Datasheet 4.5V to 5.5V , 2.0A 1ch Synchronous Buck Converter with Integrated FET BD8961NV General Description Key Specification The BD8961NV is ROHM s high efficiency step-down Input Voltage Range: 4.5V to 5.5V switching regulator designed to produce a voltage as Output Voltage: 3.3V(Typ) low as 3.3V from a supply voltage of 5V. It offers high Output Current: 2.0A (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: 200m(Typ) implementing current mode control. Nch FET ON-Resistance: 150m(Typ) Standby Current: 0A (Typ) Operating Temperature Range: -25C to +105C Features Fast Transient Response because of Current Mode Control System Package W(Typ) x D(Typ) x H(Max) High Efficiency for All Load Ranges because of Synchronous Switches (Nch/Pch FET) 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 SON008V5060 5.00mm x 6.00mm x 1.00mm Typical Application Circuit CIN L VCC VCC,PVCC SW EN VOUT VOUT VOUT Fig.37 CO ITH GND,PGND R ITH 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 TSZ02201-0J3J0AJ00020-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/21 TSZ22111 14 001 02.Oct.2014 Rev.002 Datasheet BD8961NV Pin Configuration TOP VIEW 8 EN VOUT 1 8 VCC 2 7 PVCC 3 6 SW ITH GND 4 5 PGND Figure 2. Pin Configuration Pin Description Pin No. Pin Name Pin Function 1 VOUT Output voltage pin 2 VCC VCC power supply input pin 3 ITH GmAmp output pin/connected phase compensation capacitor 4 GND Ground pin 5 PGND Nch FET source pin 6 SW Pch/Nch FET drain output pin 7 PVCC Pch FET source pin 8 EN Enable pin (Active High) Block Diagram VCC PVCC VCC Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00020-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/21 02.Oct.2014 Rev.002 TSZ22111 15 001