1
®
ISL8011EVAL1Z: 1.2A Integrated FETs, High
Efficiency Synchronous Buck Regulator
ISL8011 is an integrated FET, 1.2A synchronous buck
regulator for general purpose point-of load applications
. It is
optimized for generating low output voltages down to 0.8V.
The supply voltage range of 2.7V to 5.5V allows the use of
common 3.3V or 5V supply rails and Lithium ion battery
inputs. It has a guaranteed minimum output current of 1.2A
and a 1.5MHz pulse-width modulation (PWM) switching
frequency which allows the use of small external
components.
The ISL8011 includes a pair of low ON-resistance P-Channel
and N-Channel internal MOSFETs to maximize efficiency
and minimize external component count. 100% duty-cycle
operation allows less than 200mV dropout voltage at 1.2A.
The ISL8011 offers a 200ms Power-On-Reset (POR) timer
at power-up. When shut down, the ISL8011 discharges the
output capacitor. Other features include internal digital
soft-start, enable for power sequence, overcurrent
protection, and thermal shut-down.
The ISL8011 is offered in a 10 Ld 3x3mm DFN package with
1mm maximum height. The complete converter occupies
less than 1cm
2
area.
Features
• High Efficiency Synchronous Buck Regulator with up to
95% Efficiency
• 2.7V to 5.5V Supply Voltage
• 1.2A Guaranteed Output Current
• 100% Maximum Duty Cycle
• Peak Current Limiting, Short Circuit Protection
• 200ms Power-On Reset
• 3% Output Accuracy Over Temperature/Load/Line
• Less than 1µA Logic Controlled Shut-down Current
• Internal Loop Compensation
• Internal Digital Soft-Start
• Over-Temperature Protection
• Enable
• Small 10 Ld 3x3mm DFN Package
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
Pinout
ISL8011
(10 LD 3x3 DFN)
TOP VIEW
Ordering Information
PART NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL8011IRZ 011Z -40 to +85 10 Ld 3x3 DFN L10.3x3C
ISL8011IRZ-T 011Z -40 to +85 10 Ld 3x3 DFN
Tape and Reel
L10.3x3C
ISL8011EVAL1Z Evaluation Board
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.
2
3
4
1
5
9
8
7
10
6
PVIN
VCC
EN
POR
GND
PHASE
PGND
SGND
FB
N/C
June 7, 2007 AN1329.0Application Note
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. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
