UNISONIC TECHNOLOGIES CO., LTD

P2680

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 5

Copyright © 2014 Unisonic Technologies Co., Ltd

QW-R502-A32.b

WIDE INPUT 2A

SYNCHRONOUS RECTIFIED

STEP-DOWN CONVERTER



DESCRIPTION

The UTC P2680 is a monolithic synchronous step-down, fixed

340kHz frequency, current-mode, PWM controller with an internal

power MOSFET. It achieves 2A continuous output current over a

wide input supply range from 4V to 26V with excellent load and line

regulation. Equipped with an external compensation pin, this device

offers user flexibility in determining loop dynamic.

Current mode control provides fast transient response and

cycle-by-cycle current limit. A PWM control circuit can provide the

duty ratio from 0 up to 90% linearly. An Under-Voltage-Lock-Output

(UVLO) circuit monitors the VIN supply voltage to prevent wrong

logic controls.

Additional under voltage protections monitor the

voltage on FB pin for short-circuit protections.

In application, the UTC P2680 is suitable for portable devices

when it works as an ideal power supply in SOP-8L package.



FEATURES

* 2A Output Current

*340KHz frequency of operation

* 4V~26V Input Voltage Range

* 20μA Shutdown Supply Current

* Output Adjustable

* Frequency FoldBack at Short Circuit

* VIN Under-voltage Lockout

* Thermal Shutdown

* OCP

* Programmable Soft-Start

* Up to 90% Efficiency

HSOP-8



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

P2680L-SH2-R

P2680G-SH2-R

HSOP-8

Tape Reel

P2680L-SH2-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel

(2) SH2: HSOP-8

(3) L: Lead Free, G: Halogen Free

(3)Lead Free