HIP6021A_01 INTERSIL [Intersil Corporation], HIP6021A_01 Datasheet

HIP6021A_01

Manufacturer Part Number

HIP6021A_01

Description

Advanced PWM and Triple Linear Power Controller

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.HIP6021A_01.pdf (16 pages)

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Advanced PWM and Triple Linear Power

Controller

The HIP6021A provides the power control and protection for

four output voltages in high-performance, graphics intensive

microprocessor and computer applications. The IC

integrates a voltage-mode PWM controller and three linear

controllers, as well as the monitoring and protection

functions into a 28 lead SOIC package.

The synchronous-rectified buck converter includes an Intel-

compatible, TTL 5-input digital-to-analog converter (DAC)

that adjusts the core PWM output voltage from 1.3V

2.05V

increments. The precision reference and voltage-mode

control provide ±1% static regulation. A TTL-compatible

signal applied to the SELECT pin dictates which method of

control is used for the AGP bus power: a low state results in

linear control of the AGP bus to 1.5V, while a high state

transitions the output through a linearly controlled softstart to

3.3V, followed by full enhancement of the external MOSFET

to pass the input voltage. The other two linear regulators

provide fixed output voltages of 1.5V GTL bus power and

1.8V power for the North/South Bridge core and/or cache

memory. These levels are user-adjustable by means of an

external resistor divider and pulling the FIX pin low. All linear

controllers can employ either N-Channel MOSFETs or

bipolar NPNs for the pass transistor.

The HIP6021A monitors all the output voltages. A single

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

the DAC setting and all other outputs 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

controller’s over-current function monitors the output current

by using the voltage drop across the upper MOSFET’s

Ordering Information

HIP6021ACB

HIP6021EVAL1

DS(ON)

PART NUMBER

in 0.05V steps and from 2.1V

Evaluation Board

RANGE (

TEMP.

0 to 70

28 Ld SOIC

Data Sheet

PACKAGE

to 3.5V

M28.3

in 0.1V

PKG.

NO.

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

1-888-INTERSIL or 1-888-468-3774

Features

• Provides 4 Regulated Voltages

• Drives N-Channel MOSFETs

• Linear Regulator Drives Compatible with both MOSFET

• Fixed or Externally Resistor-Adjustable Linear Outputs

• Simple Single-Loop Control Design

• Fast PWM Converter Transient Response

• Excellent Output Voltage Regulation

• TTL-Compatible 5-Bit DAC Core Output Voltage Selection

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

• Small Converter Size

Applications

• Motherboard Power Regulation for Computers

Pinout

- Microprocessor Core, AGP Bus, Memory, and GTL Bus

and Bipolar Series Pass Transistors

- Voltage-Mode PWM Control

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Ratio

- Core PWM Output: ±1% Over Temperature

- Other Outputs: ±3% Over Temperature

- Shutdown Feature Removed When All Inputs High

- Wide Range 1.3V

- Switching Regulator Does Not Require Extra Current

- Constant Frequency Operation

- 200kHz Free-Running Oscillator; Programmable From

- Small External Component Count

Power

Sensing Element, Uses Upper MOSFET’s r

50kHz to Over 1MHz

December 2001

FAULT/RT

SELECT

PGOOD

DRIVE2

VSEN2

VSEN4

VID4

VID3

VID2

VID1

VID0

FIX

Intersil (and design) is a trademark of Intersil Americas Inc.

HIP6021A (SOIC)

TOP VIEW

to 3.5V

HIP6021A

VCC

UGATE

PHASE

LGATE

PGND

OCSET

VSEN1

COMP

VSEN3

DRIVE3

GND

VAUX

DRIVE4

FN4793.1

DS(ON)

Related parts for HIP6021A_01

HIP6021A_01 Summary of contents

Page 1

TM Data Sheet Advanced PWM and Triple Linear Power Controller The HIP6021A provides the power control and protection for four output voltages in high-performance, graphics intensive microprocessor and computer applications. The IC integrates a voltage-mode PWM controller and three linear ...

Page 2

Block Diagram 2 HIP6021A ...

Page 3

Simplified Power System Diagram +5V IN +3. OUT2 Q4 V OUT3 Typical Application +12V IN + +3. OUT2 1. TYPEDET Q4 V OUT3 1.5V C OUT3 Q5 ...

Page 4

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

Page 5

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block and Simplified Power System Diagrams, and Typical Application Schematic (Continued) PARAMETER SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER DC Gain Gain-Bandwidth Product Slew Rate PWM CONTROLLER GATE DRIVER UGATE Source UGATE ...

Page 6

Functional Pin Descriptions VCC (Pin 28) Provide a 12V bias supply for the IC to this pin. This pin also provides the gate bias charge for all the MOSFETs controlled by the IC. The voltage at this pin is monitored ...

Page 7

COMP and FB (Pin 20 and 21) COMP and FB are the available external pins of the PWM converter error amplifier. The FB pin is the inverting input of the error amplifier. Similarly, the COMP pin is the error amplifier ...

Page 8

T2. During the interval between T2 and T3, the error amplifier reference ramps to the final value and the converter regulates the output a voltage proportional to the SS pin voltage the input clamp voltage exceeds the reference ...

Page 9

The SS pin voltage increases and the counter increments to 3. This sets the fault latch to disable the converter. The fault is reported on the FAULT/RT pin. The linear controllers operate in the same way ...

Page 10

TABLE 1. OUT1 VOLTAGE PROGRAM PIN NAME VID4 VID3 VID2 VID1 ...

Page 11

Shutdown The HIP6021A features a dedicated shutdown pin (SD). A TTL-compatible, logic high signal applied to this pin shuts down (disables) all four outputs and discharges the soft-start capacitor. Following a shutdown, a logic low signal re-enables the outputs through ...

Page 12

Pick Gain (R2/R1) for desired converter bandwidth ST 2. Place 1 Zero Below Filter’s Double Pole (~75 Place 2 Zero at Filter’s Double Pole ST 4. Place 1 Pole at the ESR Zero ND 5. Place ...

Page 13

Component Selection Guidelines Output Capacitors The output capacitors for each output have unique requirements. In general, the output capacitors should be selected to meet the dynamic regulation requirements. Additionally, the PWM converters require an output capacitor to filter the current ...

Page 14

MOSFET Considerations The HIP6021A requires 5 external transistors. Two N-Channel MOSFETs are used in the synchronous-rectified buck topology of PWM1 converter recommended that the AGP linear regulator pass element be a N-Channel MOSFET as well. The GTL and ...

Page 15

HIP6021A DC-DC Converter Application Circuit Figure 11 shows an application circuit of a power supply for a microprocessor computer system. The power supply provides the microprocessor core voltage (VOUT1), the AGP bus voltage (VOUT2), the GTL bus voltage (VOUT3), and ...

Page 16

Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α µ 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in ...

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