BD8960NV_10 Datasheet, PDF (5/15 Pages) Rohm – Low Noise High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD8960NV
Technical Note
●Information on advantages
Advantage 1：Offers fast transient response with current mode control system.
Conventional product (Load response IO=0.1A→0.6A)
BD8960NV (Load response IO=1A→2A)
VOUT
110mV
VOUT
29mV
IOUT
IOUT
Voltage drop due to sudden change in load was reduced by about 50%.
Fig.17 Comparison of transient response
Advantage 2： Offers high efficiency with synchronous rectifier
Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs
incorporated as power transistor.
ON resistance of P-channel MOS FET : 200mΩ(Typ.)
ON resistance of N-channel MOS FET : 160mΩ(Typ.)
100
90
80
70
60
50
40
30
20
10
0
10
【VOUT=1.2V】
VCC=3.3V
Ta=25℃
100
1000
OU TPU T C U R R EN T:IOU T[mA]
Fig.18 Efficiency
10000
Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.
・Output capacitor Co required for current mode control: 22μF ceramic capacitor
・Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor
Reduces a mounting area required.
VCC
DC/DC
Convertor
Controller
RITH
CITH
Cin
L
VOUT
Co
15mm
CIN
RITH
L
10mm
CITH
CO
Fig.19 Example application
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5/14
2010.04 - Rev.B