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BD9778F

Rohm
Part Number BD9778F
Manufacturer Rohm
Description Flexible Step-Down Switching Regulator
Published Jul 30, 2007
Detailed Description Rcaflga_jLmrc Single-chip Type with built-in FET Switching Regulator Series Flexible Step-down Switching Regulators wi...
Datasheet PDF File BD9778F PDF File

BD9778F
BD9778F

Overview
Rcaflga_jLmrc Single-chip Type with built-in FET Switching Regulator Series Flexible Step-down Switching Regulators with Built-in Power MOSFET BD9778F, BD9778HFP, BD9001F, BD9781HFP No.
10027EBT41 Overview The flexible step-down switching regulator controller is a switching regulator controller designed with a high-withstand-voltage built-in POWER MOS FET, providing a free setting function of operating frequency with external resistor.
This switching regulator controller features a wide input voltage range (7 V to 35 V or 7 V to 48 V) and operating temperature range (-40˚C to +125˚C or -40˚C to +95˚C).
Furthermore, an external synchronization input pin (BD9781HFP) enables synchronous operation with external clock.
Features 1) Minimal external components 2) Wide input voltage range: 7 V to 35 V (BD9778F/HFP and BD9781HFP), 7 V to 48 V (BD9001F) 3) Built-in P-ch POWER MOS FET 4) Output voltage setting enabled with external resistor: 1 to VIN 5) Reference voltage accuracy: ±2% 6) Wide operating temperature range: -40˚C to +125˚C (BD9778F/HFP and BD9781HFP), -40˚C to +95˚C (BD9001F) 8) Low dropout: 100% ON Duty cycle 9) Standby mode supply current: 0 µA (Typ.
) (BD9778F/HFP and BD9781HFP), 4 µA (Typ.
) (BD9001F) 10) Oscillation frequency variable with external resistor: 50 to 300 kHz (BD9001F), 50 to 500 kHz (BD9778F/HFP and BD9781HFP) 11) External synchronization enabled (only on the BD9781HFP) 12) Soft start function : soft start time fixed to 5 ms (Typ.
)) 13) Built-in overcurrent protection circuit 14) Built-in thermal shutdown protection circuit 15) High power HRP7 package mounted (BD9778HFP and BD9781HFP) Compact SOP8 package mounted (BD9778F and BD9001F) Applications All fields of industrial equipment, such as Flat TV , printer, DVD, car audio, car navigation, and communication such as ETC, AV, and OA.
Product lineup Item Output current Input range Oscillation frequency range External synchronization Standby function Operating temperature Package BD9778F/HFP 2...


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