UNISONIC TECHNOLOGIES CO., LTD

UC621XX

CMOS IC

www.unisonic.com.tw

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Copyright © 2005 Unisonic Technologies Co., Ltd

QW-R502-028,B

BOOSTING VOLTAGE

REGULATORS

DESCRIPTION

The UTC UC621XX is a positive output voltage regulator that can

supply up to 1A of output current using an external transistor. Low

power and high accuracy are achieved through CMOS process and

metal fuses trimming technologies.

The series consists of a high precision voltage reference, an error

correction circuit and a short-circuit protected output driver.

In stand-by mode, supply current can be dramatically cut. Since

the input-output voltage differential is small, loss control efficiency is

good.

The UTC UC621XX is particularly suited for use with battery

operated portable products, and products where supply current

regulation is required.

FEATURES

* Ultra Small Input-Output Voltage Differential

: 100mA of output current is available with a differential of 0.1V.

(Performance depends on the external transistor characteristics.)

* Maximum Output Current : 1A

* Output Voltage Range : 2V ~ 6V in 0.1V increments

* Highly Accurate : Set-up voltage ±2%

: Typ.0.2µA (Stand-by)

* Output Voltage Temperature Characteristics: Typ. ±100ppm/℃

* Input Stability : Typ.0.1%/V

SOT-25

4

5

3

2

1

*Pb-free plating product number: UC621XXL

ORDERING INFORMATION

Order Number

Normal

Lead Free Plating

Package

Packing

UC621xx-AF5-R

UC621xxL-AF5-R

SOT-25

Tape Reel

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

UC621xxL-AF5-R

(1)Packing Type

(2)Package Type

(4)Output Voltage Code

(3)Lead Plating

(1) R: Tape Reel

(2) AF5: SOT-25

(4) xx: refer to Marking Information

(3) L: Lead Free Plating, Blank: Pb/Sn