rt9232b Richtek Technology Corporation, rt9232b Datasheet - Page 2

• Manufacturer Part Number: rt9232b
• Description: Programmable Frequency Synchronous Buck Controller
• Manufacturer: Richtek Technology Corporation

Typical Application Circuit
RT9232B
Functional Pin Description
www.richtek.com
2
Pin No.
V
CC
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10k
R3
RT
OCSET
SS
COMP
FB
EN
GND
PHASE
UGATE
BOOT
PGND
LGATE
PVCC
VCC
Pin Name
0.22uF
C1
C2
C
SS
51k
0.22uF
R2
2.2
R1
0.1uF
V
CC
14
13
3
1
6
7
4
VCC
PVCC
SS
RT
EN
GND
COMP
Pin Function
Oscillator Frequency Setting
Set Over Current Protection Triggering Level
Soft Start Time Interval Setting
Feedback Compensation
Voltage Feedback
Chip Enable (Active High)
IC Signal Reference Ground
Return Path for Upper MOSFET
Upper MOSFET Gate Drive
Input Supply for Upper Gate Drive
Power Ground
Lower MOSFET Gate Drive
Input Supply for Lower Gate Drive
Internal IC Supply (12V Bias)
10nF
C12
RT9232B
C11
OCSET
UGATE
PHASE
LGATE
PGND
BOOT
33pF
15k
R8
FB
1N4148
10
2
9
8
12
11
5
D1
0.1uF
C4
R10
562
IPD06N03LA
R5
R6
0
0
C3
3.01k
10nF
C13
R4
1nF
R9
1k
R11
Q2
1k
IPD09N03LA
Q1
2.2
R7
1nF
C7
2.2uH
L2
0.1uF
2200uF
C5
CE3
510uF
10uF
C6
1uH
CE4
L1
3.3V - 12V
22uF
V
IN
DS9232B-03 March 2007
C8
+
CE0
CE1
1000uF
10uF 0.1uF
470uF
C9
C10
1000uF
CE2
V
OUT