RT9223 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 5 BIT PROGRAMMABLE SYNCHRONOUS PWM BUCK CONVERTER CONTROLLER

RT9223
5-Bit Programmable Synchronous PWM
Buck Converter Controller
General Description
The RT9223 is a high efficiency synchronous
switching regulator for modern CPU application. The
output is controlled by a 5-bit DAC programmed from
1.3V to 2.05V in 0.05V steps and from 2.1V to 3.5V
in 0.1V increments.
The switching controller drivers two N-MOSFETs at
200KHz frequency and provides an optimal solution
for size, efficiency and cost in any application
circuits. The controller also offers integrated
functions including PGOOD, output enable, over-
voltage, internal digital-count soft start, and current-
limiting protection in one chip.
Ordering Information
RT9223… …
Package type
S : SOP-20
Operating temperature range
C: Commercial standard
Features
z High Efficiency Synchronous N-MOSFET
Driver Operating at 200KHz
z 1.3V ~ 2.05V (0.05V steps) and 2.1V ~ 3.5V
(0.1V steps) Output Voltage
z Enable Input, PGOOD Output, OVP, and
Current-limiting Protection
z Internal Digital-count Soft Start
Applications
z Power Supply for Pentium Pro^TM, PowerPC^TM,
K6^TM, 6x86^TM, and Alpha^TM Microprocessors
z High-power 5V to 3.xV DC-DC Regulators
z Low-voltage Distributed Power Supplies
z Programmable Step-down Power Supplies
Pin Configurations
Part Number
RT9223CS
(Plastic SOP-20)
Pin Configurations
TOP VIEW
GND 1
VCC ²
OVP 3
PGOOD 4
CSN 5
CSP 6
PGNDH 7
DH 8
NC 9
PGNDL 10
20 _VID0
19 _VID1
18 _VID2
17 _VID3
16 _VID4
15 _VSEN
14 _SHDN
13 _BSTH
12 _BSTL
11 _DL
DS9223-07 May 2001
www.richtek-ic.com.tw
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