2-13

File Number

4243

HIP5020

Integrated-Power Buck Converter

Controller with Synchronous Rectification

The HIP5020 is a high-efficiency, buck converter controller

with synchronous rectification and integral power MOSFETs.

Integrated current sensing eliminates the external resistor

and saves power. The controller combines two methods of

regulation: Current mode control for outstanding regulation

response to large signal load transients, and Hysteretic

mode control for high efficiency at low output currents.

The HIP5020 controller offers a high degree of flexibility.

Small components set the switching frequency, the soft-start

interval and the load current boundary between Run and

Hysteretic modes. These adjustments enable the designer

to best optimize the trade-offs of cost, efficiency and size.

The example application guide section illustrates these

trade-offs with component and vendor suggestions for three

circuit designs. These designs are suitable for use without

modification. However, the block diagram, detailed

description and HIP5020 component specifications enable

further optimization to meet specific requirements.

Features

• High Efficiency - Above 95%

• Integrated N-Channel Synchronous Rectifier

and Upper MOSFETs - 75m

Ω Each

• Wide Input Voltage and Load Range

- 4.5VDC to 18VDC (5 to 12 NiCd Battery Cells)

- Up to 3.5ADC

• Automatically Switches Regulation Mode

- Current Mode Control for Excellent Performance at

High Load Currents

- Hysteretic Control for High Efficiency at Light Load

Currents

• Flexible and Easy to Use

- Ready-to-Use Example Applications

- Custom Optimization with Small Components

- Design and Simulation Software Available

• Integrated, Low-Loss Current Sensing

• Over-Current Protection

• Adaptive Dead-Time - Eliminates Shoot-Through

• 100kHz to 1MHz PWM Switching Frequency

• Thermally Enhanced SOIC Package

Applications

• Notebook Computers

• Portable Telecommunications

• Portable Instruments

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HIP5020DB

0 to 70

28 Ld SOIC

M28.3

Pinout

HIP5020 (SOIC)

TOP VIEW

Typical Application

VIN

VIN

VIN

PHASE

GND

FB

VINF

HMI

SLOPE

PHASE

OVLD

SOFT

SD

CP-

CP+

VCC

BOOT

CT

PHASE

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

PGND

PHASE

(WEB)

PGND

(WEB)

L1

C1

MODE

CONTROL AND

PROTECTION

HIP5020

14

µH

440

µF

0.001

0.01

0.1

1

10

80

85

90

95

100

LOAD CURRENT (A)

INTERNAL

SUPPLY

REGULATION

AND CONTROL

Data Sheet

January 1997

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

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