Intersil Corporation HIP6012 Datasheet

HIP6012

Data Sheet June 1997 File Number

Buck and Synchronous-Rectifier
Pulse-Width Modulator (PWM) Controller

The HIP6012 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 HIP6012 integrates all of the control, output
adjustment, monitoring andprotectionfunctions 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 HIP60012 provides simple, single feedback loop,
voltage-modecontrol 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 HIP6012 protects against over-current conditions by
inhibiting PWM operation. The HIP6012 monitors the current
by using the r

DS(ON)

of the upper MOSFET which eliminates

the need for a current sensing resistor.

Pinout

HIP6012

(SOIC)

TOP VIEW

4324

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

- 1.27V Internal Reference

- ±1.5% Over Line Voltage and Temperature

• Over-Current Fault Monitor

- Does Not Require Extra Current Sensing Element

- Uses MOSFETs r

DS(ON)

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator Programmable from
50kHz to Over 1MHz

• 14 Pin, SOIC Package

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

RT

OCSET

SS

COMP

FB
EN

GND

1
2
3
4
5
6
7

2-152

14
13
12
11
10
9
8

VCC
PVCC
LGATE
PGND
BOOT
UGATE
PHASE

Ordering Information

TEMP.

PART NUMBER

HIP6012CB 0 to 70 14 Ld SOIC M14.15

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

RANGE (oC) PACKAGE

PowerPC™ is a trademark of IBM.

Alpha™ is a trademark of Digital Equipment Corporation.

Pentium® is a registered trademark of Intel Corporation.

| Copyright © Intersil Corporation 1999

PKG.

NO.

Typical Application

12V

VCC

HIP6012

+5V OR +12V

Block Diagram

SS

RT

FB

REF

MONITOR AND

PROTECTION

OSC

HIP6012

+

-

COMP

OCSET
EN

BOOT

UGATE
PHASE

+12V

PVCC

-

+

LGATE
PGND

GND

VCC

POWER-ON

RESET (POR)

+V

O

EN

OCSET

FB

COMP

RT

REFERENCE

200µA

1.27 VREF
+

-

ERROR

AMP

+

-

OVER-

CURRENT

4V

PWM

COMPARATOR

OSCILLATOR

10µA

SOFT-

START

+

-

INHIBIT

PWM

GATE

CONTROL

LOGIC

SS

BOOT
UGATE

PHASE

PVCC
LGATE
PGND
GND

2-153

HIP6012

Absolute Maximum Ratings Thermal Information

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

Operating Conditions

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 operationofthe
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 - 1.27 - V

OCSET

OSCILLATOR

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

OSC

REFERENCE

Reference Voltage 1.251 1.270 1.289 V

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 R
Lower Gate Source I
Lower Gate Sink R

UGATE

UGATEILGATE

LGATE

LGATEILGATE

PROTECTION

OCSET Current Source I
Soft Start Current I

OCSETVOCSET

SS

EN = VCC; UGATE and LGATE Open - 5 - mA

= 4.5VDC - - 10.4 V

OCSET

= 4.5VDC 8.8 - - V

OCSET

= 4.5VDC 0.8 - 2.0 V

OCSET

RT = OPEN - 1.9 - V

V

- V

BOOT

PHASE

= 0.3A - 5.5 10 Ω

VCC = 12V, V

= 0.3A - 3.5 6.5 Ω

= 4.5VDC 170 200 230 µA

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

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

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

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

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

(Lead tips only)

= 12V, V

= 6V 300 450 - mA

LGATE

= 6V 350 500 - mA

UGATE

-10- µA

P-P

2-154