UNISONIC TECHNOLOGIES CO., LTD

L1803

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2015 Unisonic Technologies Co., Ltd

QW-R102-058.c

1.5A ULTRA LOW DROPOUT

LINEAR REGULATOR WITH

PROGRAMMABLE

SOFT-START



DESCRIPTION

The UTC L1803 is a typical LDO that features a

user-programmable soft-start, very low dropout voltage as low as

0.15V at output current 1.5A, an enable input and a power-good

output.

The soft-start reduces inrush current of the load capacitors and

minimizes stress on the input power source during start-up. An

enable pin to further reduce power dissipation while shutdown. And

power-good output indicates the output voltage status.

The UTC L1803 is stable with any type of output capacitor of

2.2µF or more. A precision reference and feedback control deliver

2% accuracy over load, line, and operating temperature ranges.



FEATURES

* 2% output Voltage

* Power-Good (PG) output

* Programmable soft-start provides linear voltage startup

* Stable with any output capacitor≥2.2µF



ORDERING INFORMATION

Ordering Number

Package

Packing

L1803G-SH2-R

HSOP-8

Tape Reel

L1803G-K10-3030-R

DFN-10(3×3)

Tape Reel

L1803G-SH2-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel

(2) SH2: HSOP-8, K10-3030: DFN-10(3×3)

(3) G: Halogen Free and Lead Free

(3)Green Package