HIP5020 Datasheet, PDF (1/15 Pages) Intersil Corporation – Integrated-Power Buck Converter Controller with Synchronous Rectification

Data Sheet
HIP5020
January 1997
File Number 4243
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 - 75mΩ 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
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
HIP5020DB
0 to 70 28 Ld SOIC
PKG.
NO.
M28.3
• Adaptive Dead-Time - Eliminates Shoot-Through
• 100kHz to 1MHz PWM Switching Frequency
• Thermally Enhanced SOIC Package
Applications
Pinout
HIP5020 (SOIC)
TOP VIEW
VIN 1
VIN 2
VIN 3
PHASE 4
PHASE 5
6
PGND ⁷
(WEB) ₈
9
GND 10
FB 11
VINF 12
HMI 13
SLOPE 14
28 PHASE
27 PHASE
26 SD
25 SOFT
24 OVLD
23
22 _PGND
21 ^(WEB)
20
19 CP-
18 CP+
17 VCC
16 BOOT
15 CT
• Notebook Computers
• Portable Telecommunications
• Portable Instruments
Typical Application
HIP5020
MODE
CONTROL AND
V_IN
PROTECTION
INTERNAL
SUPPLY
100
V_IN = 6V
95
V_O = 5V
90
V_IN = 5V
V_O = 3.3V
85
80
0.001 0.01 0.1 1 10
L1
LOAD CURRENT (A)
14µH
440µF
C1 ^VOUT
REGULATION
AND CONTROL
2-13
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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