BD9329AEFJ Datasheet, PDF (7/16 Pages) Rohm – Simple Step-down Switching Regulator with Built-in Power MOSFET

BD9329AEFJ
Technical Note
VOUT
VOUT-MAX: +48mV
VOUT-MIN: -22m V
VOUT: 50 mV / Div
IOUT
IOUT: 1.0 A / Div
VOUT
Δ: 28.4 mV
VOUT: 10.0 mV / Div
IOUT: 1.0 A / Div
IOUT
Fig.13 Transient Response
(VIN= 12V VOUT= 3.3V L= 10µH Cout =22µF Iout= 0.2-1.0A )
Fig.14 Output Ripple Voltage
(VIN= 12V VOUT= 3.3V L= 10µH Cout =22µF I out= 1.0A )
VOUT
VOUT-MAX: +120mV
VOUT-MIN: -42mV
VOUT: 100 mV / Div
IOUT
IOUT: 1.0 A / Div
VOUT
Δ:28.8 mV
IOUT
VOUT: 10.0 mV / Div
IOUT: 1.0 A / Div
Fig.15 Transient Response
(VIN= 12V VOUT= 3.3V L= 10µH Cout =22µF Iout= 0.2-3.0A)
EN
VOUT
TSS
22ms
Fig.16 Output Ripple Voltage
(VIN= 12V VOUT= 3.3V L= 10µH Cout =22µF I out= ３.0A )
EN: 10V / Div
VOUT: 1.0V / Div
IOUT
IOUT: 1.0 A / Div
Fig.17 Start Up waveform
(VIN= 12V VOUT= 3.3V L= 10µH CSS= 0.1µF)
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2011.02 - Rev.A