BD9778HFP

灵活的降压型开关稳压器具有内置功率MOSFET Flexible Step-down Switching Regulators with Built-in Power MOSFET

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

11External synchronization enabled only on the BD9781HFP

12Soft start function : soft start time fixed to 5 ms Typ.

13Built-in overcurrent protection circuit

14Built-in thermal shutdown protection circuit

15High power HRP7 package mounted and BD9781HFP

         Compact SOP8 package mounted BD9778F and BD9001F