RT9229 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – Advaced Dual PWM and Dual Linear Power Controller

RT9229
Advanced Dual PWM and Dual Linear Power Controller
General Description
The RT9229 is a 4-in-one power controller optimized
for high-performance microprocessor and computer
applications. The IC integrates two PWM controllers,
a linear regulator and a linear controller as well as
monitoring and protection functions into a 28-pin
SOP package. The first PWM controller regulates the
microprocessor core voltage with a synchronous
buck converter, while the second PWM controller
supplies the 3.3V power with a standard buck
converter. The linear regulator provides power for the
clock driver circuit and the linear controller regulates
power for the GTL bus.
The RT9229 features an Intel-compatible, TTL 5-bit
programmable DAC that adjusts the core voltage
from 2.1V to 3.5V in 0.1V increments and from 1.3V
to 2.05V in 0.05V steps. The second PWM controller
is user-adjustable for output level between 3.0V and
3.5V with ±2.5% accuracy. The 5-bit DAC has a
typical ±1% tolerance. The linear regulator uses an
internal drive device to provide 2.5V ±2.5% output
voltage. The linear controller drives an external N-
channel MOSFET or a low cost NPN bipolar
transistor to provide 1.5V ±2.5%.
The RT9229 monitors all the output voltages. A
Power-good signal is issued when the core voltage is
within ±10% of the DAC setting and the other levels
are above their under-voltage levels. Additional build-
in over-voltage protection for the core output uses the
lower MOSFET to prevent output voltage above
115% of the DAC setting. The PWM over-current
function monitors the output current using the voltage
drop across the upper MOSFET’s R_DS(ON) which
eliminates the need for a current sensing resistor.
Ordering Information
RT9229……
Package type
S : SOP-28
Operating temperature range
C: Commercial standard
DS9229-03 July 2001
Features
z 4-in-one Regulated Voltages for Microprocessor
Core, I/O, Clock, and GTL
z Compatible with HIP6019B
z Power-Good Output Voltage Monitor
Switching section
z 5-bit DAC Programmable from 1.3V to 3.5V
z ±1% DAC Accuracy
z Fast Transient Response
z Full 0% to 100% Duty Cycle Driver
z Fixed 200kHz Switching Frequency
z Adaptive Non-overlapping Gate Driver
z Over-current Monitor Uses MOSFET R_DS(ON)
z Over-voltage Protection Uses Lower MOSFET
Linear Section
z User-adjustable Linear Regulator Output Voltage
z MOSFET or NPN Driving Capability
z Ultra Fast Response Speed
z Under-voltage Protection
z Internal Thermal Shutdown
Applications
z Full Motherboard Power Regulation for Computer
z Low-voltage Distributed Power Supplies
Pin Configurations
Part Number
Pin Configurations
RT9229CS
TOP VIEW
(Plastic SOP-28) UGATE2 ¹
PHASE2 2
VID4 ³
VID3 4
VID2 ⁵
VID1 6
VID0 7
PGOOD ⁸
OCSET2 ⁹
FB2 ¹⁰
NC2 ¹¹
SS ¹²
FAULT 13
FB4 14
28 VCC
27 UGATE1
26 PHASE1
25 _LGATE1
24 PGND
23 _OCSET1
22 VSEN1
21 _FB1
20 _NC1
19 _FB3
18 _GATE3
17 _GND
16 _VOUT4
15 _VSEN2
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