RT9224CCS Ver la hoja de datos (PDF) - Richtek Technology
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RT9224CCS
Richtek Technology
RT9224CCS Datasheet PDF : 8 Pages
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Preliminary
RT9224C
VRM 9.0 Synchronous PWM Buck Converter
Controller and Output Voltage Monitor
General Description
The RT9224C is a high speed switching controller designed
for use in Synchronous DC/DC buck converter for modern
CPUs. The regulated output voltage is digitally
programmable from 1.075V to 1.85V by a 5-bit DAC which
provides initial accuracy of ±1%. The RT9224C drives two
external N-Channel MOSFETs, providing high efficiency
and eliminating the need for high cost P-Channel devices.
It senses the output current across the on-resistance of
the N-Channel MOSFET and provides an adjustable current
limit without external sense resistor.
The RT9224C monitors the output voltage and provides
the output signal for power-good and over-voltage
protections. The switching frequency is 200kHz. The high
switching frequency cooperating with a high speed error
amplifier maintains a fast response to the dynamic load of
modern CPUs.
Ordering Information
RT9224C
Package Type
S : SOP-20
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Features
Simple Voltage-Mode PWM Control with Buck
Rectification
±1% DAC Output Voltage Accuracy
5-Bit Digital-to-Analog Output Voltage Range from
1.075V to 1.85V
Fast Transient Response and Excellent Output
Voltage Regulation
Fault Protection for Over-Voltage and Over- Current
Power-Good Output Voltage Monitor
Applications
Power Supply for VRM 9.0 Microprocessors
Low-Voltage Distributed Power Supplies
High Power 5V to 1.075V to 1.85V Switching Regulator
Pin Configurations
(TOP VIEW)
VSEN
OCSET 2
SS
3
VID0 4
VID1 5
VID2 6
VID3 7
VID4 8
NC
9
FB 10
20 NC
19 OVP
18 VCC
17 LGATE
16 PGND
15
BOOT
14
UGATE
13 PHASE
12 PGOOD
11 GND
SOP-20
DS9224C-02 March 2004
www.richtek.com
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