BD9123MUV_14 Datasheet, PDF (2/28 Pages) Rohm – Synchronous Buck Converter with Integrated FET

BD9123MUV
Pin Configuration
(TOP VIEW)
VID<0> VID<1> VID<2> VOUT
1^>2 11 10 9
EN ₁₃
8 ^ITH
VCC 14
PVCC ₁₅
(TOP VIEW)
7 ^PGOOD
6 GND
PVCC ₁₆
5 ^PGND
1 23 4
SW SW SW PGND
Figure 2. Pin Configuration
Pin Description
Pin No. Pin name
1
2
SW
3
4
5
PGND
6
GND
7
PGOOD
8
ITH
9
VOUT
10
VID<2>
11
VID<1>
12
VID<0>
13
EN
14
VCC
15
16
PVCC
Function
Pch/Nch FET drain output pin
Nch FET source pin
Ground
Power good pin
Gm Amp output pin/connected phase
compensation capacitor
Output voltage pin
Output voltage control pin<2>
Output voltage control pin<1>
Output voltage control pin<0>
Enable pin(High Active）
VCC power supply input pin
Pch FET source pin
Block Diagram
VCC
EN
13
VREF
VID<0> 12
VID<1> 11
VID<2> 10
VOUT ₉
V_CC
7
PGOOD
SELECTOR
Gm Amp
Soft
Start
Current
Comp
SLOPE
RQ
S
CLK
OSC
VCC
UVLO
Current
Sense/
Protect
+
Driver
Logic
PGOOD
TSD
VCC
14
PVCC
15
0.1µF
100Ω
Input
16
10µF
SW
1
4.7µH
2
3
PGND
4
5
6
GND
Output
22µF
8
ITH
RITH
CITH
Figure 3. Block Diagram
Datasheet
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TSZ02201-0J3J0AJ00120-1-2
02.Oct.2014 Rev.002