HIP6021_05 Datasheet, PDF (1/15 Pages) Intersil Corporation – Advanced PWM and Triple Linear Power Controller

®
Data Sheet
March 8, 2005
HIP6021
FN4684.1
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-rectified
buck converter. The linear controllers regulate the computer
system’s 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 1.3V_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 AGP bus power
linear controller’s output (V_OUT2) 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 fixed
output voltages of 1.5V±3% (V_OUT3) and 1.8V±3% (V_OUT4),
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
controller’s over-current function monitors the output current
by using the voltage drop across the upper MOSFET’s
r_DS(ON).
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
PKG.
DWG. #
HIP6021CB
0 to 70 28 Ld SOIC
M28.3
HIP6021CBZ (Note) 0 to 70 28 Ld SOIC (Pb-free) M28.3
HIP6021EVAL1 Evaluation Board
Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which are
RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
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 Amplifier
- 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 . . . . . . . . . . . . . . . . . . . 1.3V_DC to 3.5V_DC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
- Switching Regulator 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 Over 1MHz
- Small External Component Count
• Pb-Free Available (RoHS Compliant)
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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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