intersil HIP6521 DATA SHEET

TM

HIP6521

Data Sheet August 2000

PWM and Triple Linear Power Controller

The HIP6521 provides the power control and protection for
four output voltages in high-performance microprocessor
and computer applications. The IC integrates a voltage­mode PWMcontroller and three linear controllers, as well as
monitoring and protection functions into a 16-lead SOIC
package. The PWM controller is intended to regulate the
microprocessor memory core voltage with a synchronous­rectified buck converter. The linear controllers are intended
to regulate the computer system’s AGP 1.5V bus power,the

2.5V clock power, and the 1.8V power for the North/South
Bridge core voltage and/or cache memory circuits. Both the
switching regulator and linear voltage references provide
±2% of static regulation over line, load, and temperature
ranges. All outputs are user-adjustable by means of an
external resistor divider. All linear controllers employ bipolar
NPNs for the pass transistors.

The HIP6521 monitors all the output voltages. The PWM
controller’s adjustable overcurrent function monitors the
output current by using the voltage drop across the upper
MOSFET’s r

. The linear regulator outputs are

DS(ON)

monitored via the FB pins for undervoltage events.

Ordering Information

PKG.

PART NUMBER TEMP. RANGE (oC) PACKAGE

HIP6521CB 0 to 70 16 Ld SOIC M16.15
HIP6521EVAL1 Evaluation Board

NO.

Applications

•

Motherboard Power Regulation for Computers

File Number 4837.1

Features

• Provides 4 Regulated Voltages

- Memory Core, AGP, Clock, and Memory Controller Hub
Power

• ACPI Compatible

• Drives Bipolar Linear Pass Transistors

• Externally Resistor-Adjustable Outputs

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Ratio

• Excellent Output Voltage Regulation

- All Outputs: ±2% Over Temperature

• Overcurrent Fault Monitors

- Switching Regulator Does Not Require Extra Current
Sensing Element, Uses MOSFET’s r

DS(ON)

• Small Converter Size

- 300kHz Constant Frequency Operation

- Small External Component Count

Related Literature

• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”

Pinout

HIP6521 (SOIC)

TOP VIEW

16
15
14
13
12
11
10

9

FB3
DRIVE3
FB4
DRIVE4
OCSET
VCC
LGATE
PGND

DRIVE2

FB2

FB

COMP

GND

PHASE

BOOT

1
2
3
4
5
6
7
8UGATE

1

1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000

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

Block Diagram

VCC

VCC

FB3

OCSET

2

DRIVE3

DRIVE4

FB4

DRIVE2

FB2

EA3

-

+

EA4

+

-

0.8V

INHIBIT/SOFT-START

+

-

EA2

-

+

x 0.70

+

UV3

+

-

UV4

40µA

-

SOFT-

START

AND FAULT

+

-

UV2

LOGIC

+

-

EA1

+

-

COMP1

OCC

+

+

-

-

PWM

POWER-ON

RESET (POR)

HIP6521

BOOT

DRIVE1

UGATE

PHASE

GATE

CONTROL

VCC

GND

OSCILLATOR

FB

COMP

SYNC

DRIVE

LGATE

PGND

Simplified Power System Diagram

HIP6521

+5VSB (+5V

+5V

+3.3V

DUAL

DUAL

)

IN

Typical Application

+5V

SB

+5V

DUAL

L

IN

V

V

OUT3

OUT2

C

IN

Q1

Q3

+

Q4

+

+

LINEAR

CONTROLLER

LINEAR

CONTROLLER

VCC

HIP6521

PWM

CONTROLLER

LINEAR

CONTROLLER

Q2

Q5

+

+

V

OUT4

V

OUT1

V

2.5V

+3.3V

+3.3V

OUT2

DUAL

V

OUT3

1.8V

V

OUT4

1.5V

IN

DRIVE2

Rp2

DRIVE3

Rp3

DRIVE4

FB2

HIP6521

FB3

FB4

GND

C

C

OUT3

OUT4

Q3

OUT2

Rs4

Rs2

Rs3

Rp4

+

C

Q4

+

Q5

+

BOOT

OCSET

UGATE
PHASE

LGATE
PGND

FB

COMP

Q1

Q2

C

CR1

Rp1

BOOT

L

OUT1

C

OUT1

Rs1

V

OUT1

2.5V

+

3

HIP6521

Absolute Maximum Ratings Thermal Information

UGATE, BOOT. . . . . . . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to 15V

VCC, PHASE. . . . . . . . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to +7V

DRIVE, LGATE, all other pins . . . . . . . . GND - 0.3V to VCC + 0.3V

ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBD

Operating Conditions

Supply Voltage on VCC. . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±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 TB379 for details.

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block and Simplified Power System

Diagrams, and Typical Application Schematic

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

VCC SUPPLY CURRENT

Nominal Supply Current I

CC

POWER-ON RESET

Rising VCC Threshold 4.25 - 4.5 V
Falling VCC Threshold 3.75 - 4.0 V

OSCILLATOR AND SOFT-START

Free Running Frequency F
Ramp Amplitude ∆V
Soft-Start Interval T

OSC

OSC
SS

REFERENCE VOLTAGE

Reference Voltage (All Regulators) V

REF

All Outputs Voltage Regulation -2.0 - +2.0 %
LINEAR REGULATORS (OUT2, OUT3, AND OUT4)
Output Drive Current (All Linears) VCC > 4.5V 100 120 - mA
Undervoltage Level (VFB/V

)V

REF

UV

SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER

DC Gain -80- dB
Gain-Bandwidth Product GBWP 15 - - MHz
Slew Rate SR COMP = 10pF - 6 - V/µs

PWM CONTROLLER GATE DRIVERS

UGATE Source I
UGATE Sink I
LGATE Source I
LGATE Sink I

UGATE
UGATE
LGATE
LGATE

PROTECTION

OCSET Current Source I

OCSET

UGATE, LGATE, DRIVE2, DRIVE3, and
DRIVE4 Open

VCC = 5V, V
V

UGATE-PHASE

VCC = 5V, V
V

LGATE

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

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

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

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

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

(SOIC - Lead Tips Only)

-5- mA

275 300 325 kHz

- 1.5 - V

6.25 6.83 7.40 ms

- 0.800 - V

-70- %

= 2.5V - -1 - A

UGATE

= 2.5V - 1 - A

= 2.5V - -1 - A

LGATE

= 2.5V - 2 - A

34 40 46 µA

P-P

4