BD9134MUV-E2 ROHM

Datasheet 4. 5V to 5.5V, 3.0A 1ch Synchronous Buck Converter with Integrated FET BD9134MUV General Description Key Specifications BD9134MUV is ROHMs high efficiency step-down Input Voltage Range: 4.5V to 5.5V switching regulator designed to provide a voltage as Output Voltage Range: 3.25V to 3.35V low as 3.3V from a supply voltage of 5V. It offers high Output Current: 3.0A(Max) efficiency by using pulse skip control technology and Switching Frequency: 1MHz(Typ) synchronous switches, and provides fast transient (Typ) High side FET ON-Resistance: 82m response to sudden load changes by implementing Low side FET ON-Resistance: 70m(Typ) 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 C R 1 f V C CC IN PVCC VCC EN C BST V OUT L V ITH SW OUT GND, PGND R ITH C O C ITH Figure 1. Typical Application Circuit Product structure Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0J3J0AJ00150-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/21 TSZ22111 14 001 03.Oct.2014 Rev.002 BD9134MUV Pin Configuration (TOP VIEW) GND N.C. ITH VOUT 15 14 13 12 11 N.C. 16 VCC 10 EN 17 9 BST 8 18 PGND 19 7 PVCC 6 20 1 2 3 4 5 SW 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 VOUT Output voltage detection pin GmAmp output pin/connected to phase 3 SW Power switch node 13 ITH compensation capacitor 4 SW Power switch node 14 N.C. No connection 5 SW Power switch node 15 N.C. No connection 6 PVCC Power switch supply pin 16 N.C. No connection Power switch supply pin 7 PVCC 17 EN Enable pin(Active high 8 PVCC Power switch supply pin 18 PGND Power switch ground pin Power switch ground pin 9 BST Bootstrapped voltage Input pin 19 PGND Power switch ground pin 10 VCC Power supply input pin 20 PGND Block Diagram VCC EN VCC VREF BST Current 5V Current Comp PVCC Input Sense/ Protect R Q + S + Output SW Gm Amp CLK SLOPE Driver OSC Logic PVCC + VCC PGND UVLO Soft Start TSD GND SCP ITH VOUT RITH CITH Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00150-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/21 TSZ22111 15 001 03.Oct.2014 Rev.002