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RT5771B

Richtek
Part Number RT5771B
Manufacturer Richtek
Description Synchronous Step-Down Converter
Published Mar 19, 2020
Detailed Description ® RT5771B 3A, 1MHz, Synchronous Step-Down Converter General Description The RT5771B is a high efficiency synchronous,...
Datasheet PDF File RT5771B PDF File

RT5771B
RT5771B

Overview
® RT5771B 3A, 1MHz, Synchronous Step-Down Converter General Description The RT5771B 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 RT5771B is available in a WDFN-10L 3x3 package.
Ordering Information RT5771B Package Type QW : WDFN-10L 3x3 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) 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.
Marking Information M3=YM DNN M3= : Product Code YMDNN : Date Code Features  High Efficiency : Up to 95%  High Efficiency at Light Load  Low RDS(ON) Power Switches : 69mΩ/49mΩ  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 Applications  Portable Instruments  Battery Powered Equipment  Notebook Computers  Distributed Power Systems  IP Phones  Digital Cameras Pin Configuration (TOP VIEW) FB 1 VCC 2 VIN 3 GND 4 GND 5 GND 10 EN 9 PGOOD 8 NC 7 SW 11 6 SW WDFN-10L 3x3 Copyright ©2019 Richtek Technology Corporation.
All rights reserved.
DS5771B-01 June 2019 is a registered trademark of Richtek Technology Corporation.
www.
richtek.
com 1 RT5771B Typical Application Circuit VIN PGOOD Chip Enable CIN 10µF R3 100k L RT5771B 1.
5µH 3 VIN SW 6, 7 ...


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