ISL8500 Datasheet, PDF (1/15 Pages) Intersil Corporation – 2A Standard Buck PWM Regulator

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Data Sheet
December 10, 2007
ISL8500
FN6611.0
2A Standard Buck PWM Regulator
The ISL8500 is a high-performance, simple output controller
that provides a single, high frequency power solution for a
variety of point-of-load applications. The ISL8500 integrates
a 2A standard buck PWM controller and switching MOSFET.
The PWM controller in the ISL8500 drives an internal
switching N-Channel power MOSFET and requires an
external Schottky diode to generate an output voltage from
0.6V to 19V. The integrated power switch is optimized for
excellent thermal performance up to 2A of output current.
The standard buck input voltage range supports a fixed 5V
or variable 5.5V to 25V range. The PWM regulator switches
at a fixed frequency of 500kHz and utilizes simple voltage
mode control with input voltage feed forward to provide
flexibility in component selection and minimize solution size.
Protection features include overcurrent, undervoltage and
thermal overload protection integrated into the IC. The
ISL8500 power good signal output indicates loss of
regulation on the PWM output.
ISL8500 is available in a small 4mmx3mm Dual Flat No-Lead
(DFN) package.
Ordering Information
PART
NUMBER
(Note)
PART
TEMP.
PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
ISL8500IRZ 500Z
-40 to +85 12 Ld DFN L12.4x3
ISL8500IRZ-T* 500Z
-40 to +85 12 Ld DFN L12.4x3
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
Features
• Standard Buck Controller with Integrated Switching Power
MOSFET
• Integrated Boot Diode
• Input Voltage Range
- Fixed 5V ±10%
- Variable 5.5V to 25V
• PWM Output Voltage Adjustable from 0.6V to 19V with
Continuous Output Current up to 2A
• ±1% VFB Tolerance
• Voltage Mode Control with Voltage Feed Forward
• Fixed 500kHz Switching Frequency
• Externally Adjustable Soft-Start Time
• Output Undervoltage Protection
• Enable Inputs
• PGOOD Output
• Overcurrent Protection
• Thermal Overload Protection
• Internal 5V LDO regulator
Applications
• General Purpose
• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-Compact
Flash Cards
• Hand-Held Instruments
• LCD Panel
• Set-top Box
Pinout
ISL8500
(12 LD DFN)
TOP VIEW
FB 1
COMP 2
SS 3
EN 4
PG 5
GND ⁶
DFN 4x3
GND
12 VIN
11 VIN
10 ^PHASE
9 PHASE
8 BOOT
7 VDD
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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