BD9111NV-E2 ROHM

Datasheet 4. 5V to 5.5V, 2.0A 1ch Synchronous Buck Converter with Integrated FET BD9111NV General Description Key Specifications The BD9111NV is ROHMs 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 pulse skip control technology and Switching Frequency: 1MHz(Typ) synchronous switches, and provides fast transient Pch FET ON Resistance: 200m(Typ) response to sudden load changes by implementing Nch FET ON Resistance: 150m(Typ) current mode control. Standby Current: 0A (Typ) Operating Temperature Range: -25C 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 Synchronous Switches (Nch and Pch FET) and TM 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 SON008V5060 5.00mm x 6.00mm x 1.00mm Typical Application Circuit L CIN V CC VCC,PVCC EN SW V OUT V VOUT OUT C O ITH GND,PGND RITH CITH Figure 1. Typical Application Circuit Product structure Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J3J0AJ00100-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/21 TSZ22111 14 001 02.Oct.2014 Rev.002 Datasheet BD9111NV Pin Configuration (TOP VIEW) Figure 2. Pin Configuration Pin Description Pin No. Pin Name Pin Function 1 VOUT Output voltage pin 2 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 VVCC CC EN 8 VCC VCC 2 VREF 5V Input 7 Current PVCC PVCC 22F Current Comp Sense/ R Q Protect S + Output 2.2H Gm Amp. SLOPE C LK 6 Driver OSC Logic SW CC VCV C 22 F UVLO Soft 5 Start TSD PGND SCP 4 GND 3 1 ITH VOUT R ITH C ITH Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00100-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/21 TSZ22111 15 001 02.Oct.2014 Rev.002