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HIP6021A Datasheet, PDF (1/16 Pages) Intersil Corporation – Advanced PWM and Triple Linear Power Controller | |||
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Data Sheet
HIP6021A
November 1999
File Number 4793
Advanced PWM and Triple Linear Power
Controller
The HIP6021A 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 lead SOIC package.
The synchronous-rectiï¬ed buck converter 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. A TTL-compatible
signal applied to the SELECT pin dictates which method of
control is used for the AGP bus power: a low state results in
linear control of the AGP bus to 1.5V, while a high state
transitions the output through a linearly controlled softstart to
3.3V, followed by full enhancement of the external MOSFET
to pass the input voltage. The other two linear regulators
provide ï¬xed output voltages of 1.5V GTL bus power and
1.8V power for the North/South Bridge core and/or cache
memory. These levels are user-adjustable by means of an
external resistor divider and pulling the FIX pin low. All linear
controllers can employ either N-Channel MOSFETs or
bipolar NPNs for the pass transistor.
The HIP6021A 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
HIP6021ACB
0 to 70 28 Ld SOIC
HIP6021EVAL1 Evaluation Board
PKG.
NO.
M28.3
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
⢠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 Core Output Voltage Selection
- Shutdown Feature Removed When All Inputs High
- 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 Upper MOSFETâs rDS(ON)
⢠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
HIP6021A (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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 407-727-9207 | Copyright © Intersil Corporation 1999
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