RT8070
®
DS8070-08 February 2015 www.richtek.com
1
©
Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Applications
LCD TV and Monitor
Notebook Computers
Distributed Power Systems
IP Phones
Digital Cameras
General Description
The RT8070 is a high efficiency synchronous, step-down
DC/DC converter. Its input voltage range is from 2.7V to
5.5V and provides an adjustable regulated output voltage
from 0.8V to 5V while delivering up to 4A of output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The default switching
frequency is set at 2MHz, if the RT pin is left open. It can
also be varied from 200kHz to 2MHz by adding an external
resistor. Current mode operation with external
compensation allows the transient response to be
optimized over a wide range of loads and output capacitors.
Ordering Information
4A, 2MHz, Synchronous Step-Down Converter
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
High Efficiency : Up to 95%
Adjustable Frequency : 200kHz to 2MHz
No Schottky Diode Required
0.8V Reference Allows Low Output Voltage
Low Dropout Operation : 100% Duty Cycle
Enable Function
External Soft-Start
Power Good Function
RoHS Compliant and Halogen Free
RT8070ZSP : Product Number
YMDNN : Date Code
RT8070ZSP
Marking Information
RT8070
ZSPYMDNN
25 YM
DNN
RT8070ZQW
25 : Product Code
YMDNN : Date Code
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
QW : WDFN-8L 3x3 (W-Type)
RT8070
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
