Overview

Description

The ISL70005SEH is radiation hardened dual output Point-of-Load (POL) regulator combining the high efficiency of a synchronous buck regulator with the low noise of a Low Dropout (LDO) regulator. They are suited for systems with 3.3V or 5V power buses and can support continuous output load currents of 3A for the buck regulator and ±1A for the LDO. The buck regulator uses a voltage mode control architecture and switches at a resistor adjustable frequency of 100kHz to 1MHz. Externally adjustable loop compensation allows for an optimum balance between stability and output dynamic performance. The internal synchronous power switches are optimized for high efficiency and excellent thermal performance. The LDO is completely configurable independent of the switching regulator. It uses NMOS pass devices and separate chip bias voltage (L_VCC) to drive its gate, enabling the LDO to operate with a very low voltage at the L_VIN input. The LDO can sink and source up to 1A continuously, making it an ideal choice to power DDR memory. The ISL70005SEH is available in a space-saving 28 Ld ceramic dual flat-pack package or in die form. It is specified to operate across a temperature range of TA = -55 °C to +125 °C.

Features

  • Electrically screened to DLA SMD 5962-19209
  • Dual output regulator: 3A Synchronous buck and ±1A LDO
  • DDR, DDR2, DDR3, and DDR4 VDDQ/VTT regulator
  • Independent EN, SS, and PG indicators
  • ±1% reference voltage
  • 1A current sourcing/sinking capability on LDO
  • External clock synchronization: 100kHz to 1MHz
  • Full military temperature range operation
    • TA = -55 °C to +125 °C
    • TJ = -55 °C to +150 °C
  • TID Rad Hard Assurance (RHA) testing
    • HDR (50-300rad(Si)/s): 100krad(Si)
    • LDR (0.01rad(Si)/s): 75krad(Si)
  • SEE hardness (see test report)
    • No DSEE with VDD = 6.0V at LET 86.4MeV•cm2/mg
    • No SEFI at LET 43MeV•cm2/mg

Comparison

Applications

Applications

  • Point-of-load for low power FPGA core
  • Auxiliary and I/O supply voltages
  • DDR memory power for VDDQ and VTT rails
  • Distributed power system of satellite payloads

Documentation

Design & Development

Software & Tools

Software & Tools

Software title
Software type
Company
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.
Simulator Renesas
1 item

Software Downloads

Type Title Date
PCB Design Files ZIP 1.06 MB
PCB Design Files ZIP 2.01 MB
2 items

Boards & Kits

Boards & Kits

Models