|
HIP6021 Datasheet, PDF (1/15 Pages) Intersil Corporation – Advanced PWM and Triple Linear Power Controller | |||
|
Data Sheet
HIP6021
February 1999
File Number 4684
Advanced PWM and Triple Linear Power
Controller
The HIP6021 provides the power control and protection for
four output voltages in high-performance, graphics intensive
microprocessor and computer applications. The IC
integrates a voltage-mode PWM controller and three linear
controllers, as well as the monitoring and protection
functions into a 28-pin SOIC package. The PWM controller
regulates the microprocessor core voltage with a
synchronous-rectiï¬ed buck converter. The linear controllers
regulate the computer systemâs AGP 1.5V or 3.3V bus
power, the 1.5V GTL bus power, and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits. The HIP6021 includes an Intel-compatible, TTL
5-input digital-to-analog converter (DAC) that adjusts the
core PWM output voltage from 1.3VDC to 2.05VDC in 0.05V
steps and from 2.1VDC to 3.5VDC in 0.1V increments. The
precision reference and voltage-mode control provide ±1%
static regulation. The AGP bus power linear controllerâs
output (VOUT2) is user-selectable, through a TTL-compatible
signal applied at the SELECT pin, for levels of 1.5V or 3.3V
with ±3% accuracy. Based on the status of the FIX pin, the
other two linear regulators provide either ï¬xed output
voltages of 1.5V±3% (VOUT3) and 1.8V±3% (VOUT4), or
user-adjustable by means of an external resistor divider. All
linear controllers can employ either N-channel MOSFETs or
bipolar NPNs for the pass transistor.
The HIP6021 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
controllerâs over-current function monitors the output current
by using the voltage drop across the upper MOSFETâs
rDS(ON).
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
PKG.
NO.
HIP6021CB
0 to 70 28 Ld SOIC
M28.3
HIP6021EVAL1 Evaluation Board
Applications
⢠Motherboard Power Regulation for Computers
Features
⢠Provides 4 Regulated Voltages
- Microprocessor Core, AGP Bus, Memory, and GTL Bus
Power
⢠Drives N-Channel MOSFETs
⢠Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors
⢠Fixed or Externally Resistor-Adjustable Linear Outputs
(FIX Pin)
⢠Simple Single-Loop Control Design
- Voltage-Mode PWM Control
⢠Fast PWM Converter Transient Response
- High-Bandwidth Error Ampliï¬er
- Full 0% to 100% Duty Ratio
⢠Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- Other Outputs: ±3% Over Temperature
⢠TTL-Compatible 5-Bit DAC Microprocessor Core Output
Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3VDC to 3.5VDC
⢠Power-Good Output Voltage Monitor
⢠Over-Voltage and Over-Current Fault Monitors
- Switching Regulator Does Not Require Extra Current
Sensing Element, Uses MOSFETâs rDS(ON)
⢠Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator; Programmable From
50kHz to Over 1MHz
- Small External Component Count
Pinout
HIP6021 (SOIC)
TOP VIEW
DRIVE2 1
FIX 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PGOOD 8
SD 9
VSEN2 10
SELECT 11
SS 12
FAULT/RT 13
VSEN4 14
28 VCC
27 UGATE
26 PHASE
25 LGATE
24 PGND
23 OCSET
22 VSEN1
21 FB
20 COMP
19 VSEN3
18 DRIVE3
17 GND
16 VAUX
15 DRIVE4
2-296
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
|
▷ |