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BD9778HFP Datasheet(Hoja de datos) 1 Page - Rohm

No. de Pieza. BD9778HFP
Descripción  Flexible Step-down Switching Regulators with Built-in Power MOSFET
Descarga  17 Pages
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Fabricante  ROHM [Rohm]
Página de inicio  http://www.rohm.com
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Single-chip Type with built-in FET Switching Regulator Series
Flexible Step-down
Switching Regulators
with Built-in Power MOSFET
BD9778F, BD9778HFP, BD9001F, BD9781HFP
2010.02 -
Rev. B
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
No.10027EBT41
Overview
Features
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Minimal external components
Wide input voltage range: 7 V to 35 V (BD9778F/HFP and BD9781HFP), 7 V to 48 V (BD9001F)
Built-in P-ch POWER MOS FET
Output voltage setting enabled with external resistor: 1 to VIN
Reference voltage accuracy: ±2%
Wide operating temperature range: -40˚C to +125˚C (BD9778F/HFP and BD9781HFP),
-40˚C to +95˚C (BD9001F)
Low dropout: 100% ON Duty cycle
Standby mode supply current: 0 µA (Typ.) (BD9778F/HFP and BD9781HFP), 4 µA (Typ.) (BD9001F)
Oscillation frequency variable with external resistor: 50 to 300 kHz (BD9001F),
50 to 500 kHz (BD9778F/HFP and BD9781HFP)
External synchronization enabled (only on the BD9781HFP)
Soft start function : soft start time fixed to 5 ms (Typ.))
Built-in overcurrent protection circuit
Built-in thermal shutdown protection circuit
High power HRP7 package mounted (BD9778HFP and BD9781HFP)
Compact SOP8 package mounted (BD9778F and BD9001F)
All fields of industrial equipment, such as Flat TV , printer, DVD, car audio, car navigation,
and communication such as ETC, AV, and OA.
Applications
Product lineup
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.
BD9778F/HFP
2A
7V ~ 35V
50 ~ 500kHz
Not provided
Provided
-40˚C ~ +125˚C
SOP8 / HRP7
Output current
Input range
Oscillation frequency range
External synchronization
Standby function
Operating temperature
Package
BD9001F
2A
7V ~ 48V
50 ~ 300kHz
Not provided
Provided
-40˚C ~ +95˚C
SOP8
BD9781HFP
4A
7V ~ 35V
50 ~ 500kHz
Provided
Provided
-40˚C ~ +125˚C
HRP7
Item




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