rt9232a Richtek Technology Corporation, rt9232a Datasheet
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rt9232a
Manufacturer Part Number
rt9232a
Description
Programmable Frequency Synchronous Buck Controller
Manufacturer
Richtek Technology Corporation
Datasheet
1.RT9232A.pdf
(14 pages)
Programmable Frequency Synchronous Buck PWM Controller
General Description
The RT9232A is a single-phase synchronous buck PWM
DC-DC converter controller designed to drive two N-Channel
MOSFET. It provides a highly accurate, programmable
output voltage precisely regulated to low voltage
requirement with an internal 0.8V ± 1% reference.
The RT9232A uses an external compensated, single
feedback loop voltage mode PWM control for fast transient
response. An oscillator with Programmable frequency
(50kHz to 800kHz) reduces the external inductor and
capacitor component size for saving PCB board area.
The
high current output applications (up to 25A) while
minimizing external components. It is suitable for high-
performance graphic processors, DDR and VTT power.
The RT9232A integrates complete protect functions such
as Soft Start, Output Enable, UVLO(under-voltage lockout)
into a small 14-pin package.
Ordering Information
Note :
RichTek Pb-free and Green products are :
DS9232A-02 March 2007
RT9232A
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
RT9232A provides fast transient response to
Package Type
S : SOP-14
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
satisfy
Features
Applications
Pin Configurations
Single IC Supply Voltage : 12V
Single phase DC/DC Buck Converter with
Operate from 12V, 5V or 3.3V Input
0.8V
Adaptive Non-Overlapping Gate Drivers
Integrated High-Current, HV Gate Drivers
External Programmable Soft Start
External Programmable Frequency
(Range : 50kHz to 800kHz, 200kHz Free Run )
Integrated Output Short Circuit Protection
On/Off Control by Enable Pin
Drives Two N-MOSFET
Full 0 to 100% Duty Cycle
Fast Transient Response
Voltage Mode PWM Control with External
Feedback Loop Compensation
RoHS Compliant and 100% Lead (Pb)-Free
System (Graphic, MB) with 12V Power.
Graphic Cards (AGP 8X, 4X, PCI Express*16):
–
–
–
3.3V ~ 12V Input DC-DC Regulators
Low Voltage Distributed Power Supplies
High Output Current (up to 25A )
Low Output Voltage (down to 0.8V )
High Input Voltage (up to 12V )
(GPU, VPU)
High-Current for High-Performance Graphic Processors
Middle Current for High-Performance Graphic Memory
Low Current with Sink Capacity for High-Performance
Graphic Memory Power (DDR/VTT)
Power (DDR, DDR II)
±
1% Internal Reference
SENSE
COMP
GND
RT
SS
EN
FB
(TOP VIEW)
2
3
4
5
6
7
SOP-14
14
13
12
11
10
9
8
PVCC
UGATE
PHASE
RT9232A
VCC
LGATE
PGND
BOOT
www.richtek.com
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