BD9137MUV-E2 ROHM

Datasheet 2.7V to 5.5V , 4A 1ch Synchronous Buck Converter with Integrated FET BD9137MUV General Description Key Specifications BD9137MUV is ROHMs high efficiency step-down Input Voltage Range: 2.7V to 5.5V switching regulator designed to produce a voltage as Output Voltage Range: 0.8V to 3.3V low as 0.8V from a supply voltage of 5.5V/3.3V. It Output Current: 4.0A (Max) offers high efficiency by using pulse skip control Switching Frequency: 1MHz(Typ) technology and synchronous switches, and provides High Side FET ON-Resistance: 82m(Typ) fast transient response to sudden load changes by Low Side FET ON-Resistance: 70m(Typ) implementing current mode control. Standby Current: 0A (Typ) Operating Temperature Range: -40C to +105C Features Fast Transient Response because of Current Mode Package W(Typ) x D(Typ) x H(Max) PWM Control System. High Efficiency for All Load Ranges because of TM Synchronous Switches (Nch/Nch 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 R C 1 f V C CC IN PVCC VCC EN C BST ADJ L V ITH SW OUT GND, PGND R ITH C O C ITH R 2 R 1 Figure 1. Typical Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0J3J0AJ00160-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/22 TSZ22111 14 001 20.Nov.2014 Rev.003 GND ADJ SW ITH PWM TP.1 BD9137MUV (TOP VIEW) Pin Configuration 15 14 13 12 11 TP.2 16 10 VCC 17 9 EN BST 8 18 PGND 19 7 PVCC 20 6 1 2 3 4 5 Figure 2. Pin Configuration Pin Description Pin Pin Pin Pin Function Function No. Name No. Name 1 SW Power switch node 11 GND Ground pin 2 SW Power switch node 12 ADJ Output voltage detection pin GmAmp output pin/connected to phase 3 SW Power switch node 13 ITH compensation capacitor Select SLLM / PWM 4 SW Power switch node 14 PWM (H:PWM mode , L:SLLM & PWM mode) 5 SW Power switch node 15 TP.1 Test pin(connect to GND) 6 PVCC Power switch supply pin 16 TP.2 Test pin(connect to GND) 7 PVCC Power switch supply pin 17 EN Enable pin(Active high 8 PVCC Power switch supply pin 18 PGND Power switch ground pin 9 BST Bootstrapped voltage input pin 19 PGND Power switch ground pin 10 VCC Power supply input pin 20 PGND Power switch ground pin Block Diagram EN VCC VREF BST Current Current 3.3V Sense/ Comp PVCC Input Protect R Q + S + Output SW Gm Amp SLOPE CLK Driver OSC PVCC + Logic VCC UVLO Soft Start TSD GND SLLM SCP select ITH PWM ADJ RITH CITH R 1 R2 Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00160-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/22 TSZ22111 15 001 20.Nov.2014 Rev.003