RT8071CGQW Richtek

RT8071C 3A, 1MHz, Synchronous Step-Down Converter General Description Features High Efficiency : Up to 95% The RT8071C is a high efficiency synchronous, step-down Low R Power Switches : 69m/49m DS(ON) DC/DC converter. Its input voltage ranges from 2.7V to Current Mode Operation 5.5V that provides an adjustable regulated output voltage Fast Transient Response from 0.6V to V while delivering up to 3A of output current. IN Fixed Frequency : 1MHz The internal synchronous low On-resistance power No Schottky Diode Required switches increase efficiency and eliminate the need for Internal Compensation an external Schottky diode. The switching frequency is 0.6V Reference Allows Low Output Voltage fixed internally at 1MHz. The 100% duty cycle provides Low Dropout Operation : 100% Duty Cycle low dropout operation, hence extending battery life in OCP, UVP, OTP portable systems. Current mode operation with internal OpenVReg Type 0-LV Compliant compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT8071C is available in a WDFN-10L 3x3 package. Applications Portable Instruments Ordering Information Battery Powered Equipments RT8071C Notebook Computers Package Type Distributed Power Systems QW : WDFN-10L 3x3 (W-Type) IP Phones Lead Plating System Digital Cameras G : Green (Halogen Free and Pb free) Marking Information Note : 5S= : Product Code Richtek products are : YMDNN : Date Code 5S=YM RoHS compliant and compatible with the current require- DNN ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit RT8071C V VIN SW IN V OUT VCC FB Enable EN PGOOD PGOOD GND Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS8071C-01 June 2015 www.richtek.com 1RT8071C Pin Configurations (TOP VIEW) FB 1 10 EN 9 VCC 2 PGOOD 3 VIN 8 NC GND 4 7 SW 11 GND 5 6 SW WDFN-10L 3x3 Functional Pin Description Pin No. Pin Name Pin Function Feedback Input. This pin receives the feedback voltage from a resistive 1 FB voltage divider connected across the output. Supply Voltage Input. Decouple this pin to GND with at least 1 F ceramic 2 VCC capacitor. 3 VIN Power Input. Decouple this pin to GND with at least 10 F ceramic capacitor. 4, 5, Ground. The exposed pad must be soldered to a large PCB and connected to GND 11 (Exposed Pad) GND for maximum power dissipation. 6, 7 SW Switch Node. Connect this pin to the inductor. 8 NC No Internal Connection. Power Good Indicator. This pin is an open drain logic output. The PGOOD will 9 PGOOD be pulled to ground when the output voltage is less than 90% of the target output voltage. 10 EN Enable Control Input. Pull high the EN pin to turn on the converter. Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS8071C-01 June 2015 2 GND