Intersil Corporation HIP6015 Datasheet

HIP6015

Data Sheet March 2000

Buck Pulse-Width Modulator (PWM)
Controller and Output Voltage Monitor

The HIP6015 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
HIP6015 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 HIP6015 includes a fully
TTL-compatible 5-input digital-to-analog converter (DAC)
that adjusts the output voltage from 2.1V

0.1V increments and from 1.8V

to 2.05VDC in 0.05V

DC

steps. The precision reference and voltage-mode regulator
hold the selected output voltage to within ±1% over
temperature and line voltage variations.

The HIP6015 provides simple, single feedback loop,
voltage-mode control with fast transient response. It
includes a200kHz free-running triangle-waveoscillator 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 HIP6015 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 HIP6015
protects against over-current and over-voltage conditions by
inhibiting PWM operation. Additional built-in over-voltage
protection triggers an external SCR to crowbar the input
supply. The HIP6015 monitors the current by using the
r

DS(ON)

of the upper MOSFET which eliminates the need for

a current sensing resistor.

to 3.5VDC in

DC

File Number 4421.2

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% Over Line Voltage and Temperature

• TTL-Compatible 5-Bit Digital-to-Analog Output Voltage
Selection

- Wide Range . . . . . . . . . . . . . . . . . . . 1.8V

DC

to 3.5V

- 0.1V Binary Steps. . . . . . . . . . . . . . . 2.1VDC to 3.5V

- 0.05V Binary Steps. . . . . . . . . . . . . 1.8VDC to 2.05V

• 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

DC
DC
DC

Pinout

V

SEN

OCSET

SS
VID0
VID1
VID2
VID3
VID4

COMP

FB

1
2
3
4
5
6
7
8
9

10

HIP6015

(SOIC)

TOP VIEW

1

20
19
18
17
16
15
14
13
12
11

R

T

OVP
V

CC

NC
NC
BOOT
UGATE
PHASE
PGOOD
GND

Ordering Information

TEMP.

PART NUMBER

HIP6015CB 0 to 70 20 Ld SOIC M20.3

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

1-888-INTERSIL or 321-724-7143

RANGE (oC) PACKAGE

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.

| Copyright © Intersil Corporation 2000

PKG.

NO.

Typical Application

PGOOD

VID0
VID1
VID2
VID3
VID4

SS

OVP

R

FB

HIP6015

+12V

V

CC

MONITOR AND

PROTECTION

T

OSC

HIP6015

D/A

-

+

-

+

OCSET

BOOT

UGATE
PHASE

VIN = +5V OR +12V

+V

OUT

Block Diagram

V

SEN

OCSET

VID0
VID1
VID2
VID3
VID4

FB

REFERENCE

D/A

CONVERTER

(DAC)

COMP

200µA

DACOUT

110%

90%

115%

V

SEN

+

-

ERROR

AMP

GND

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

COMPARATOR

4V

PWM

POWER-ON

RESET (POR)

+

-

V

CC

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

PGOOD

10µA

OVP

SS

BOOT
UGATE

PHASE

COMP

R

T

OSCILLATOR

GND

2

HIP6015

Absolute Maximum Ratings Thermal Information

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V

Boot Voltage, V

BOOT

- V

. . . . . . . . . . . . . . . . . . . . . . . . +15V

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 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 a low effective thermal conductivity test board in free air. See Tech Brief 379 for details.

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

V

SUPPLY CURRENT

CC

Nominal Supply I

CC

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Rising V

Threshold - 1.26 - V

OCSET

OSCILLATOR

Free Running Frequency RT = Open 185 200 215 kHz
Total Variation 6kΩ < RT to GND < 200kΩ -15 - +15 %
Ramp Amplitude ∆V

OSC

REFERENCE AND DAC

DAC (VID0-VID4) Input Low Voltage - - 0.8 V
DAC (VID0-VID4) Input High Voltage 2.0 - - V
DACOUT Voltage Accuracy -1.0 - +1.0 %

ERROR AMPLIFIER

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

GATE DRIVER

Upper Gate Source I
Upper Gate Sink

UGATE

R

UGATE

PROTECTION

Over-Voltage Trip (V
OCSET Current Source I
OVP Sourcing Current I
Soft Start Current I

/DACOUT) - 115 120 %

SEN

OCSETVOCSET

OVP

SS

UGATE Open - 5 - mA

OCSET
OCSET

RT = Open - 1.9 - V

V

- V

BOOT

V

= 5.5V; V

SEN

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

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC

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

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

(SOIC - Lead Tips Only)

= 4.5V - - 10.4 V
= 4.5V 8.2 - - V

P-P

PHASE

= 12V, V

= 6V 350 500 - mA

UGATE

- 5.5 10 Ω

= 4.5V 170 200 230 µA

= 0V 60 - - mA

OVP

-10- µA

3

HIP6015

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

POWER GOOD

Upper Threshold (V
Lower Threshold (V
Hysteresis (V

SEN

/DACOUT) V

SEN

/DACOUT) V

SEN

/DACOUT) Upper and Lower Threshold - 2 - %

PGOOD Voltage Low V

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP
TO +12V

RT PULLDOWN TO V

10 100 1000

SWITCHING FREQUENCY (kHz)

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

Rising 106 - 111 %

SEN
SEN

PGOODIPGOOD

SS

Falling 89 - 94 %

= -5mA - 0.5 - V

40

35

C

= 3300pF

30

25

20

(mA)

CC

I

15

10

5

0

100 200 300 400 500 600 700 800 900 1000

UGATE

C

= 1000pF

UGATE

C

UGATE

SWITCHING FREQUENCY (kHz)

= 10pF

Functional Pin Description

1

V

SEN

V

SEN

OCSET

(Pin 1)

SS
VID0
VID1
VID2
VID3
VID4

COMP

FB

2
3
4
5
6
7
8
9

10

This pin is connected to the converters output voltage. The
PGOOD and OVP comparator circuits use this signal to
report output voltage status and for overvoltage protection.

OCSET (Pin 2)

Connect a resistor (R
upper MOSFET. R
(I

), and the upper MOSFET on-resistance (r

OCS

OCSET

) from this pin to the drain of the

OCSET

, an internal 200µA current source

20
19
18
17
16
15
14
13
12
11

R

T

OVP
V

CC

NC
NC
BOOT
UGATE
PHASE
PGOOD
GND

DS(ON)

) set

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

I

•

I

PEAK

OCSROCSET

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

r

DS ON()

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

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.

VID0-4 (Pins 4-8)

VID0-4 are the input pins to the 5-bit DAC. The states of
these five pins program the internal voltage reference
(DACOUT). The level of DACOUT sets the converter output
voltage. It also sets the PGOOD and OVP thresholds. Table
1 specifies DACOUT for the 32 combinations of DAC inputs.

COMP (Pin 9) and FB (Pin 10)

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.

4