intersil HIP6013 DATA SHEET

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HIP6013

Data Sheet June 1997

Buck Pulse-Width Modulator (PWM) Controller

The HIP6013 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 HIP6013 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 HIP6013 provides simple,single feedback 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 HIP6013 protects against over-current conditions by inhibiting PWM operation. The HIP6013 monitors the current by using the r

DS(ON)

the need for a current sensing resistor.

of the upper MOSFET which eliminates

File Number

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-Current Fault Monitor

- 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

• 14 Pin, SOIC Package

Applications

4325

Ordering Information

TEMP.RANGE

PART NUMBER

HIP6013CB 0 to 70 14 Ld SOIC M14.15

(oC) PACKAGE

PKG.

NO.

Pinout

HIP6013

(SOIC)

TOP VIEW

OCSET

COMP

FB EN

GND

1 2 3 4 5 6 7

14 13 12 11 10 9 8

VCC NC NC NC BOOT UGATE PHASE

• Power Supply for Pentium®, Pentium Pro, PowerPC™and Alpha™ Microprocessors

• High-Power 5V to 3.xV DC-DC Regulators

• Low-Voltage Distributed Power Supplies

PowerPC™ is a trademark of IBM.

Alpha™ is a trademark of Digital Equipment Corporation.

Pentium® is a registered trademark of Intel Corporation.

2-162

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

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

Typical Application

12V

VCC

HIP6013

+5V OR +12V

Block Diagram

REF

MONITOR AND

PROTECTION

OSC

HIP6013

COMP

OCSET EN

BOOT

UGATE

PHASE

VCC

POWER-ON

RESET (POR)

OCSET

COMP

REFERENCE

200µA

1.27 VREF +

ERROR

AMP

OVER-

CURRENT

PWM

COMPARATOR

OSCILLATOR

10µA

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

SS BOOT

UGATE PHASE

GND

2-163

HIP6013

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

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

UGATE

UGATEILGATE

PROTECTION

OCSET Current Source I Soft Start Current I

OCSETVOCSET

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

BOOT

PHASE

= 0.3A - 5.5 10 Ω

= 4.5VDC 170 200 230 µA

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

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

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

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

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

(SOIC - Lead Tips Only)

= 12V, V

= 6V 350 500 - mA

UGATE

-10- µA

P-P

2-164

Typical Performance Curves

HIP6013

RT PULLUP

1000

100

RESISTANCE (kΩ)

10 100 1000

SWITCHING FREQUENCY (kHz)

FIGURE 1. RT RESISTANCE vs FREQUENCY FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

TO +12V

RT PULLDOWN

TO V

Functional Pin Description

OCSET

COMP

FB EN

GND

2 3 4 5 6 7

RT (Pin 1)

This pin provides oscillator switching frequency adjustment. By placing a resistor (R 200kHz switching frequency is increased according to the following equation:

510

Fs 200kHz

•

------------------+≈

Conversely, connecting a pull-up resistor (R to VCC reduces the switching frequency according to the following equation.:

410

Fs 200kHz

•

------------------–≈

) from this pin to GND, the nominal

(RT to GND)

(RT to 12V)

14 13 12 11 10

9 8

VCC NC NC NC BOOT UGATE PHASE

) from this pin

(mA)

100 200 300 400 500 600 700 800 900 1000

= 3300pF

GATE

= 1000pF

GATE

= 10pF

GATE

SWITCHING FREQUENCY (kHz)

SS (Pin 3)

Connect a capacitor from this pin to ground. This capacitor, along with an internal 10µA current source, sets the softstart interval of the converter.

COMP (Pin 4) and FB (Pin 5)

COMP and FB are the available external pins of the error ampliﬁer. The FB pin is the inverting input of the error ampliﬁer and the COMP pin is the error ampliﬁer output. These pins are used to compensate the voltage-control feedback loop of the converter.

EN (Pin 6)

This pin is the open-collector enable pin. Pull this pin below 1V to disable the converter. In shutdown, the soft start pin is discharged and the UGATE and LGATE pins are held low.

GND (Pin 7)

Signal ground for the IC.All voltage levelsare measured with respect to this pin.

PHASE (Pin 8)

Connect the PHASE pin to the upper MOSFET source. This pin is used to monitor the voltage drop across the MOSFET for over-current protection. This pin also provides the return path for the upper gate drive.

OCSET (Pin 2)

Connect a resistor (R upper MOSFET. R (I

), and the upper MOSFET on-resistance (r

OCS

OCSET

the converter over-current (OC) trip point according to the following equation:

•

PEAK

OCSROCSET

------------------------------------------- -=

DS ON()

An over-current trip cycles the soft-start function.

) from this pin to the drain of the

OCSET

, an internal 200µA current source

DS(ON)

2-165

) set

UGATE (Pin 9)

Connect UGATE to the upper MOSFET gate. This pin provides the gate drive for the upper MOSFET.

BOOT (Pin 10)

This pin provides bias voltage to the upper MOSFET driver. A bootstrap circuit may be used to create a BOOT voltage suitable to drive a standard N-Channel MOSFET.

VCC (Pin 14)

Provide a 12V bias supply for the chip to this pin.

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