ISL8500
®
Data Sheet
December 10, 2007
FN6611.0
2A Standard Buck PWM Regulator
Features
• Standard Buck Controller with Integrated Switching Power
MOSFET
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.
• Integrated Boot Diode
• Input Voltage Range
- Fixed 5V ±10%
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.
- 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
ISL8500 is available in a small 4mmx3mm Dual Flat No-Lead
(DFN) package.
• Overcurrent Protection
• Thermal Overload Protection
• Internal 5V LDO regulator
Ordering Information
PART
Applications
• General Purpose
NUMBER
(Note)
PART
TEMP.
PACKAGE
(Pb-free)
PKG.
DWG. #
MARKING RANGE (°C)
ISL8500IRZ
500Z
-40 to +85 12 Ld DFN
-40 to +85 12 Ld DFN
L12.4x3
L12.4x3
• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-Compact
Flash Cards
ISL8500IRZ-T* 500Z
• Hand-Held Instruments
• LCD Panel
*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.
• Set-top Box
Pinout
ISL8500
(12 LD DFN)
TOP VIEW
VIN
12
11
10
9
FB
COMP
SS
1
2
3
4
5
6
VIN
PHASE
PHASE
BOOT
VDD
DFN 4x3
EN
PG
8
GND
7
GND
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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