BD9134MUV_0909 Datasheet, PDF (3/18 Pages) Rohm – Output 2A or More High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9134MUV
Technical Note
●Block Diagram, Application Circuit
【BD9134MUV】
4.0
D9134
Lot No.
S
0.08 S
C0.2 ^2.1±0.1
1
5
20
6
16
15
1.0
0.5
10
11
0.25^+-00..0045
VQFN020V4040(Unit : mm)
Fig.1 BD9134MUV TOP View
●Pin No. & function table
Pin
Pin
No. name
1
SW SW pin
Function
2
SW SW pin
3
SW SW pin
4
SW SW pin
5
SW SW pin
6 PVCC Highside FET source pin
7 PVCC Highside FET source pin
8 PVCC Highside FET source pin
9
BST Bootstrapped voltage input pin
10 VCC VCC power supply input pin
VCC
EN
VREF
Current
Comp
+
RQ
S
Gm Amp
+
SLOPE CLK
OSC
VCC
Soft
UVLO
Start
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
VCC
BST
PVCC
5V
Input
SW
PVCC
PGND
GND
Output
VOUT
ITH
RITH _CITH
Fig.2 BD9134MUV Block Diagram
Pin
Pin
No. name
11
GND Ground
Function
12 VOUT Output voltage detect pin
GmAmp output pin/Connected phase
13
ITH
compensation capacitor
14
N.C. Non Connection
15
N.C. Non Connection
16
N.C. Non Connection
17
EN Enable pin(High Active）
18 PGND Lowside FET source pin
19 PGND Lowside FET source pin
20 PGND Lowside FET source pin
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2009.09 - Rev.B