®
RT5771C
3A, 1MHz, Synchronous Step-Down Converter
General Description
Features
High Efficiency : Up to 95%
The RT5771C is a high efficiency synchronous, step-down
DC-DC converter. Its input voltage ranges from 2.7V to
5.5V that provides an adjustable regulated output voltage
from 0.6V to VIN while delivering up to 3A of output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The switching frequency is
fixed internally at 1MHz. The 100% duty cycle provides
low dropout operation, hence extending battery life in
portable systems. Current mode operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output capacitors.
The RT5771C is available in a WDFN-10L 3x3 package.
Low RDS(ON) Power Switches : 69mΩ/49mΩ
Current Mode Operation
Forced-PWM (FPWM) Mode
Fast Transient Response
Fixed Frequency : 1MHz
No Schottky Diode Required
Internal Compensation
0.6V Reference Allows Low Output Voltage
Low Dropout Operation : 100% Duty Cycle
OCP, UVP, OTP
OpenVReg Type 0-LV Compliant
Applications
Ordering Information
Portable Instruments
Battery Powered Equipments
Notebook Computers
Distributed Power Systems
IP Phones
RT5771C
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Digital Cameras
Note :
Richtek products are :
Pin Configuration
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.
(TOP VIEW)
1
2
3
4
5
10
9
EN
PGOOD
NC
SW
FB
VCC
VIN
GND
GND
8
7
Marking Information
11
6
SW
M2= : Product Code
WDFN-10L 3x3
YMDNN : Date Code
M2=YM
DNN
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS5771C-02 June 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
