Document
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
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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
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L1131C
BLOCK DIAGRAM
VIN
CE
Preliminary
+
Reference Voltage
Current Limit
CMOS IC
VOUT
GND
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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 ≤ IOUT≤ 150mA
IOUT VIN−VOUT = 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 0.5Vp−p
f=1kHz
VIN−VOUT = 1.0V, IOUT = 30mA f=10kHz
VD
ΔVOUT ΔVIN
ΔVOUT ΔT
IOUT=150mA
Set VOUT+0.5V ≤VIN≤6.0V, 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 MΩ
70 dB 60 dB 0.32 0.55 V
0.02 0.10 %/V
±100 60
ppm/°С
Ω
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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 ≤ IOUT≤ 150mA
IOUT VIN−VOUT = 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 0.5Vp−p
f=1kHz
VIN−VOUT = 1.0V, IOUT = 30mA f=10kHz
VD
ΔVOUT ΔVIN
ΔVOUT ΔT
IOUT=150mA
Set VOUT+0.5V ≤VIN≤6.0V 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 MΩ dB dB V
0.10 %/V
ppm/°С
RLOW VCE = 0V
60 Ω
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L1131C
TEST CIRCUIT
IN ISS
1.0µF
Preliminary
VIN VOUT
CE
UTC L1131C-xx
GND
CMOS IC
OUT 1.0µF
TYPI.