V
VCEH
VCEL
eN BW = 10Hz ~ 100kHz
RPD
RR
Ripple 0.5Vpp
f=1kHz
VINVOUT = 1.0V, IOUT = 30mA f=10kHz
VD
ΔVOUT
ΔVIN
ΔVOUT
ΔT
IOUT=150mA
Set VOUT+0.5V VIN6.0V, IOUT=30mA
IOUT = 30mA
40°C TOPR 85°C
RLOW VCE = 0V
MIN TYP MAX UNIT
1.96 2.04 V
6.0 V
22 40 mV
150 mA
75 95 μA
0.1 1.0 μA
40 mA
1.5 VIN V
0.0 0.3 V
30 µVrms
0.7 2.0 8.0 M
70 dB
60 dB
0.32 0.55 V
0.02 0.10 %/V
±100
60
ppm/°С
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1131C
Preliminary
CMOS IC
„ ELECTRICAL CHARACTERISTICS(Cont.)
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
High
Low
Ripple Rejection
Dropout Voltage
Line Regulation
Output Voltage
Temperature Coefficient
On Resistance of Nch for Auto
Discharge
SYMBOL
TEST CONDITIONS
VOUT
VIN = Set VOUT+1V
1mA IOUT 30mA
VIN
ΔVOUT
ΔIOUT
VIN = Set VOUT+1V
1mA IOUT150mA
IOUT VINVOUT = 1.0V
ISS VIN = Set VOUT+1V, IOUT = 0mA
IST-BY VIN= Set VOUT+1V VCE = GND
ILIMIT VOUT = 0V
VCEH
VCEL
eN BW = 10Hz ~ 100kHz
RPD
RR Ripple 0.5Vpp
f=1kHz
VINVOUT = 1.0V, IOUT = 30mA f=10kHz
VD
ΔVOUT
ΔVIN
ΔVOUT
ΔT
IOUT=150mA
Set VOUT+0.5V VIN6.0V
IOUT = 30mA
IOUT = 30mA
40°C TOPR 85°C
MIN
2.45
150
1.5
0.0
0.7
TYP
22
75
0.1
40
30
2.0
70
60
0.28
0.02
±100
MAX UNIT
2.55 V
6.0 V
40 mV
95
1.0
VIN
0.3
8.0
0.50
mA
μA
μA
mA
V
V
µVrms
M
dB
dB
V
0.10 %/V
ppm/°С
RLOW VCE = 0V
60
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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