HIP6020A Datasheet, PDF (1/16 Pages) Intersil Corporation – Advanced Dual PWM and Dual Linear Power Controller

TM
Data Sheet
HIP6020A
April 1999
File Number 4735
Advanced Dual PWM and Dual Linear
Power Controller
The HIP6020A provides the power control and protection for
four output voltages in high-performance, graphics intensive
microprocessor and computer applications. The IC
integrates two PWM controllers and two linear controllers, as
well as the monitoring and protection functions into a 28-pin
SOIC package. One PWM controller regulates the
microprocessor core voltage with a synchronous-rectified
buck converter. The second PWM controller supplies the
computer system’s AGP 1.5V or 3.3V bus power with a
standard buck converter. The linear controllers regulate
power for the 1.5V GTL bus and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits.
The HIP6020A includes an Intel-compatible, TTL 5-input
digital-to-analog converter (DAC) that adjusts the core PWM
output voltage from 1.3V_DC to 2.05V_DC in 0.05V steps and
from 2.1V_DC to 3.5V_DC in 0.1V increments. The precision
reference and voltage-mode control provide ±1% static
regulation. The second PWM controller’s output is user-
selectable, through a TTL-compatible signal applied at the
SELECT pin, for levels of 1.5V (±3%) or fully ON switch. The
linear regulators use external N-Channel MOSFETs or
bipolar NPN pass transistors to provide output voltages of
1.5V ±3% (V_OUT3) and 1.8V ±3% (V_OUT4).
The HIP6020A monitors all the output voltages. A single
Power Good signal is issued when the core is within 10% of
the DAC setting and all other outputs are above their under-
voltage levels. Additional built-in over-voltage protection for
the core output uses the lower MOSFET to prevent output
voltages above 115% of the DAC setting. The PWM
controllers’ over-current function monitors the output current
by using the voltage drop across the upper MOSFET’s
r_DS(ON), eliminating the need for a current sensing resistor.
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
HIP6020ACB
0 to 70 28 Ld SOIC
PKG.
NO.
M28.3
Features
• Provides 4 Regulated Voltages
- Microprocessor Core, AGP Bus, North/South Bridge
and/or Cache Memory, and GTL Bus Power
• Drives N-Channel MOSFETs
• Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors
• Simple Single-Loop Control Designs
- Voltage-Mode PWM Control
• Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifiers
- Full 0% to 100% Duty Ratios
• Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- AGP Bus PWM Output: ±3% Over Temperature
(1.5V Setting Only)
- Other Outputs: ±3% Over Temperature
• TTL-Compatible 5 Bit DAC Microprocessor Core Output
Voltage Selection
- Wide Range - 1.3V_DC to 3.5V_DC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
- Switching Regulators Use MOSFET’s r_DS(ON) Sensing
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator; Programmable From
50kHz to Over 1MHz
- Small External Component Count
Applications
• _{Motherboard Power Regulation for Computers}
Pinout
HIP6020A (SOIC)
TOP VIEW
UGATE2 1
PHASE2 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PGOOD 8
OCSET2 9
VSEN2 10
SELECT 11
SS 12
FAULT/RT 13
FB4 14
28 VCC
27 UGATE1
26 PHASE1
25 LGATE1
24 PGND
23 OCSET1
22 VSEN1
21 FB1
20 COMP1
19 FB3
18 DRIVE3
17 GND
16 VAUX
15 DRIVE4
4-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999