The ISL78840ASEH, ISL78841ASEH, ISL78843ASEH, ISL78845ASEH, ISL78840ASRH, ISL78841ASRH, ISL78843ASRH, ISL78845ASRH are high-performance, radiation hardened drop-in replacements for the popular 28C4x and 18C4x PWM controllers suitable for a wide range of power conversion applications including boost, flyback and isolated output configurations. Fast signal propagation and output switching characteristics make these ideal products for existing and new designs. Features include up to 13.2V operation, low operating current, 90μA typical start-up current, adjustable operating frequency to 1MHz, and high peak current drive capability with 50ns rise and fall times.

Features

  • Electrically screened to DLA SMD # 5962-07249
  • QML qualified per MIL-PRF-38535 requirements
  • 1A MOSFET gate driver
  • 90μA typical start-up current, 125μA maximum
  • 35ns propagation delay current sense to output
  • Fast transient response with peak current-mode control
  • 9V to 13.2V operation
  • Adjustable switching frequency to 1MHz
  • 50ns rise and fall times with 1nF output load
  • Trimmed timing capacitor discharge current for accurate dead time/maximum duty cycle control
  • 1.5MHz bandwidth error amplifier
  • Tight tolerance voltage reference over line, load, and temperature
  • ±3% current limit threshold
  • Pb-free available (RoHS compliant)
  • Radiation environment:
  • High dose rate (50 - 300rad(Si)/s): 100krad(Si)
  • Low dose rate (0.01rad(Si)/s): 100krad(Si)*
    * Product capability established by initial characterization. The "EH" version is acceptance tested on a wafer-by-wafer basis to 50krad(Si) at low dose rate. (Applies to ISL7884xASEH only)

Applications

  • Current mode switching power supplies
  • Isolated buck and flyback regulators
  • Boost regulators
  • Direction and speed control in motors
  • Control of high current FET drivers

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ DLA SMD Buy Sample
ISL78840ASRHD/PROTO
Active SBDIP Tray 1
Availability
ISL78840ASRHF/PROTO
Active CFP Tray 1
Availability
ISL78840ASRHQD
Active SBDIP Tray 1 5962R0724901QPC
Availability
ISL78840ASRHQF
Active CFP Tray 1 5962R0724901QXC
Availability
ISL78840ASRHVD
Active SBDIP Tray 1 5962R0724901VPC
Availability
ISL78840ASRHVF
Active CFP Tray 1 5962R0724901VXC
Availability
ISL78840ASRHVX
Active 100 5962R0724901V9A
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL78840ASEH, ISL78841ASEH, ISL78843ASEH, ISL78845ASEH ISL78840ASRH, ISL78841ASRH, ISL78843ASRH, ISL78845ASRH, ISL738840ASEH, ISL738841ASEH, ISL738843ASEH, ISL738845ASEH Datasheet Datasheet PDF 927 KB
Application Notes & White Papers
Wafer by Wafer Low Dose Rate Acceptance White Paper White Paper PDF 533 KB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
PCNs & PDNs
PCN11004 - Product Improvement - Design Change for Intersil Product ISL7884xARH / DSCC SMD 5962-07249 Product Change Notice PDF 194 KB
PCN10123 - Alternate Die Attach Material for Assembly of Intersil Hermetic Packaged Products - Intersil Palm Bay, FL. (ISP) Product Change Notice PDF 230 KB
Downloads
iSim:PE Software v8.40 Software EXE 157.43 MB
ISL7884x PSPICE Model Model ZIP 30.70 MB
Other
Intersil Space Products Brochure Brochure PDF 3.14 MB
ISL78845ASRH Total Dose Test Report Report PDF 322 KB
PIN19011 - Price Increase for the Listed Renesas Electronics America (REA) Radiation Hardened Space Products Price Increase Notice PDF 360 KB
Standard Microcircuit Drawing 5962-07249 (ISL78840ASRH, ISL78841ASRH, ISL78843ASRH, ISL78845ASRH, ISL78840ASEH, ISL78841ASEH, ISL78843ASEH, ISL78845ASEH, ISL738840ASEH, ISL738841ASEH, ISL738843ASEH, ISL738845ASEH) Other 0 KB
ISL7884xASRH Flyback Application iSim:PE Model Schematic SXSCH 161 KB
ISL78845ASEH Neutron Test Report Report PDF 370 KB
ISL78843ASRH, ISL78845ASRH SEE Test Report Report PDF 1.83 MB
Intersil Commercial Lab Services Brochure PDF 364 KB
PA11095 - Packing Method Change for Intersil 8-pin Ceramic Solder Seal Dual-In-Line (SBDIP) Packaged Products Product Advisory PDF 176 KB
PA11003 - Packing Method Change for Intersil TO-xx Metal Can and Flat Pack Packaged Products Product Advisory PDF 499 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

News & Additional Resources