BD9104FVM-TR ROHM

4.0V(or 4.5V) to 5.5V, 0.8A 1ch Synchronous Buck Converter Integrated FET BD9102FVM BD9104FVM General Description Key Specifications The BD9102FVM and BD9104FVM are ROHMs high Input Voltage Range efficiency step-down switching regulator designed to BD9102FVM: 4.0V to 5.5V produce a voltage as low as 1.24V from a supply BD9104FVM: 4.5V to 5.5V voltage of 5V. Offers high efficiency with our original Output Voltage Range pulse skip control technology and synchronous BD9102FVM: 1.24V 2% rectifier. It offers high efficiency by using synchronous BD9104FVM: 3.30V 2% switches and provides fast transient response to Output Current: 0.8A(Max) sudden load changes by implementing current mode Switching Frequency: 1.0MHz(Typ) control. Pch FET ON-Resistance: 350m(Typ) Nch FET ON-Resistance: 250m(Typ) Standby Current: 0A(Typ) Features Operating Temperature Range: -25C to +85C Fast Transient Response Because of Current Mode PWM Control System. Highly Efficient for All Load Ranges Because of Package W(Typ) x D(Typ) x H(Max) TM Synchronous Rectifier (Nch/Pch FET) and SLLM (Simple Light Load Mode) Soft-Start Function. Thermal Protection and UVLO Functions. Short-Circuit Protection with Time Delay Function. Shutdown Function Applications Power supply for HDD, portable electronic devices like PDA, and LSI including CPU and ASIC. MSOP8 Typical Application Circuit 2.90 mm x 4.00 mm x 0.90 mm Figure 1. Typical Application Circuit Lineup UVLO Threshold Orderable Input Voltage Range Output Voltage Range Voltage Package Part Number (Typ) 4.0V to 5.5V 1.24V2% 2.7V MSOP8 Reel of 3000 BD9102FVM-TR 4.5V to 5.5V 3.30V2% 4.1V MSOP8 Reel of 3000 BD9104FVM-TR Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J3J0AJ00340-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/25 TSZ2211114001 24.Oct.2013 Rev.003 BD9102FVM BD9104FVM Pin Configuration BD9102FVM BD9104FVM (TOP VIEW) 1 VOUT VCC 8 2 ITH PVCC 7 3 EN SW 6 GND PGND 4 5 Figure 2. Pin Configuration Pin Description Pin No. Pin Name Function 1 VOUT Output voltage detect 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 PVCC VCC VOUT Figure 3. BD9102FVM/ BD9104FVM Block Diagram www.rohm.com TSZ02201-0J3J0AJ00340-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/25 TSZ2211114001 24.Oct.2013 Rev.003