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PDF ISL6571 Data sheet ( Hoja de datos )

Número de pieza ISL6571
Descripción Complementary MOSFET Driver and Synchronous Half-Bridge Switch
Fabricantes Intersil Corporation　
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®
Data Sheet
February 2003
ISL6571
FN9082.2
Complementary MOSFET Driver and
Synchronous Half-Bridge Switch
The Intersil ISL6571 provides a new approach for
implementing a synchronous rectified buck switching
regulator. The ISL6571 replaces two power MOSFETs, a
Schottky diode, two gate drivers and synchronous control
circuitry. Its main applications address high-density power
conversion circuits including multiphase-topology computer
microprocessor core power regulators, ASIC and memory
array regulators, etc. Another useful feature of the ISL6571
is the compatibility with three-state input control: left open,
the PWM input turns off both output drives. The ISL6571
operates in continuous conduction mode reducing EMI
constraints and enabling high bandwidth operation.
Ordering Information
TEMP.
PART NUMBER RANGE (oC) PACKAGE
ISL6571CR
0 to 70 68 Ld MLFP
ISL6571CR-T
0 to 70 68 Ld MLFP
ISL6571EVAL1 Evaluation Board
PKG. NO.
L68.10x10A
L68.10x10A
Features
• Improved Performance over Conventional Synchronous
Buck Converter using Discrete Components
• Optimal Deadtime Provided by Adaptive Shoot-Through
• Switching Frequency up to 1MHz
- High-Bandwidth, Fast Transient Response
- Small, Low Profile Converters
• Reduced Connection Parasitics between Discrete
Components
- Low Electromagnetic Emissions
• Low Profile, Low Thermal Impedance Packaging
- High Power Density Applications
Applications
• Multiphase Power Regulators
• Low-Voltage Switchmode Power Conversion
• High-Density Power Converters
Pinout
ISL6571 (MLFP)
TOP VIEW
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
PHASE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
69
PHASE
71
GND
70
VIN
51 NC
50 GND
49 NC
48 PWM
47 BOOT
46 GND
45 PHASE
44 VIN
43 VIN
42 VIN
41 VIN
40 VIN
39 VIN
38 VIN
37 VIN
36 VIN
35 VIN
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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ISL6571 pdf
ISL6571
Typical Performance Curves/Setup
+12V
+5V
+12V
CVCC
CPVCC
∆ILOUT(p-p)
VOUT
ROUT
CVIN
VCC PVCC BOOT VIN
CBOOT
PWM
CONTROL
AND
DRIVERS
ISL6571
GND
PGND
LOUT
PHASE
COUT
VOUT
ROUT
FIGURE 4. TYPICAL TEST CIRCUIT
126
VPVCC = 5V
108 VPVCC = 10V
IPHASE = 0A
90
1.26
1.08
0.90
72 0.72
54 0.54
36 0.36
18 0.18
00
100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
FIGURE 6. BIAS SUPPLY CURRENT/POWER vs FREQUENCY
4.00
3.50
VPVCC = 5V
ILOUT = 12A
LOUT = 1µH
3.00
2.50
2.00
1.50
200 300
400 500 600 700 800
SWITCHING FREQUENCY (kHz)
900 1000
FIGURE 8. ISL6571 POWER DISSIPATION vs FREQUENCY
AT 12A
1.8
1.6 VGS = 10V
ID = 12A
1.4
1.2
1.0
0.8
0.6
-25
0
25 50 75 100 125 150
Tj (oC)
FIGURE 5. UPPER MOSFET ON RESISTANCE vs
TEMPERATURE
1.6
VGS = 10V
1.4 ID = 20A
1.2
1.0
0.8
0.6
-25
0
25
50
Tj
(oC)75
100 125
FIGURE 7. LOWER MOSFET ON RESISTANCE vs
TEMPERATURE
150
4.00
3.50
3.00
VPVCC = 5V
LOUT = 1µH
12Vin/1.5Vout
2.50
2.00
750kHz
500kHz
300kHz
200kHz
1.50
1.00
0.50
0
0 1.5 3.0 4.5 6.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5
OUTPUT CURRENT (A)
FIGURE 9. ISL6571 POWER DISSIPATION vs CURRENT at
200kHz, 300kHz, 500kHz, 750kHz
5

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