BD8961NV ROHM Co. Ltd., BD8961NV Datasheet - Page 4

• Manufacturer Part Number: BD8961NV
• Description: Low Noise Step-down Switching Regulator
• Manufacturer: ROHM Co. Ltd.

●Information on advantages
Advantage 1：Offers fast transient response with current mode control system.
Advantage 2： Offers high efficiency with synchronous rectifier
Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.
R
C
・For heavier load:
ITH
ITH
Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs
incorporated as power transistor.
V
Conventional product (Load response I
I
OUT
OUT
ON resistance of P-channel MOS FET : 200mΩ(Typ.)
ON resistance of N-channel MOS FET : 160mΩ(Typ.)
Reduces a mounting area required.
Convertor
Controller
DC/DC
Voltage drop due to sudden change in load was reduced by about 50%.
V
CC
L
Cin
Fig.18 Comparison of transient response
・Output capacitor Co required for current mode control: 22μF ceramic capacitor
・Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor
Co
160mV
O
V
Fig.20 Example application
=0.1A→0.6A)
OUT
4/15
V
I
OUT
OUT
BD8961NV (Load response I
10mm
R
C
ITH
ITH
15mm
C
C
IN
O
100
90
80
70
60
50
40
30
20
10
0
10
L
OUTPUT CURRENT:I
O
Fig.19 Efficiency
=1A→2A)
100
100mV
VCC=5V
1000
OUT
[mA]
10000