bd9876efj ROHM Co. Ltd., bd9876efj Datasheet - Page 8

• Manufacturer Part Number: bd9876efj
• Description: Flexible Step-down Switching Regulator With Built-in Power Mosfet
• Manufacturer: ROHM Co. Ltd.

●Example of Reference Application Circuit (Input 24V, Output 5.0V/ 2.5A)
●Reference Application Data (Example of Reference Application Circuit)
www.rohm.com
5V/2.5A
BD9876EFJ
© 2011 ROHM Co., Ltd. All rights reserved.
100
90
80
70
60
50
40
30
20
10
0
VOUT
0
47µF/15V
GRM32EB31C476KE15 (murata)
Fig.21 Electric Power
500
Fig.24 Load Response Characteristics
Conversion Rate
VCC=42V
LOAD CURRENT[mA]
1000
Fig.26 startup Waveform
1500
VCC=36V
(Io=0A→3.0A)
2000
VCC=24V
VCC=12V
2500
R1
R2
VOUT：200mV/div (AC)
IL：1A/div (DC)
3000
30kΩ
120kΩ
15µH CDRH105R
(SUMIDA)
RB056L-40 (ROHM)
Fig.20 Reference Application Circuit
Fig.22 Frequency Response
C1
R3
Characteristics (Io=0.5A)
EN：5V/div (DC)
LX：10V/div (DC
IL：0.5A/div (DC)
VOUT：2V./div (DC)
6800pF
10kΩ
8/16
Phase
Gain
GND
FB
VC
Lx
Fig.25 Load Response Characteristics
0.01µF
Fig.27 Stop Waveform
(Io=3.0A→0A)
SYNC
VCC
BST
EN
Fig.23 Frequency Response
VOUT：200mV/div (AC)
Characteristics (Io=3.0A)
IL：1A/div (DC)
10µF/35V
GRM31EB3YA106KA12L
(murata)
Phase
Gain
Technical Note
2011.07 - Rev.B
EN：5V/div (DC)
LX：10V/div (DC
IL：0.5A/div (DC)
VOUT：2V./div (DC)
SYNC
EN
VCC 24V
ON/OFF
control