Datasheet 4.0V to 5.5V, 1.2A 1ch Synchronous Buck Converter with Integrated FET BD8964FVM General Description Key Specifications The BD8964FVM is ROHMs high efficiency step-down Input Voltage Range: 4.0V to 5.5V switching regulator designed to produce a voltage as Output Voltage Range: 1.0V to 1.8V low as 1V from a supply voltage of 5V. It offers high Output Current: 1.2A (Max) efficiency by using synchronous switches and provides Switching Frequency: 1.0MHz (Typ) fast transient response to sudden load changes by Pch FET ON-Resistance: 350m (Typ) implementing current mode control. Nch FET ON-Resistance: 250m (Typ) Standby Current: 0A (Typ) Operating Temperature Range: -25C to +85C Features Fast Transient Response because of Current Mode PWM Control System Package W(Typ) x D(Typ) x H(Max) High Efficiency for All Load Ranges with Synchronous Rectifier (Nch/Pch FET) Soft-Start Function Thermal Shutdown and UVLO Functions Short-Circuit Protection with Time Delay Function Shutdown Function Application Power Supply for LSI including DSP, Microcomputer and ASIC MSOP8 2.90 mm x 4.00 mm x 0.90 mm Typical Application Circuit C L IN V CC VCC,PVCC EN SW VOUT ADJ R 2 CO ITH GND,PGND R 1 R ITH C ITH Figure 1. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J3J0AJ00050-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/21 22.Jan.2015 Rev.003 TSZ2211115001 Datasheet BD8964FVM Pin Configuration (TOP VIEW) 1 8 VCC ADJ ITH 2 7 PVCC 3 6 SW EN GND 4 5 PGND MSOP8 Figure 2. Pin Configuration Pin Description Pin No. Pin Name Function 1 ADJ Output voltage detection pin 2 ITH GmAmp output pin/connected to phase compensation capacitor 3 EN Enable pin (Active High) 4 GND Ground pin 5 PGND Power switch ground pin 6 SW Power switch node 7 PVCC Power switch supply pin 8 VCC Power supply input pin Block Diagram VCC VREF PVCC VCC Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00050-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/21 TSZ2211115001 22.Jan.2015 Rev.003