RT7255

Copyright © 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS7255-00

June

2015

www.richtek.com

1

General Description

The RT7255 is a synchronous step-down converter

response with few external components. The low

impedance internal MOSFET supports high efficiency

operation with wide input voltage range from 4.3V to

18V. The proprietary circuit of the RT7255 supports all

ceramic capacitors.

The output voltage can be adjusted between 0.6V and

8V.

Ordering Information

RT7255

Package Type

V8 : SOT-23-8

Lead Plating System

G : Green (Halogen Free and Pb Free)

A : Hiccup + PSM

B : Non-UVP + PSM

C : Hiccup + PWM

D : Non-UVP + PWM

Note :

Richtek products are :



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for use in SnPb or Pb-free soldering processes.

Features



4.3V to 18V Input Voltage Range



Adjustable Soft-Start Time



PGOOD Function



1.5A Output Current



Advanced Constant On-Time Control



Fast Transient Response



Support All Ceramic Capacitors



Up to 95% Efficiency



500kHz Switching Frequency



Adjustable Output Voltage from 0.6V to 8V



Cycle-by-Cycle Current Limit



Input Under-Voltage Lockout



Hiccup Mode Under-Voltage Protection



Thermal Shutdown

Applications



Industrial and Commercial Low Power Systems



Computer Peripherals



LCD Monitors and TVs



Green Electronics/Appliances



Point of Load Regulation for High-Performance

DSPs, FPGAs, and ASICs

Simplified Application Circuit

PGOOD

RT7255

FB

BOOT

L

SW

SS

R2

VIN

R1

EN

GND

Enable

5V