HIP6028EVAL1 INTERSIL [Intersil Corporation], HIP6028EVAL1 Datasheet

HIP6028EVAL1

Manufacturer Part Number

HIP6028EVAL1

Description

Advanced PWM and Dual Linear Power Control with Integrated ACPI Support Interface

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.HIP6028EVAL1.pdf (16 pages)

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Advanced PWM and Dual Linear Power

Control with Integrated ACPI Support

Interface

The HIP6028 provides the power control and protection for

three output voltages in high-performance microprocessor

and computer applications. The IC integrates a PWM

controller, a linear regulator and a linear controller as well as

the monitoring and protection functions into a single

package. The PWM controller regulates the microprocessor

core voltage with a synchronous-rectiﬁed buck converter.

The linear controller regulates power for the GTL bus and

the linear regulator provides power for the clock driver circuit.

The HIP6028 includes an Intel-compatible, TTL 5-input

digital-to-analog converter (DAC) that adjusts the core PWM

output voltage from 2.1V

and from 1.3V

reference and voltage-mode control provide 1% static

regulation. The linear regulator uses an internal pass device

to provide a ﬁxed 2.5V 2.5%. The linear controller drives an

external N-channel MOSFET to provide a ﬁxed 1.5V 2.5%.

The HIP6028 monitors all the output voltages. A single

Power Good signal is issued when the core is within 10% of

the DAC setting and the other levels are above their under-

voltage levels. Additional built-in over-voltage protection for

the core output uses the lower MOSFET to prevent output

voltages above 115% of the DAC setting. The PWM over-

current function monitors the output current by using the

voltage drop across the upper MOSFET’s r

eliminating the need for a current sensing resistor.

The HIP6028 offers integrated ACPI S3 shutdown state

support. Through the SD1&3 pin, the microprocessor core

and GTL bus supplies can be shut down when entering

power-saving standby operation mode.

Ordering Information

HIP6028CB

HIP6028EVAL1

PART NUMBER

to 2.05V

Evaluation Board

RANGE

TEMP.

0 to 70

(

2-311

to 3.5V

in 0.05V steps. The precision

24 Ld SOIC

PACKAGE

Data Sheet

in 0.1V increments

DS(ON)

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

M24.3

PKG. NO.

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

Features

• Provides 3 Regulated Voltages

• Integrated ACPI S3-State Shutdown Support

• Drives Low Cost Transistors

• Operates from +3.3V, +5V and +12V Inputs

• Simple Control Design

• Fast Transient Response

• Excellent Output Voltage Regulation

• TTL-compatible 5-Bit Digital-to-Analog Core Output

• Power-Good Output Voltage Monitor

• Microprocessor Core Voltage Protection Against Shorted

• Over-Voltage and Over-Current Fault Monitors

• Small Converter Size

Applications

• Full Motherboard Power Regulation for Computers

• Low-Voltage Distributed Power Supplies

Pinout

- Microprocessor Core, Clock and GTL Power

- PWM Controller Drives N-MOSFETs

- Linear Controller Compatible with Both MOSFETs and

- Single-Loop Voltage-Mode PWM Control

- Fixed 1.5V GTL Output Voltage

- Fixed 2.5V Clock Output Voltage

- High-Bandwidth Error Ampliﬁer

- Full 0% to 100% Duty Ratio

- Core PWM Output: 1% Over Temperature

- Other Outputs: 2.5% Over Temperature

Voltage Selection

- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V

MOSFET

- Does Not Require Extra Current Sensing Element,

- Constant Frequency Operation; 200kHz Free-Running

NPN Bipolar Transistors

Uses MOSFET’s r

Oscillator; Programmable from 50kHz to 1MHz

PGOOD

SD1&3

FAULT

May 1998

VID4

VID3

VID2

VID1

VID0

VIN2

VCC

DS(ON)

HIP6028 (SOIC)

TOP VIEW

File Number 4630

Intersil Corporation 1999

UGATE

PHASE

LGATE

PGND

OCSET

VSEN1

COMP

VSEN3

DRIVE3

GND

VOUT2

HIP6028

to 3.5V

Related parts for HIP6028EVAL1

HIP6028EVAL1 Summary of contents

Page 1

... RANGE o PART NUMBER ( C) PACKAGE HIP6028CB SOIC HIP6028EVAL1 Evaluation Board 2-311 Features • Provides 3 Regulated Voltages - Microprocessor Core, Clock and GTL Power • Integrated ACPI S3-State Shutdown Support • Drives Low Cost Transistors - PWM Controller Drives N-MOSFETs - Linear Controller Compatible with Both MOSFETs and NPN Bipolar Transistors • ...

Page 2

Block Diagram - + 2-312 HIP6028 ...

Page 3

Simpliﬁed Power System Diagram +5V IN +3. OUT2 V OUT3 Typical Application +12V IN + +3. OUT2 2.5V C OUT2 Q3 V OUT3 1.5V C OUT3 2-313 HIP6028 LINEAR REGULATOR PWM CONTROLLER HIP6028 ...

Page 4

Absolute Maximum Ratings Supply Voltage +15V CC ...

Page 5

Electrical Speciﬁcations Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued) PARAMETER Slew Rate PWM CONTROLLER GATE DRIVER Upper Drive Source Upper Drive Sink Lower Drive Source Lower Drive Sink PROTECTION AND CONTROL V Over-Voltage ...

Page 6

Functional Pin Description VSEN1 (Pin 19) This pin is connected to the PWM converter’s output voltage. The PGOOD and OVP comparator circuits use this signal to report output voltage status and for over voltage protection. OCSET (Pin 20) Connect a ...

Page 7

VIN2 (Pin 12) This pin supplies power to the internal regulator. Connect this pin to a suitable 3.3V source. Additionally, this pin is used to monitor the 3.3V supply. If, following a startup cycle, the voltage drops below 2.05V (typically), ...

Page 8

PWM output disables all converters and drives the FAULT pin to VCC. LUV OVER CURRENT LATCH S Q OC1 S R 0.15V + COUNTER - POR SD1&3 OV FIGURE 7. FAULT ...

Page 9

V due to MOSFET switching. The over-current function IN will trip at a peak inductor current (I PEAK OCSET OCSET I = --------------------------------------------------- - PEAK OVER-CURRENT TRIP: V > SET (i • ...

Page 10

Application Guidelines Soft-Start Interval Initially, the soft-start function clamps the error amplifier’s output of the PWM converter. After the output voltage increases to approximately 80% of the set value, the reference input of the error amplifier is clamped to a ...

Page 11

IN +3.3V +12V VCC VCC GND VIN2 OCSET Q3 UGATE V OUT3 DRIVE3 PHASE HIP6028 LGATE VOUT2 SS PGND OUT2 C KEY OUT2 ISLAND ON POWER PLANE LAYER ISLAND ON CIRCUIT PLANE ...

Page 12

Compensation Break Frequency Equations ----------------------------------- = ------------------------------------------------------ - ------------------------------------------------------ - Figure 13 shows an asymptotic plot of the DC-DC ...

Page 13

The ripple voltage and current are approximated by the following equations: V – OUT OUT I ------------------------------- - --------------- - = V OUT F ...

Page 14

A separate heatsink may be necessary depending upon MOSFET power, package type, ambient temperature and air ﬂow OUT ----------------------------------------------------------- ...

Page 15

HIP6028 DC-DC Converter Application Circuit Figure 16 shows an application circuit of a power supply for a microprocessor computer system. The power supply provides the microprocessor core voltage (V bus voltage (V ) and clock generator voltage (V OUT3 from ...

Page 16

HIP6028 2-326 ...

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