BD9141MUV Datasheet, PDF (3/19 Pages) Rohm – Output 2A or More High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9141MUV
Technical Note
●Block Diagram, Application Circuit
【BD9141MUV】
4.0±0.1
D9141
Lot No.
S
0.08 S
C0.2 ^2.1±0.1
1
5
20
6
16
10
15
1.0
0.5
11
0.25^+-00..0045
Fig.1 BD9141MUV View
VREG
EN
5V
VREF
0.8V
Gm Amp.
Soft
Start
VCC
Current
Comp
RQ
S
SLOPE
CLK
OSC
VCC
UVLO
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
ADJ
ITH
RITH CITH
R1 ^R2
VCC
Input
PVCC
Output
SW
PGND
GND
Fig.2 BD9141MUV Block Diagram
●Pin No. & function table
Pin No.
1,2,3,4,5
6,7,8
9
10
11
12
13
14
15,16
17
18,19,20
Pin Name
SW
PVCC
N.C.
Vcc
GND
ADJ
ITH
VREG
N.C.
EN
PGND
BD9141MUV
Pin Function
Pch/Nch FET drain output pin
Pch FET source pin
Non connection
VCC power supply input pin
Ground
Output voltage detect pin
GmAmp output pin/Connected phase compensation capacitor
Reference Voltage
Non connection
Enable pin(Active High)
Nch FET source pin
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3/18
2009.06 - Rev.A