ROHM BD9778HFP-TR 直流-直流开关降压逐步递减稳压器, 可调, 7V-35V输入, 1V-35V输出, 2A输出, TO-263-7
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 BD9778HFP and BD9781HFP
Compact SOP8 package mounted BD9778F and BD9001F
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