BD91361MUV Datasheet, PDF (3/18 Pages) Rohm – Output 2A More High-efficiency Step-down Switching Regulator with Built-in Power MOS FET

BD91361MUV
Technical Note
●Block Diagram, Application Circuit
【BD91361MUV】
4.0±0.1
D9136
1
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 TOP View
VID<0>
VID<1>
VCC
EN
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
ITH
RITH CITH
Fig.2 Block Diagram
●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
Pin
Pin
No. name
11 GND Ground
Function
12
ADJ Output voltage detect pin
13
ITH
GmAmp output pin/Connected phase
compensation capacitor
14 VID<1> Output voltage control pin<1>
15 VID<0> Output voltage control pin<0>
16 N.C. Non Connection
17
EN Enable pin(High Active）
18 PGND Lowside FET source pin
19 PGND Lowside source pin
20 PGND Lowside source pin
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2010.06 - Rev.A