The ISL8014A is a high efficiency, monolithic, synchronous step-down DC/DC converter that can deliver up to 4A continuous output current from a 2. 8V to 5. 5V input supply. It uses a current control architecture to deliver very low duty cycle operation at high frequency with fast transient response and excellent loop stability. The ISL8014A 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 4A output current. High 1MHz pulse-width modulation (PWM) switching frequency allows the for use of small external components and the SYNC input enables multiple ICs to synchronize out-of-phase to reduce ripple and eliminate beat frequencies. The ISL8014A can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads. Fault protection is provided by internal hiccup mode current limiting during short circuit and overcurrent conditions, an output overvoltage comparator and over-temperature monitor circuit. A power-good output voltage monitor indicates when the output is in regulation. The ISL8014A is offered in a space saving 4mmx4mm QFN, lead free package with exposed pad lead frames for low thermal resistance. The ISL8014A offers a 1ms power-good (PG) timer at power-up. When shutdown, ISL8014A discharges the output capacitor. Other features include internal soft-start, internal compensation, overcurrent protection, and thermal shutdown. The ISL8014A is offered in a 16 Ld 4mmx4mm QFN package with 1mm maximum height. The complete converter occupies less than 0. 4in2 area.


  • High efficiency synchronous buck regulator with up to 97% efficiency
  • Power-good (PG) output with a 1ms delay
  • 2.8V to 5.5V supply voltage
  • 3% output accuracy over-temperature/load/line
  • 4A output current
  • Pin compatible to ISL8013A
  • Start-up with prebiased output
  • Internal soft-start - 1ms
  • Soft-stop output discharge during disabled
  • 35µA quiescent supply current in PFM mode
  • Selectable forced PWM mode and PFM mode
  • External synchronization up to 4MHz
  • Less than 1µA logic controlled shutdown current
  • 100% maximum duty cycle
  • Internal current mode compensation
  • Peak current limiting and hiccup mode short-circuit protection
  • Over-temperature protection
  • Small 16 Ld 4mmx4mm QFN
  • Pb-Free (RoHS compliant)


  • 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
  • Li-ion Battery Powered Devices
  • Small Form Factor (SFP) Modules
  • Bar Code Readers

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 75
Active QFN Reel 6000
Active QFN Reel 250

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL8014A Datasheet Datasheet PDF 1.74 MB
User Guides & Manuals
ISL8014AEVAL2Z User Guide Manual PDF 483 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
PCN10069 - Alternate Manufacturing Site for Intersil ISL8013* and ISL8014* Products - STATS ChipPAC Malaysia Product Change Notice PDF 49 KB

Boards & Kits

Part Number Title Type Company
ISL8013AEVAL2Z 3A/4A High-Efficiency Synchronous Buck Regulator Evaluation Board Evaluation Renesas
ISL8014AEVAL2Z 3A/4A High-Efficiency Synchronous Buck Regulator Evaluation Board Evaluation Renesas