BU90002GWZ_11 Datasheet, PDF (11/14 Pages) Rohm – Output 1.0A High-efficiency Step-down Switching regulators with Built-in Power MOSFET

BU90002GWZ, BU90003GWZ, BU90004GWZ, BU90005GWZ, BU90006GWZ
Technical Note
●Description of operations
1) Shutdown
If the EN input pin set to low (<0.4V), all circuit are shut down and the regulator is standby mode.
Do not leave the EN pin floating.
2) Soft start function
The regulator has a soft start circuit that reduces in-rush current at start-up. Typical start up times with a 4.7uF output capacitor
is 120usec.
3) Current limit
The BU9000XGWZ has a current limit circuit that protects itself and external components during overload condition.
4) UVLO
The BU9000XGWZ has a Under Voltage Lock Out circuit that turn off device when VIN>2.05V(typ.)
5) FORCED PWM MODE
Setting MODE pin high (>1.4V) places the regulator in forced PWM.
6) TSD
The BU9000XGWZ has a thermal shutdown feature to protect the device if the junction temperature exceeds 150℃.In thermal
shutdown, the DRIVER is disabled.
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11/14
Target spec. ver.1.7