UNISONIC TECHNOLOGIES CO., LTD
LR9102/A
CMOS IC
1 of 5
Copyright © 2022 Unisonic Technologies Co., Ltd
QW-R502-923.R
LOW NOISE 300mA LDO
REGULATOR
DESCRIPTION
The UTC LR9102/A 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 operation of the UTC LR9102/A, the dropout voltage is
very low and the response of line transient and load transient are
very well.
Internally, there’re many functions of UTC LR9102/A which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC LR9102/A, with auto
discharge function at off state.
The UTC LR9102/A can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and
power source for battery-powered equipment.
FEATURES
* Ultra Supply Current: LR9102: 50µA (Typ.)
LR9102A: 90µA (Typ.)
* Standby Mode: 0.1µA (Typ.)
* Very Low Dropout Voltage: 0.12V (Typ.)
@I
OUT
=300mA, V
OUT
=2.85V
* Ripple Rejection: 75dB (Typ.)
@ f=1kHz,V
OUT
=2.85V
* Temperature-Drift Coefficient
of Output Voltage:
±50ppm/°C (Typ.)
* Well Line Regulation: 0.02%/ V (Typ.)
* Output Voltage Accuracy: ±1.0%
* Internal Fold Back Protection
Circuit:
50mA (Typ.) @ short mode
* C
IN
=C
OUT
=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
SOT-25
SOT-353
SOT-23-5
(JEDEC TO-236)
1
3
5
2
4
1
3
5
2
4
1
3
5
2
4
DFN1616-6
1
DFN1820-6
1
SOT-23-3
(JEDEC TO-236)
2
1
3
DFN2020-6
1
SOT-23
(EIAJ SC-59)
2
1
3