Intersil Corporation HIP6011 Datasheet

September 1997

HIP6011

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-perfor mance micropro­cessor applications. It is designed to drive an N-Channel
MOSFET in a standard buck topology. The HIP6011 inte­grates all of the control, output adjustment, monitoring and
protection functions into a single package.

The output voltage of the converter can be precisely regu­lated to as low as 1.27V, with a maximum tolerance of ±1.5%
over temperature and line voltage variations.

The HIP6011 provides simple, single feedbac k loop, voltage­mode 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 HIP6011 protects against over-current conditions by inhib­iting PWM operation. The HIP6011 monitors the current by
using the r

of the upper MOSFET which eliminates the

DS(ON)

need for a current sensing resistor. Built-in over-voltage protec­tion triggers an external SCR to crowbar the input supply.

Ordering Information

TEMP.

PART NUMBER

HIP6011 0 to 70 14 Ld SOIC M14.15

RANGE (oC) PACKAGE

PKG.

NO.

Pinout

HIP6011

(SOIC)

TOP VIEW

VSEN

1

OCSET

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

SS

COMP

FB

EN

GND

2
3
4
5
6
7

14

RT

13

OVP

12

VCC

11

NC

10

BOOT

9

UGATE

8

PHASE

1

File Number 4409

Typical Application

HIP6011

Block Diagram

SS

OVP

RT

FB

OSC

REF

+12V

VCC

MONITOR AND

PROTECTION

HIP6011

+

-

COMP

-

+

VSEN

GND

OCSET
EN

BOOT

UGATE

PHASE

OVP

+5V OR +12V

VCC

+V

O

VSEN

OCSET

FB

COMP

RT

REFERENCE

115%

200µA

1.27V REF
+

-

ERROR

AMP

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

COMPARATOR

OSCILLATOR

4V

PWM

+

-

POWER-ON
RESET (POR)

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

EN

10µA

SS

BOOT
UGATE

PHASE

GND

All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.

Intersil products are sold by description only. Intersil Cor poration reserves the right to make changes in circuit design and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate
and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or otherwise under an y patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see web site http://www.intersil.com

2

HIP6011

Absolute Maximum Ratings T

Supply Voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+15.0V

Boot Voltage, V

BOOT

- V

. . . . . . . . . . . . . . . . . . . . . . .+15.0V

PHASE

Input, Output or I/O Voltage . . . . . . . . . . . . GND-0.3V to VCC+0.3V

ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2

Recommended Operating Conditions

=25oC Thermal Information

A

Thermal Resistance (Typical, Note 1) θJA (oC/W)

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . . .150oC

Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC

Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . .300oC

(SOIC - Lead Tips Only)

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . +12V ±10%

Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . .0oC to 70oC

Junction Temperature Range . . . . . . . . . . . . . . . . . . . .0oC to 125oC

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

VCC SUPPLY CURRENT

Nominal Supply I

CC

Shutdown Supply EN = 0V 50 100 µA

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Enable - Input threshold Voltage V
Rising V

Threshold 1.26 V

OCSET

OSCILLATOR

Free Running Frequency RT = OPEN, VCC = 12V 180 200 220 kHz
Total Variation 6kΩ < RT to GND < 200kΩ -20 +20 %
Ramp Amplitude ∆V

OSC

REFERENCE

Reference Voltage V

REF

ERROR AMPLIFIER

DC Gain 88 dB
Gain-Bandwidth Product GBW 15 MHz
Slew Rate SR COMP = 10pF 6 V/µs

GATE DRIVERS

Upper Gate Source I
Upper Gate Sink

UGATE

R

UGATE

PROTECTION

Over-Voltage Trip (V

SEN/VREF

OCSET Current Source I
OVP Sourcing Current I
Soft Start Current I

) 115 120 %

OCSETVOCSET

OVP

SS

EN = VCC; UGATE and LGATE open 5 mA

= 4.5VDC 10.4 V

OCSET

= 4.5VDC 8.2 V

OCSET

= 4.5VDC 0.8 2.0 V

OCSET

RT = OPEN 1.9 V

P-P

1.251 1.270 1.289 V

V

- V

BOOT

I

= 0.3A 5.5 10 Ω

LGATE

PHASE

= 12V, V

= 6V 350 500 mA

UGATE

= 4.5VDC 170 200 230 µA

V

SEN

= 5.5V; V

= 0V 60 mA

OVP

10 µA

3