BD9109FVM-LBTR ROHM

Datasheet Synchronous Buck Converter Integrated FET BD9109FVM-LB General Description Key Specifications This is the product guarantees long time support in Input Voltage Range: 4.5V to 5.5V Industrial market. Output Voltage Range: 3.30V 2% Output Current: 0.8A(Max) ROHMs high efficiency step-down switching regulators Switching Frequency: 1MHz(Typ) (BD9109FVM-LB) is a power supply designed to Pch FET On Resistance: 350m(Typ) produce a low voltage including 3.3 volts from 5 volts Nch FET On Resistance: 250m(Typ) power supply line. Offers high efficiency with our original Standby Current: 0A (Typ) pulse skip control technology and synchronous rectifier. Operating Temperature Range: -25C to +85C Employs a 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 TM (Nch/Pch FET) and SLLM (Simple Light Load Mode) Soft-Start Function. Thermal Protection and ULVO Functions. Short-Current Protection Circuit with Time Delay Function. Shutdown Function Applications Industrial Equipment MSOP8 Power supply for LSI including DSP, Micro computer and ASIC Secondary Power Supply Typical Application Circuit VCC Cin L VCC,PVCC EN SW VOUT VOUT VOUT ITH CO 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 TSZ02201-0J4J0AJ00600-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/20 TSZ22111 14 001 21.Feb.2014 Rev.002BD9109FVM-LB Pin Configuration (Top View) 1 VOUT VCC 8 ITH 2 PVCC 7 3 EN SW 6 4 GND PGND 5 Figure 2. Pin Configuration Pin Description Pin No. Pin Name Function 1 V Output voltage detect pin OUT 2 GmAmp output pin/Connected phase compensation capacitor ITH 3 EN Enable pin(Active High) 4 GND Ground 5 PGND Nch FET source pin 6 SW Pch/Nch FET drain output pin 7 PV Pch FET source pin CC 8 V V power supply input pin CC CC Block Diagram EN 3 VCC 8 VREF 7 PVCC Current Comp. Current R Q Sense/ Protect Gm Amp. S SLOPE CLK + 6 OSC VCC SW Driver UVLO Logic PGND Soft 5 Start TSD 4 SCP GND 1 2 V ITH OUT Figure 3. Block Diagram www.rohm.com TSZ02201-0J4J0AJ00600-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/20 TSZ22111 15 001 21.Feb.2014 Rev.002