BD9134MUV_14 Datasheet, PDF (2/25 Pages) Rohm – Synchronous Buck Converter with Integrated FET

BD9134MUV
Pin Configuration
(TOP VIEW)
N.C. ITH GND
VOUT
15 14 13 12 11
N.C. 16
EN 17
18
PGND 19
20
10 ^VCC
9 BST
8
7 PVCC
6
1 23 4 5
SW
Figure 2. Pin Configuration
Pin Description
Pin
Pin
No. Name
1
SW
2
SW
Function
Power switch node
Power switch node
3
SW Power switch node
4
SW Power switch node
5
SW Power switch node
6 PVCC Power switch supply pin
7 PVCC Power switch supply pin
8 PVCC Power switch supply pin
9
BST Bootstrapped voltage Input pin
10 VCC Power supply input pin
Pin
Pin
No. Name
Function
11
GND Ground pin
12 VOUT Output voltage detection pin
GmAmp output pin/connected to phase
13
ITH
compensation capacitor
14
N.C. No connection
15
N.C. No connection
16
N.C. No connection
17
EN Enable pin(Active high）
18 PGND Power switch ground pin
19 PGND Power switch ground pin
20 PGND Power switch ground pin
Block Diagram
VCC
EN
VREF
Current
Comp
Gm Amp
+
+
RQ
S
SLOPE
CLK
OSC
VCC
Current
Sense/
Protect
+
Driver
Logic
Soft
UVLO
Start
TSD
SCP
VCC
BST
PVCC
5V
Input
SW
PVCC
PGND
GND
Output
VOUT
ITH
RITH _CITH
Figure 3. Block Diagram
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
2/21
TSZ02201-0J3J0AJ00150-1-2
03.Oct.2014 Rev.002