BD9109FVM-LB Datasheet, PDF (2/23 Pages) Rohm – Synchronous Buck Converter Integrated FET

BD9109FVM-LB
Pin Configuration
(Top View)
1 VOUT
VCC 8
2 ITH
PVCC 7
3 EN
SW 6
4 GND
PGND 5
Pin Description
Pin No.
1
2
3
4
5
6
7
8
Figure 2. Pin Configuration
Pin Name
VOUT
ITH
EN
GND
PGND
SW
PVCC
VCC
Function
Output voltage detect pin
GmAmp output pin/Connected phase compensation capacitor
Enable pin(Active High)
Ground
Nch FET source pin
Pch/Nch FET drain output pin
Pch FET source pin
VCC power supply input pin
Block Diagram
EN
3
VREF
Current
Comp.
RQ
Gm Amp.
S
SLOPE
CLK
VCC ^OSC
Soft
Start
UVLO
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
1
VOUT
2
ITH
VCC
8
7
PVCC
6
SW
PGND
5
4
GND
Figure 3. Block Diagram
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21.Feb.2014 Rev.002