BD91361MUV_12 Datasheet, PDF (2/23 Pages) Rohm – 2.7V to 5.5V, 4A 1ch Synchronous Buck Converter Integrated FET

BD91361MUV
●Pin Configuration(TOP VIEW)
Datasheet
15 14 13 12 11
N.C. 16
EN ¹⁷
18
PGND 19
20
1 23 4 5
10 _VCC
9 BST
8
7 PVCC
6
●Pin Description
Pin Pin
No. name
1
SW
2
SW
3
SW
4
SW
5
SW
6 PVCC
7 PVCC
8 PVCC
9
BST
10 VCC
Fig.2 Pin configuration
Function
Pin
No.
SW pin
11
SW pin
12
SW pin
13
SW pin
14
SW pin
15
Highside FET source pin
16
Highside FET source pin
17
Highside FET source pin
18
Bootstrapped voltage input pin
19
VCC power supply input pin
20
Pin
name
GND
ADJ
ITH
VID<1>
VID<0>
N.C.
EN
PGND
PGND
PGND
Function
Ground
Output voltage detect pin
GmAmp output pin/Connected phase
compensation capacitor
Output voltage control pin<1>
Output voltage control pin<0>
Non Connection
Enable pin(High Active）
Lowside FET source pin
Lowside source pin
Lowside source pin
●Block Diagram
VCC
EN
VID<0>
VID<1>
VREF
SELECTOR
Gm Amp
+
Soft
Start
Current Comp
+
RQ
S
SLOPE
CLK
OSC
VCC
UVLO
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
PVCC
VCC
BST
PVCC
Input
SW
Output
PGND
GND
ADJ
R2
R1
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Fig.3 Block Diagram
2/21
TSZ02201-0J3J0AJ00200-1-2
02.MAR.2012 Rev.001