ISL8009A| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

ISL8009A
Data Sheet May 27, 2008 FN6656.1

1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator
The ISL8009A is a high efficiency, monolithic, synchronous step-down DC/DC regulator that can deliver up to 1.5A continuous output current. 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 single Li+cell, three NiMH cells or a regulated 5V input. The ISL8009A uses current mode control architecture to deliver very low duty cycle operation at high frequency with fast transient response and excellent loop stability. It has flexible operation mode selection of forced PWM mode and automatic PFM/PWM with as low as 17uA quiescent current, achieving high power conversion efficiency under light load condition, hence maximizing battery life. High 1.6MHz pulse-width modulation (PWM) switching frequency allows the use of small external components. The ISL8009A integrates a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty-cycle operation allows less than
400mV dropout voltage at 1.5A output current. The ISL8009A offers a 2ms Power-On-Reset (POR) timer at power-up. The timer output can be reset by RSI. When shutdown, ISL8009A discharges the output capacitor through a 100 resistor. Other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown. The ISL8009A is offered in a 2mmx3mm 8 Ld DFN package with 1mm maximum height. The complete converter occupies less than 1cm2 area.

Features
High Efficiency Synchronous Buck Regulator with up to 95% Efficiency 2ms Reset Timer 2.7V to 5.5V Supply Voltage 3% Output Accuracy Over-Temperature/Load/Line 1.5A Guaranteed Output Current 17uA Quiescent Supply Current in PFM Mode Selectable Forced PWM Mode and PFM Mode Less Than 1uA Logic Controlled Shutdown Current 90% Maximum Duty Cycle for Lowest Dropout at 1.5A Internal Current Mode Compensation Internal Digital Soft-Start Peak Current Limiting, Short Circuit Protection Over-Temperature Protection Enable Soft Discharge Disable Small 8 Ld 2mmx3mm DFN Pb-Free (RoHS Compliant)

Applications
DC/DC POL Modules uC/uP, FPGA and DSP Power Plug-in DC/DC Modules for Routers and Switchers Portable Instruments Test and Measurement Systems

Ordering Information
PART NUMBER (Note) ISL8009AIRZ-T* TEMP. RANGE PART ( C) MARKING 09A PACKAGE (Pb-free) PKG. DWG. #

Pinout
ISL8009A (8 LD DFN) TOP VIEW

-40 to +85 8 Ld 2x3 DFN L8.2x3

*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.
VIN EN POR SKIP 1 2 3 4 8 7 6 5 LX GND VFB RSI

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. 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners.