HIP6005A Datasheet, PDF (1/12 Pages) Intersil Corporation – Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor

Data Sheet
HIP6005A
September 1997 File Number 4418.1
Buck Pulse-Width Modulator (PWM)
Controller and Output Voltage Monitor
The HIP6005A 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
HIP6005A 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 HIP6005A includes a fully TTL-
compatible 5-input digital-to-analog converter (DAC) that
adjusts the output voltage from 2.1V_DC to 3.5V_DC in 0.1V
increments and from 1.8V_DC to 2.05V_DC in 0.05V steps.
The precision reference and voltage-mode regulator hold the
selected output voltage to within ±1% over temperature and
line voltage variations.
The HIP6005A 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 HIP6005A 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 HIP6005A
protects against over-current and over-voltage conditions by
inhibiting PWM operation. Additional built-in over-voltage
protection triggers an external SCR to crowbar the input
supply. The HIP6005A monitors the current by using the
r_DS(ON) of the upper MOSFET which eliminates the need for
a current sensing resistor.
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
HIP6005ACB
0 to 70 20 Ld SOIC
PKG.
NO.
M20.3
6X86™ is a trademark of Cyrix Corporation.
Alpha™ is a trademark of Digital Equipment Corporation.
K6™ is a trademark of Advanced Micro Devices, Inc.
Pentium® is a registered trademark of Intel Corporation.
PowerPC™ is a trademark of IBM.
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% Over Line Voltage and Temperature
• TTL-Compatible 5-Bit Digital-to-Analog Output Voltage
Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.8V_DC to 3.5V_DC
- 0.1V Binary Steps . . . . . . . . . . . . . . . 2.1V_DC to 3.5V_DC
- 0.05V Binary Steps . . . . . . . . . . . . . 1.8V_DC to 2.05V_DC
• 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, Pentium II,
PowerPC™, K6™, 6X86™ and Alpha™ Microprocessors
• _{High-Power 5V to 3.xV DC-DC Regulators}
• _{Low-Voltage Distributed Power Supplies}
Pinout
HIP6005A
(SOIC)
TOP VIEW
V_SEN 1
OCSET 2
SS 3
VID0 4
VID1 5
VID2 6
VID3 7
VID4 8
COMP 9
FB 10
20 R_T
19 OVP
18 V_CC
17 NC
16 NC
15 BOOT
14 UGATE
13 PHASE
12 PGOOD
11 GND
2-98
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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