HIP6004B Datasheet, PDF (1/12 Pages) Intersil Corporation – Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor

TM
Data Sheet
HIP6004B
February 1999
HIP6004B
FN4567.2
Buck and Synchronous-Rectifier (PWM)
Controller and Output Voltage Monitor
The HIP6004B provides complete control and protection for
a DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive two
N-Channel MOSFETs in a synchronous-rectified buck
topology. The HIP6004B 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 HIP6004B includes a fully TTL-
compatible 5-input digital-to-analog converter (DAC) that
adjusts the output voltage from 1.3V_DC to 2.05V_DC in
0.05V and from 2.1V_DC to 3.5V_DC in 0.1V increments
steps. The precision reference and voltage-mode regulator
hold the selected output voltage to within ±1% over
temperature and line voltage variations.
The HIP6004B 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 HIP6004B 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
HIP6004B protects against over-current and overvoltage
conditions by inhibiting PWM operation. Additional built-in
overvoltage protection triggers an external SCR to crowbar
the input supply. The HIP6004B 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
PKG.
NO.
HIP6004BCB
0 to 70 20 Ld SOIC
M20.3
HIP6004BCV
0 to 70 20 Ld TSSOP
M20.173
NOTE: When ordering, use the entire part number. Add the suffix T
to obtain the TSSOP variant in tape and reel, e.g., HIP6004BCV-T.
Features
• Drives Two N-Channel MOSFETs
• 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 . . . . . . . . . . . . . . . . . . . 1.3V_DC to 3.5V_DC
- 0.1V Binary Steps . . . . . . . . . . . . . . 2.1V_DC to 3.5V_DC
- 0.05V Binary Steps . . . . . . . . . . . . 1.3V_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
HIP6004B
(SOIC, TSSOP)
TOP VIEW
VSEN 1
OCSET 2
SS 3
VID0 4
VID1 5
VID2 6
VID3 7
VID4 8
COMP 9
FB 10
20 RT
19 OVP
18 VCC
17 LGATE
16 PGND
15 BOOT
14 UGATE
13 PHASE
12 PGOOD
11 GND
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.
74
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved