HIP6028 Datasheet, PDF (1/16 Pages) Intersil Corporation – Advanced PWM and Dual Linear Power Control with Integrated ACPI Support Interface

Data Sheet
HIP6028
May 1998
File Number 4630
Advanced PWM and Dual Linear Power
Control with Integrated ACPI Support
Interface
The HIP6028 provides the power control and protection for
three output voltages in high-performance microprocessor
and computer applications. The IC integrates a PWM
controller, a linear regulator and a linear controller as well as
the monitoring and protection functions into a single
package. The PWM controller regulates the microprocessor
core voltage with a synchronous-rectified buck converter.
The linear controller regulates power for the GTL bus and
the linear regulator provides power for the clock driver circuit.
The HIP6028 includes an Intel-compatible, TTL 5-input
digital-to-analog converter (DAC) that adjusts the core PWM
output voltage from 2.1V_DC to 3.5V_DC in 0.1V increments
and from 1.3V_DC to 2.05V_DC in 0.05V steps. The precision
reference and voltage-mode control provide ±1% static
regulation. The linear regulator uses an internal pass device
to provide a fixed 2.5V ±2.5%. The linear controller drives an
external N-channel MOSFET to provide a fixed 1.5V ±2.5%.
The HIP6028 monitors all the output voltages. A single
Power Good signal is issued when the core is within ±10% of
the DAC setting and the other levels 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 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.
The HIP6028 offers integrated ACPI S3 shutdown state
support. Through the SD1&3 pin, the microprocessor core
and GTL bus supplies can be shut down when entering
power-saving standby operation mode.
Ordering Information
PART NUMBER
TEMP.
RANGE
(^oC)
PACKAGE
HIP6028CB
0 to 70 24 Ld SOIC
HIP6028EVAL1 Evaluation Board
PKG. NO.
M24.3
Features
• Provides 3 Regulated Voltages
- Microprocessor Core, Clock and GTL Power
• Integrated ACPI S3-State Shutdown Support
• Drives Low Cost Transistors
- PWM Controller Drives N-MOSFETs
- Linear Controller Compatible with Both MOSFETs and
NPN Bipolar Transistors
• Operates from +3.3V, +5V and +12V Inputs
• Simple Control Design
- Single-Loop Voltage-Mode PWM Control
- Fixed 1.5V GTL Output Voltage
- Fixed 2.5V Clock Output Voltage
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- Other Outputs: ±2.5% Over Temperature
• TTL-compatible 5-Bit Digital-to-Analog Core Output
Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V_DC to 3.5V_DC
• Power-Good Output Voltage Monitor
• Microprocessor Core Voltage Protection Against Shorted
MOSFET
• Over-Voltage and Over-Current Fault Monitors
- Does Not Require Extra Current Sensing Element,
Uses MOSFET’s r_DS(ON)
• Small Converter Size
- Constant Frequency Operation; 200kHz Free-Running
Oscillator; Programmable from 50kHz to 1MHz
Applications
• _{Full Motherboard Power Regulation for Computers}
• _{Low-Voltage Distributed Power Supplies}
Pinout
HIP6028 (SOIC)
TOP VIEW
VCC 1
VID4 2
VID3 3
VID2 4
VID1 5
VID0 6
PGOOD 7
FAULT 8
SS 9
RT 10
SD1&3 11
VIN2 12
24 UGATE
23 PHASE
22 LGATE
21 PGND
20 OCSET
19 VSEN1
18 FB
17 COMP
16 VSEN3
15 DRIVE3
14 GND
13 VOUT2
2-311
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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