The ISL9104, ISL9104A is a 500mA, 4. 3MHz step-down regulator, which is ideal for powering low-voltage microprocessors in compact devices such as PDAs and cellular phones. It is optimized for generating low output voltages down to 0. 8V. The supply voltage range is from 2. 7V to 6V allowing the use of a single Li+ cell, three NiMH cells or a regulated 5V input. It has guaranteed minimum output current of 500mA. A high switching frequency of 4. 3MHz pulse-width modulation (PWM) allows using small external components. Under light load condition, the device operates at low IQ skip mode with typical 20µA quiescent current for highest light load efficiency to maximize battery life, and it automatically switches to fixed frequency PWM mode under heavy load condition. The ISL9104, ISL9104A includes a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize system efficiency and minimize the external component count. 100% duty-cycle operation allows less than 300mV dropout voltage at 500mA. The ISL9104, ISL9104A offers internal digital soft-start, enable for power sequence, overcurrent protection and thermal shutdown functions. In addition, the ISL9104, ISL9104A offers a quick bleeding function that discharges the output capacitor when the IC is disabled. The ISL9104, ISL9104A is offered in a 1. 6x1. 6mm µTDFN package. The complete converter occupies less than 0. 5CM2.

Features

  • High Efficiency Integrated Synchronous Buck Regulator with up to 93% Efficiency
  • 2.7V to 6.0V Supply Voltage
  • 4.3MHz PWM Switching Frequency
  • 500mA Guaranteed Output Current
  • 3% Output Accuracy Over-Temperature and Line for Fixed Output Options
  • 20µA Quiescent Supply Current in Skip Mode
  • Less than 1µA Logic Controlled Shutdown Current
  • 100% Maximum Duty Cycle for Lowest Dropout
  • Ultrasonic Switching Frequency at Skip Mode to Prevent Audible Frequency Noise (For ISL9104A Only)
  • Discharge Output Capacitor when Disabled
  • Internal Digital Soft-Start
  • Peak Current Limiting, Short Circuit Protection
  • Over-Temperature Protection
  • Chip Enable
  • Small 6 Pin 1.6mmx1.6mm µTDFN Package
  • Pb-Free (RoHS Compliant)

Applications

  • Single Li-ion Battery-Powered Equipment
  • Mobile Phones and MP3 Players
  • PDAs and Palmtops
  • WCDMA Handsets
  • Portable Instruments

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability
Active uTDFN Reel 3000
Availability
Active uTDFN Reel 250
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL9104, ISL9104A Datasheet Datasheet PDF 791 KB
User Guides & Manuals
ISL9104xxxxEVAL1Z, ISL9104AxxxxEVAL1Z User Guide Manual PDF 405 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN9208: High Frequency Power Converters Application Note PDF 592 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN9210: A New Pspice Subcircuit For The Power MOSFET Featuring Global Temperature Options Application Note PDF 650 KB
AN9209: A Spice-2 Subcircuit Representation For Power MOSFETs Using Empirical Methods Application Note PDF 387 KB
AN7244: Understanding Power MOSFETs Application Note PDF 349 KB
PCNs & PDNs
PCN10114 - Part Marking Configuration Change for Intersil TDFN, uTDFN, and uTQFN Packaged Products Product Change Notice PDF 205 KB

Boards & Kits

Part Number Title Type Company
ISL9104AxEVAL1Z 500mA 4.3MHz Synchronous Buck Converter Evaluation Boards Evaluation Renesas
ISL9104xEVAL1Z 500mA 4.3MHz Synchronous Buck Converter Evaluation Boards Evaluation Renesas