The ISL78208 is a dual standard buck regulator capable of 3A per channel with continuous output current. With an input range of 4. 5V to 28V, it provides a high frequency power solution for a variety of point of load applications. The PWM controller in the ISL78208 drives an internal switching N-Channel power MOSFET and requires an external Schottky diode to generate the output voltage. The integrated power switch is optimized for excellent thermal performance up to 3A of output current. The PWM regulator switches at a default frequency of 500kHz and it can be user programmed or synchronized from 300kHz to 2MHz. The ISL78208 utilizes peak current mode control to provide flexibility in component selection and minimize solution size. The protection features include overcurrent, UVLO and thermal overload protection. The ISL78208 is available in 5mmx5mm 32 Ld Wettable Flank Quad Flat Pb-free (WFQFN) package. The ISL78208 is rated for the automotive temperature range (-40°C to +105°C).


  • Wide input voltage range from 4.5V to 28V
  • Adjustable output voltage with continuous output current up to 3A
  • Current mode control
  • Adjustable switching frequency from 300kHz to 2MHz
  • Independent power-good detection
  • Selectable In-phase or out-of-phase PWM operation
  • Independent, sequential, ratiometric or absolute tracking between outputs
  • Internal 2ms soft-start time
  • Overcurrent/short circuit protection, thermal overload protection, UVLO
  • Boot undervoltage detection
  • Qualified for automotive applications
  • Pb-Free (RoHS compliant)


  • DSP and embedded processor power supply
  • Infotainment system power

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active WFQFN Tube 60
Active WFQFN Reel 6000
Active WFQFN Reel 250

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL78208 Datasheet Datasheet PDF 1.81 MB
Application Notes & White Papers
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCN16019 - Assembly site change for the Listed Intersil WFQFN Packaged Products Product Change Notice PDF 78 KB
PCN14039 - Data Sheet Specification Change for Intersil Product ISL78208* Product Change Notice PDF 288 KB
PCN14006 - Test Site Change for the Listed Intersil Products Product Change Notice PDF 168 KB