LR9273 datasheet(8/9 Pages) UTC

Part #	LR9273

Description	SUPER LOW ON RESISTANCE/LOW VOLTAGE 1A LDO REGULATOR

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Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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8 / 9 page

LR9273

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

8 of 9

www.unisonic.com.tw

QW-R502-A30.a



TYPICAL APPLICATION CIRCUIT

Example of the Typical Application of UTC LR9273 (Fixed Output Type)

Phase Compensation

In these ICs, phase compensation is made with the output capacitor for securing stable operation even if the load

current is varied. For this purpose, use as much as a capacitor as C2. Recommendation value is as follows:

Mounting on PCB

Make VDD and GND lines sufficient. If their impedance is high, a current flows, the noise picked up or unstable

operation may result. Further use a 4.7μF or more value capacitor between VDD pin and GND pin as close as

possible.

Set an Output capacitor between VOUT pin and GND pin for phase compensation as close as possible.

Technical Notes on Output Voltage Setting of Adjustable Output type

VOUT

ADJ

GND

I2

I3

1.0V

R3

IIC

RIC

R2

VOUT

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