ISL71001M

6A Synchronous Buck Regulator with Integrated MOSFETs

OVERVIEW

The ISL71001M is a radiation tolerant and high efficiency monolithic synchronous buck regulator with integrated MOSFETs. This single chip power solution operates across an input voltage range of 3V to 5.5V and provides a tightly regulated output voltage that is externally adjustable from 0.8V to ~85% of the input voltage with an output load current capacity of 6A. The ISL71001M is available in a plastic 64 Ld Thin Quad Flatpack (EP-TQFP) package.

The ISL71001M uses peak current-mode control for excellent output load transient response and features integrated compensation and switches at a fixed frequency of 1MHz to reduce component size and count. In applications where two regulators are needed, two ISL71001M devices can be synchronized 180° out-of-phase to reduce the overall input RMS ripple current. The internal synchronous power switches are optimized for high efficiency and good thermal performance.

The ISL71001M incorporates fault protection for the regulator. The protection circuits include input undervoltage, output undervoltage, and output overcurrent.

High integration makes the ISL71001M an ideal choice to power many of today’s small form factor applications. Two devices can be synchronized to provide a complete power solution for large scale digital ICs, like Field Programmable Gate Arrays (FPGAs), that require separate core and I/O voltages.

KEY FEATURES

  • Passes NASA low outgassing specifications
  • Operates from 3V to 5.5V supply
  • Programmable power-on reset level
  • Current mode control for excellent dynamic response
  • Fixed 1MHz switching frequency
  • ±1.2% reference voltage
  • Thermally enhanced heat-sink plastic package
  • Highly efficient: 95% peak efficiency
  • Bidirectional SYNC pin allows two devices to be synchronized 180° out-of-phase
  • Adjustable output voltage
  • Analog soft-start
  • Output undervoltage and output overcurrent protection
  • Power-good output voltage monitor
  • Tin (Sn) free lead finish
  • Characterized radiation level
  • 30krad(Si) at a low dose rate
  • Single-event effects at LET = 43MeV•cm2/mg

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL71001M
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
1
Input Voltage Min (V)
3
Input Voltage Max (V)
5.5
Output Voltage Min (V)
0.85
Output Voltage Max (V)
4.675
Output Current Max (A)
6
IQ
1.4 mA
Switching Freq. (max) (MHz)
1.18
Switching Freq. (min) (MHz)
0.82
Low Dose Rate (ELDRS) krad (Si)
30
SEL (MeV/mg/cm2)
43
Peak Efficiency (%)
95
SYNCH Capability
Yes
Control Type
Current Mode
Switching Frequency Range (MHz)
1 MHz Fixed
Temperature Range
-55 to +125

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