ISL9103, ISL9103A Data Sheet November 24, 2009 FN6828.2 500mA 2.4MHz Low I High Efficiency Features Q Synchronous Buck Converter High Efficiency Integrated Synchronous Buck Regulator with up to 95% Efficiency The ISL9103, ISL9103A is a 500mA, 2.4MHz step-down regulator, which is ideal for powering low-voltage 2.7V to 6.0V Supply Voltage microprocessors in compact devices such as PDAs and 2.4MHz PWM Switching Frequency cellular phones. It is optimized for generating low output voltages down to 0.8V. The supply voltage range is from 500mA Guaranteed Output Current 2.7V to 6V allowing the use of a single Li+ cell, three NiMH 3% Output Accuracy Over-Temperature and Line for Fixed cells or a regulated 5V input. It has guaranteed minimum Output Options output current of 500mA. A high switching frequency of 20A Quiescent Supply Current in Skip Mode 2.4MHz pulse-width modulation (PWM) allows using small external components. Under light load condition, the device Less than 1A Logic Controlled Shutdown Current operates at low I skip mode with typical 20A quiescent Q 100% Maximum Duty Cycle for Lowest Dropout current for highest light load efficiency to maximize battery life, and it automatically switches to fixed frequency PWM Ultrasonic Switching Frequency at Skip Mode to Prevent mode under heavy load condition. Audible Frequency Noise (For ISL9103A Only) The ISL9103, ISL9103A includes a pair of low Discharge Output Capacitor when Disabled ON-resistance P-Channel and N-Channel internal MOSFETs Internal Digital Soft-Start to maximize system efficiency and minimize the external Peak Current Limiting, Short Circuit Protection component count. 100% duty-cycle operation allows less than 300mV dropout voltage at 500mA. Over-Temperature Protection The ISL9103, ISL9103A offers internal digital soft-start, Chip Enable enable for power sequence, overcurrent protection and Small 6 Pin 1.6mmx1.6mm TDFN Package thermal shutdown functions. In addition, the ISL9103, ISL9103A offers a quick bleeding function that discharges Pb-Free (RoHS Compliant) the output capacitor when the IC is disabled. Applications The ISL9103, ISL9103A is offered in a 1.6x1.6mm TDFN Single Li-ion Battery-Powered Equipment package. The complete converter occupies less than 2 0.5cm . Mobile Phones and MP3 Players PDAs and Palmtops Pinout WCDMA Handsets ISL9103, ISL9103A (6 LD 1.6x1.6 TDFN) Portable Instruments TOP VIEW VIN 1 6 SW EN 2 5 GND NC 3 4 FB CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners.ISL9103, ISL9103A Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION 1VIN Input supply voltage. Typically connect a 10F ceramic capacitor to ground. 2EN Regulator enable pin. Enable the device when driven to high. Shut down the chip and discharge output capacitor when driven to low. Do not leave this pin floating. 3NC No connect leave floating. 4FB Buck converter output feedback pin. For adjustable output version, its typical value is 0.8V and connect it to the output through a resistor divider for desired output voltage for fixed output version, directly connect this pin to the converter output. 5GND Ground connection. 6SW Switching node connection. Connect to one terminal of inductor. Ordering Information OUTPUT PACKAGE PART NUMBER PART VOLTAGE (V) TEMP RANGE Tape and Reel PKG ULTRASONIC (Notes 1, 3, 4) MARKING (Note 2) (C) (Pb-Free) DWG. FUNCTION ISL9103IRUNZ-T J0 3.3 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUJZ-T J1 2.8 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUFZ-T J2 2.5 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUDZ-T J3 2.0 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUCZ-T J4 1.8 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUBZ-T J5 1.5 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUWZ-T J6 1.2 -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103IRUAZ-T J7 ADJ -40 to +85 6 Ld TDFN L6.1.6x1.6 NO ISL9103AIRUNZ-T J8 3.3 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUJZ-T J9 2.8 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUFZ-T K0 2.5 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUDZ-T K1 2.0 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUCZ-T K2 1.8 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUBZ-T K3 1.5 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUWZ-T K4 1.2 -40 to +85 6 Ld TDFN L6.1.6x1.6 YES ISL9103AIRUAZ-T K5 ADJ -40 to +85 6 Ld TDFN L6.1.6x1.6 YES NOTES: 1. Please refer to TB347 for details on reel specifications. 2. Other output voltage options may be available upon request, please contact Intersil for more details. 3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and NiPdAu plate - e4 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. 4. For Moisture Sensitivity Level (MSL), please see device information page for ISL9103, ISL9103A. For more information on MSL please see techbrief TB363. FN6828.2 2 November 24, 2009