BD9161FVM-LBTR ROHM

Datasheet 2.5V to 4.5V, Input 0.6A Integrated FET 1ch Synchronous Buck Converter BD9161FVM-LB General Description Key Specifications This is the product guarantees long time support in Input Voltage Range: 2.5V to 4.5V Industrial market. Output Voltage Range: 1.0V to 3.3V Output Current: 0.6A(Max) ROHMs high efficiency step-down switching regulator Switching Frequency: 1MHz(Typ) BD9161FVM-LB is a power supply designed to produce Pch FET On Resistance: 0.35(Typ) 1.2volts (low voltage) from 3.3volts power supply line. Nch FET On Resistance: 0.37(Typ) Offers high efficiency with our original pulse skip control Standby Current: 0A (Typ) technology and synchronous rectifier. Employs a Operating Temperature Range: -25C to +85C current mode control system to provide faster transient response to sudden change in load. Package W(Typ) x D(Typ) x H(Max) MSOP8 2.90mm x4.00mm x 0.90mm Features Long Time Support Product for Industrial Applications. Fast Transient Response with Current Mode PWM Control System. Highly Efficiency with Synchronous Rectifier. (Nch/Pch FET) 100% Duty Ratio. Soft-Start Function. Thermal Protection and ULVO Functions. Short-Current Protection Circuit with Time Delay Function. Shutdown Function. Applications MSOP8 Industrial Equipment Power Supply for HDD, DVD and CPU, ASIC Secondary Power Supply Typical Application Circuit V CC Cin L V ,PV CC CC EN SW V OUT ITH C O GND,PGND ADJ 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 TSZ02201-0J4J0AJ00580-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/20 TSZ22111 14 001 21.Feb.2014 Rev.002BD9161FVM-LB Pin Configuration (TOP VIEW) Figure 2. Pin Configuration Pin Description Pin No. Pin Name Function 1 Output voltage Feedback pin (Adjustable) ADJ 2 GmAmp output pin/Connected phase compensation capacitor ITH 3 EN Enable pin (Active High) 4 Ground GND 5 PGND Nch FET source pin 6 Pch/Nch FET drain output pin SW 7 PV Pch FET source pin CC 8 V power supply input pin V CC CC Block Diagram Enable EN 3 V CC 8 V REF 3.3V 7 Input PV CC Current Comp. Current R Q Sense/ Protect Gm Amp. S Output SLOPE CLK + 6 OSC V SW CC Driver UVLO Logic PGND Soft 5 Start TSD 4 SCP GND 1 2 ADJ ITH Figure 3. Block Diagram www.rohm.com TSZ02201-0J4J0AJ00580-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/20 TSZ22111 15 001 21.Feb.2014 Rev.002