ISL85001_09 Datasheet, PDF (1/15 Pages) Intersil Corporation – 1A Standard Buck PWM Regulator

®
Data Sheet
March 17, 2009
ISL85001
FN6769.1
1A Standard Buck PWM Regulator
The ISL85001 is a high-performance, simple output
controller that provides a single, high frequency power
solution for a variety of point-of-load applications. The
ISL85001 integrates a 1A standard buck PWM controller and
switching MOSFET.
The PWM controller in the ISL85001 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 for up to 1A 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
ISL85001 power-good signal output indicates loss of
regulation on the PWM output.
ISL85001 is available in a small 4mmx3mm Dual Flat
No-Lead (DFN) package.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL85001IRZ 501Z
-40 to +85 12 Ld DFN L12.4x3
ISL85001IRZ-T* 501Z
-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 1A
• ±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
• Pb-Free (RoHS compliant)
Applications
• General Purpose
• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-Compact
Flash Cards
• Hand-Held Instruments
• LCD Panel
• Set-top Box
Pinout
ISL85001
(12 LD 4X3 DFN)
TOP VIEW
FB 1
COMP 2
SS 3
EN 4
PG 5
GND 6
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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