HIP6011 Datasheet, PDF (1/9 Pages) Intersil Corporation – Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor

HIP6011
September 1997
Buck Pulse-Width Modulator (PWM) Controller
and Output Voltage Monitor
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
- 1.27V Internal Reference
- ±1.5% Over Line Voltage and Temperature
• 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
Description
The HIP6011 provides complete control and protection for a
DC-DC converter optimized for high-performance micropro-
cessor applications. It is designed to drive an N-Channel
MOSFET in a standard buck topology. The HIP6011 inte-
grates all of the control, output adjustment, monitoring and
protection functions into a single package.
The output voltage of the converter can be precisely regu-
lated to as low as 1.27V, with a maximum tolerance of ±1.5%
over temperature and line voltage variations.
The HIP6011 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a
200kHz free-running triangle-wave oscillator that is adjust-
able 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 tran-
sient performance. The resulting PWM duty ratio ranges
from 0% to 100%.
The HIP6011 protects against over-current conditions by inhib-
iting PWM operation. The HIP6011 monitors the current by
using the r_DS(ON) of the upper MOSFET which eliminates the
need for a current sensing resistor. Built-in over-voltage protec-
tion triggers an external SCR to crowbar the input supply.
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
HIP6011
0 to 70 14 Ld SOIC
PKG.
NO.
M14.15
Pinout
HIP6011
(SOIC)
TOP VIEW
VSEN 1
OCSET 2
SS 3
COMP 4
FB 5
EN 6
GND 7
14 _RT
13 OVP
12 VCC
11 NC
10 BOOT
9 UGATE
8 PHASE
Alpha™ is a trademark of Digital Equipment Corporation.
Pentium™ is a trademark of Intel Corporation.
Pentium™ Pro is a trademark of Intel Corporation.
PowerPC™ is a trademark of IBM.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
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File Number 4409