The ISL6540A is an improved version of the ISL6540 single-phase voltage-mode PWM controller with input voltage feed-forward compensation to maintain a constant loop gain for optimal transient response, especially for applications with a wide input voltage range. Its integrated high speed synchronous rectified MOSFET drivers and other sophisticated features provide complete control and protection for a DC/DC converter with minimum external components, resulting in minimum cost and less engineering design efforts. The output voltage of the converter can be precisely regulated with an internal reference voltage of 0. 591V, and has an improved system tolerance of ±0. 68% over commercial temperature and line load variations. An external voltage can be used in place of the internal reference for voltage tracking/DDR applications. The ISL6540A has an internal linear regulator or external linear regulator drive options for applications with only a single supply rail. The internal oscillator is adjustable from 250kHz to 2MHz. The integrated voltage margining, programmable pre-biased soft-start, differential remote sensing amplifier, and programmable input voltage POR features enhance the ISL6540A value.

Features

  • VIN and Power Rail Operation from +3.3V to +20V
  • Fast Transient Response - 0 to 100% Duty Cycle
  • 15MHz Bandwidth Error Amplifier with 6V/µs Slew Rate
  • Voltage-Mode PWM Leading and Trailing-Edge Modulation Control
  • Input Voltage Feedforward Compensation
  • 2.9V to 5.5V High Speed 2A/4A MOSFET Gate Drivers
  • Tri-state for Power Stage Shutdown
  • Internal Linear Regulator (LR) - 5.5V Bias from VIN
  • External LR Drive for Optimal Thermal Performance
  • Voltage Margining with Independently Adjustable Upper and Lower Settings for System Stress Testing and Over Clocking
  • Reference Voltage I/O for DDR/Tracking Applications
  • Improved 0.591V Internal Reference with Buffered Output
  • ±0.68%/±1.0% Over Commercial/Industrial Range
  • Source and Sink Overcurrent Protections
  • Low-and High-Side MOSFET rDS(ON) Sensing
  • Overvoltage and Undervoltage Protections
  • Small Converter Size - QFN package
  • Oscillator Programmable from 250kHz to 2MHz
  • Differential Remote Voltage Sensing with Unity Gain
  • Programmable Soft-Start with Pre-Biased Load Capability
  • Power-Good Indication with Programmable Delay
  • EN Input with Voltage Monitoring Capability
  • Pb-Free (RoHS Compliant)

Applications

  • Power Supply for some Microprocessors and GPUs
  • Wide and Narrow Input Voltage Range Buck Regulators
  • Point of Load Applications
  • Low-Voltage and High Current Distributed Power Supplies

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 60
Availability
Active QFN Reel 6000
Availability
Active QFN Tube 60
Availability
Active QFN Tube 60
Availability
Active QFN Reel 6000
Availability
Active QFN Reel 6000
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL6540A Datasheet Datasheet PDF 991 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCNs & PDNs
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida Product Change Notice PDF 294 KB
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL Product Change Notice PDF 183 KB
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump Product Change Notice PDF 173 KB
PCN10083 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 79 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 248 KB
PCN10019 - Moisture Sensitivity Level Change for Intersil ISL6540*, ISL6540A*, and ISL8118* Products Product Change Notice PDF 61 KB
Other
ISL6540A iSim:PE Model Schematic SXSCH 186 KB

Software & Tool Pages

Title Type Description Company
iSim:PE Offline Simulation Tool Simulator 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. Renesas