Rcaflga_jLmrc
Single-chip Type with built-in FET Switching Regulator Series
Flexible Step-down Switching Regulators wi...
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 overcur...