Overview

The ISL85033 is a dual standard buck regulator capable of 3A per channel 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 ISL85033 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 ISL85033 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 ISL85033 is available in a small 4mmx4mm Thin Quad Flat No-Lead (TQFN) Pb-free package.

ISL85033 Functional Diagram
ISL85033 Functional Diagram
  • 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
  • Pb-free (RoHS compliant)

Applications

  • General purpose point of load DC/DC power conversion
  • Set-top boxes
  • FPGA power and STB power
  • DVD and HDD drives
  • LCD panels, TV power
  • Cable modems

Documentation

Design & Development

Software & Tools
iSim:PE Offline Simulation Tool
iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
Downloads
ISL85033 Current Share iSim:PE ModelISL85033 Dual iSim:PE Model
 Simulator Renesas
1 item

Software Downloads
Type Title Date
PCB Design Files
ISL85033CRSHEVAL1Z Design Files
ZIP 797 KB
1 item
ISL85033-12VEVAL3Z Buck Regulator Eval Board

ISL85033-12VEVAL3Z

Evaluation
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Wide VIN Dual Standard Buck Regulator Evaluation Board In a Negative Output Voltage Configuration

The ISL85033 is a wide input range, dual standard buck converter that can be configured to provide a negative output voltage. The ISL85033-12VEVAL3Z evaluation board is...

Featured Documents:
ISL85033-12VEVAL3Z User Guide
ISL85033DUALEVAL1Z Buck Regulator Eval Board

ISL85033DUALEVAL1Z

Evaluation
Learn More

Wide VIN Dual Standard Buck Regulator Evaluation Board

The ISL85033DUALEVAL1Z evaluation kit is intended for use by individuals with requirements for point-of-load (POL) applications sourcing from 4.5V to 28V. The...

Featured Documents:
ISL85033DUALEVAL1Z User Guide
ISL85033EVAL2Z Buck Regulator Eval Board

ISL85033EVAL2Z

Evaluation
Learn More

Wide VIN Dual Standard Buck Regulator with 3A/3A Continuous Output Current Evaluation Board

The ISL85033EVAL2Z evaluation kit is used to demonstrate the performance of the ISL85033 switching regulator IC. An input range of 4.5V to 28V and 3A output per channel...

Featured Documents:
ISL85033EVAL2Z (Short Form) User Guide

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

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    Price (USD) | 1ku
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    ISL85033IRTZ
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    		2033 Dec TQFN Tube 1 Get Samples,
    ISL85033IRTZ-T
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    Samples Available
    		 2033 Dec TQFN Reel 1 Get Samples,
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