BD2201GUL(2011) データシートの表示（PDF） - ROHM Semiconductor
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BD2201GUL Datasheet PDF : 10 Pages
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BD2200GUL, BD2201GUL
Technical Note
●Operation Description
1. Switch operation
Each VIN and VOUT pins are connected to MOSFET’s drain and source. By setting EN input to High level, the internal
charge pump operates and turns on MOSFET.
When MOSFET is turned on, the switch becomes bidirectional characteristics. Consequently, in case of VIN < VOUT, the
current is flowing from VOUT to VIN.
2. Output discharge circuit
Discharge circuit operates when switch is off. When discharge circuit operates, 70Ω (Typ.) resistor is connected between
VOUT pin and GND pin. This discharges the electrical charge quickly.
VIN
EN
VOUT
Discharge circuit ON OFF ON OFF
ON
Fig.27 Operation timing
●Application Circuit Example
●Power Dissipation Characteristics
700
VIN VOUT
VIN VOUT
ON/OFF
EN
GND
VIN
600
500
LOAD
400
300
Fig.28 Application circuit example
**This application circuit does not guarantee its operation.
When using the circuit with changes to the external circuit constants,
make sure to leave an adequate margin for external components including
static and transitional characteristics as well as dispersion of the IC.
200
100
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE : Ta [℃]
Fig.29 Power dissipation curve (Pd-Ta Curve)
(VCSP50L1 package)
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© 2011 ROHM Co., Ltd. All rights reserved.
7/9
2011.02 - Rev.A
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