HIP6008 Datasheet, PDF (1/12 Pages) Intersil Corporation – Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor

Data Sheet
HIP6008
March 2000 File Number 4281.2
Buck Pulse-Width Modulator (PWM)
Controller and Output Voltage Monitor
The HIP6008 provides complete control and protection for a
DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive an
N-Channel MOSFET in a standard buck topology. The
HIP6008 integrates all of the control, output adjustment,
monitoring and protection functions into a single package.
The output voltage of the converter is easily adjusted and
precisely regulated. The HIP6008 includes a 4-Input Digital-
to-Analog Converter (DAC) that adjusts the output voltage
from 2.0VDC to 3.5VDC in 0.1V increments. The precision
reference and voltage-mode regulator hold the selected
output voltage to within ±1.5% over temperature and line
voltage variations.
The HIP6008 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a
200kHz free-running triangle-wave oscillator that is
adjustable from below 50kHz to over 1MHz. The error
amplifier features a 15MHz gain-bandwidth product and
6V/µs slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.
The HIP6008 monitors the output voltage with a window
comparator that tracks the DAC output and issues a Power
Good signal when the output is within ±10%. The HIP6008
protects against over-current conditions by inhibiting PWM
operation. Built-in over-voltage protection triggers an
external SCR to crowbar the input supply. The HIP6008
monitors the current by using the r_DS(ON) of the upper
MOSFET which eliminates the need for a current sensing
resistor.
Pinout
HIP6008
(SOIC)
TOP VIEW
Features
• Drives N-Channel MOSFET
• Operates From +5V or +12V Input
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- ±1.5% Over Line Voltage and Temperature
• 4 Bit Digital-to-Analog Output Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . .2.0VDC to 3.5VDC
- 0.1V Binary Steps
• Power-Good Output Voltage Monitor
• 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 over 1MHz
Applications
• _{Power Supply for Pentium®, Pentium Pro, PowerPC™ and}
Alpha™ Microprocessors
• _{High-Power 5V to 3.xV DC-DC Regulators}
• _{Low-Voltage Distributed Power Supplies}
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
HIP6008CB
0 to 70 16 Ld SOIC
PKG.
NO.
M16.15
OCSET 1
SS 2
VID0 3
VID1 4
VID2 5
VID3 6
COMP 7
FB 8
16 VSEN
15 RT/OVP
14 VCC
13 BOOT
12 UGATE
11 PHASE
10 PGOOD
9 GND
Alpha™ is a trademark of Digital Equipment Corporation.
Pentium® is a registered trademark of Intel Corporation.
PowerPC™ is a trademark of IBM.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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