UTC LR9101G-10-AE5-R, LR9101G-10-AL4-R, LR9101G-10-AL5-R, LR9101G-12-AE5-R, LR9101G-12-AL4-R Schematic [ru]

UNISONIC TECHNOLOGIES CO., LTD

LR9101

CMOS IC

LOW NOISE 300mA LDO
REGULATOR

 DESCRIPTION

The UTC LR9101 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 LR9101, 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 LR9101 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 LR9101.

The UTC LR9101 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

* Supply Current: 50µA (Typ.)
* Standby Mode: 0.1µA (Typ.)
* Ripple Rejection: 70dB (Typ.) @f=1kHz,V
*

Well Line Regulation: 0.02%/ V (Typ.)

* CIN=C

be used with this IC

=1µF or more (Ceramic capacitors) are recommended to

OUT

OUT

=2.5V

 ORDERING INFORMATION

Ordering Number

Lead Free Halogen Free
LR9101L-xx-AE5-R LR9101G-xx-AE5-R SOT-23-5 Tape Reel
LR9101L-xx-AL4-R LR9101G-xx-AL4-R SOT-343 Tape Reel
LR9101L-xx-AL5-R LR9101G-xx-AL5-R SOT-353 Tape Reel

Note: xx: Output Voltage, refer to Marking Information.

Package Packing

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LR9101 CMOS IC

 MARKING INFORMATION

PACKAGE VOLTAGE CODE MARKING

SOT-23-5

SOT-353

SOT-343

10: 1.0V
12: 1.2V
18: 1.8V
27: 2.7V
25: 2.5V
28: 2.8V
33: 3.3V

Voltage Code

43

1XX

 PIN CONFIGURATION

SOT-23-5/SOT-353 SOT-343

 PIN DESCRIPTION

PIN NO.

SOT-23-5

SOT-353

1 4 VIN Input Pin
2 2 GND Ground Pin
3 1 CE Chip Enable Pin. Active when this Pin is high.
4 - NC No Connection
5 3 V

SOT-343

PIN NAME DESCRIPTION

Output Pin

OUT

L: Lead Free
G: Halogen Free

21

 BLOCK DIAGRAM

V

IN

V

OUT

-

+

Reference

Voltage

Current Limit

CE

GND

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