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ISL8502 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL8502
部品説明 2.5A Synchronous Buck Regulator
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 



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ISL8502 Datasheet, ISL8502 PDF,ピン配置, 機能
®
Data Sheet
January 17, 2007
ISL8502
FN6389.0
2.5A Synchronous Buck Regulator with
Integrated MOSFETs
The ISL8502 is a synchronous buck controller with internal
MOSFETs packaged in a small 4mmx4mm QFN package.
The ISL8502 can support a continuous load of 2.5A and has
a very wide input voltage range. With the switching
MOSFETs integrated into the IC, the complete regulator
footprint can be very small and provide a much more
efficient solution than a linear regulator.
The ISL8502 is capable of stand alone operation or it can be
used in a master slave combination for multiple outputs that
are derived from the same input rail. Multiple slave channels
(up to six) can be synchronized. This method minimizes the
EMI and beat frequencies effect with multi-channel
operation.
The switching PWM controller drives two internal N-Channel
MOSFETs in a synchronous-rectified buck converter
topology. The synchronous buck converter uses voltage-
mode control with fast transient response. The switching
regulator provides a maximum static regulation tolerance of
±1% over line, load, and temperature ranges. The output is
user-adjustable by means of external resistors down to 0.6V.
The output is monitored for undervoltage events. The
switching regulator also has overcurrent protection. Thermal
shutdown is integrated. The ISL8502 features a bidirectional
Enable pin that allows the part to pull the enable pin low
during fault detection.
Pinout
ISL8502
(24 LD QFN)
TOP VIEW
24 23 22 21 20 19
PGOOD 1
18 VIN
SGND 2
17 PHASE
EN 3
SYNCH 4
M/S 5
GND
25
16 PHASE
15 PHASE
14 PHASE
FS 6
13 PGND
7 8 9 10 11 12
Features
• Over 2.5A Continuous Output Current
• Integrated MOSFETs for Small Regulator Footprint
• Adjustable Switching Frequency, 500kHz - 1.2MHz
• Tight Output Voltage Regulation, ±1% Over Temperature
• Wide Input Voltage Range, 5V ±10% or 5.5V to 14V
• Wide Output Voltage Range, from 0.6V
• Simple Single-Loop Voltage-Mode PWM Control Design
• Input Voltage Feed-Forward for Constant Modulator Gain
• Fast PWM Converter Transient Response
• Lossless rDS(ON) High Side and Low Side Overcurrent
Protection
• Undervoltage Detection
• Integrated Thermal Shutdown Protection
• Power Good Indication
• Adjustable Soft-Start
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
Point of Load Applications
Graphics Cards - GPU and Memory Supplies
• ASIC Power Supplies
• Embedded Processor and I/O supplies
• DSP Supplies
Ordering Information
PART
PART
TEMP.
NUMBER MARKING RANGE (°C) PACKAGE
PKG.
DWG. #
ISL8502IRZ* 85 02IRZ -40 to +85 24 Ld 4x4 QFN L24.4x4D
(Note)
(Pb-free)
*Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1 b CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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