
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
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.
RANGE (
o
C)
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
(WEB)
PHASE
PGND
(WEB)
L1
C1
V
OUT
V
IN
MODE
CONTROL AND
PROTECTION
HIP5020
14
μ
H
440
μ
F
0.001
0.01
LOAD CURRENT (A)
0.1
1
10
80
85
90
95
100
V
IN
= 5V
V
O
= 3.3V
E
V
IN
= 6V
V
O
= 5V
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
|
Copyright
Intersil Corporation 1999