Datasheet 4.5V to 13.2V, 2A 1ch Synchronous Buck Converter with Integrated FET BD9141MUV General Description Key Specifications The BD9141MUV is ROHMs high efficiency Input Voltage Range: 4.5V to 13.2V step-down switching regulator designed to produce a Output Voltage Range: 2.5V to 6.0V low voltage including 5.0V/3.3V from 2 lithium cell Output Current: 2.0A(Max) power supply line. It offers high efficiency by using Switching Frequency: 500KHz(Typ) pulse skip control technology and synchronous Pch FET ON-Resistance: 150m (Typ) switches, and provides fast transient response to Nch FET ON-Resistance: 80m (Typ) sudden load changes by implementing current mode Standby Current: 0A (Typ) control. Operating Temperature Range: -40C to +105C Features Package W(Typ) x D(Typ) x H(Max) Fast Transient Response because of Current Mode PWM Control System High Efficiency for All Load Ranges because of TM Synchronous Rectifier (Nch/Pch FET) and SLLM (Simple Light Load Mode) Soft-Start Function Thermal Shutdown and UVLO Functions Short-Circuit Protection with Time Delay Function Shutdown Function Applications Power Supply for LSI including DSP, Microcomputer and ASIC VQFN020V4040 4.00mm x 4.00mm x 1.00mm Typical Application Circuit L V CC C IN VCC,PVCC EN V SW OUT C O ADJ R2 ITH GND,PGND R ITH R1 C ITH Figure 1. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0J3J0AJ00180-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/22 TSZ2211114001 04.Jun.2015 Rev.003 GND ADJ ITH VREG N.C. DDatasheetatasheet BD9141MUV Pin Configuration (TOP VIEW) 15 14 13 12 11 16 N.C. 10 VCC EN 17 9 N.C. 18 8 PGND PVCC 19 7 20 6 12 345 SW Figure 2. Pin Configuration Pin Description Pin No. Pin Name Pin Function 1,2,3,4,5 SW Power switch node 6,7,8 PVCC Power switch supply pin 9 N.C. No connection 10 VCC Power supply input pin 11 GND Ground pin 12 ADJ Output voltage detection pin 13 ITH GmAmp output pin/connected to phase compensation capacitor 14 VREG Reference voltage 15,16 N.C. No connection 17 EN Enable pin(Active High) 18,19,20 PGND Power switch ground pin Block Diagram V CC VCC PVCC VCC R C ITH ITH R 2 R 1 Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00180-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/22 TSZ2211115001 04.Jun.2015 Rev.003