The ISL6522 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The output voltage of the converter can be precisely regulated to as low as 0. 8V, with a maximum tolerance of ±1% over temperature and line voltage variations. The ISL6522 provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0-100%. The ISL6522 protects against overcurrent conditions by inhibiting PWM operation. The ISL6522 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.


  • Drives two N-Channel MOSFETs
  • Operates from +5V or +12V input
  • Simple single-loop control design
  • Voltage-mode PWM control
  • Fast transient response
  • High-bandwidth error amplifier
  • Full 0-100% duty ratio
  • Excellent output voltage regulation
  • 0.8V internal reference
  • ±1% over line voltage and temperature
  • Overcurrent fault monitor
  • Does not require extra current sensing element
  • Uses MOSFETs rDS(ON)
  • Converter can source and sink current
  • Small converter size
  • Constant frequency operation
  • 200kHz free-running oscillator programmable from 50kHz to over 1MHz
  • 14-lead SOIC and TSSOP package and 16-lead 5x5mm QFN Package
  • QFN Package
  • Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline.
  • Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
  • Pb-Free Available (RoHS Compliant)


  • Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPC microprocessors
  • High-power 5V to 3xV DC-DC regulators
  • Low-voltage distributed power supplies

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 60
Active QFN Reel 6000
Active QFN Reel 1000
Active QFN Tube 60
Active QFN Reel 6000
Active QFN Reel 1000

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL6522 Datasheet Datasheet PDF 818 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
PCN14026 - Alternate Manufacturing Facilities for Assembly of the Listed Intersil TQFN/QFN Packaged Products - Carsem (CAS) - Ipoh, Malaysia Product Change Notice PDF 108 KB
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site Product Change Notice PDF 152 KB
ISL6522 iSim:PE Model Schematic SXSCH 156 KB
PLC17019 - Q2 Cy 17 General PLC Notice Product Life Cycle Notice PDF 320 KB
TB417: Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators Other PDF 562 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