ISL70001SEH

Radiation Hardened and SEE Hardened 6A Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL70001SEH, ISL70001SRH are radiation hardened and SEE hardened high efficiency monolithic synchronous buck regulators with integrated MOSFETs. This single chip power solution operates over 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. Output load current capacity is 6A for TJ < +145°C.

High integration and class leading radiation tolerance makes the ISL70001SEH, ISL70001SRH ideal choices 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.

In applications where the ENABLE input is tied high to PVIN we recommend that the input voltage ramp rate be equal to or greater than 10V/ms. This is to prevent unwanted voltage from prematurely appearing on the output.

For a PVIN voltage that has a slower ramp rate or is stepped up we recommend use of the ISL70001ASEH. Ensuring that the ENABLE input is held low until the chosen VINPOR is satisfied will prevent this ‘false start’.

KEY FEATURES

  • ±1% reference voltage over line, load, temperature and radiation
  • Current mode control for excellent dynamic response
  • Full Mil-temp range operation (TA = -55°C to +125°C)
  • High efficiency >90%
  • Fixed 1MHz operating frequency
  • Available in a thermally enhanced heatsink package - R48.B
  • Operates from 3V to 5.5V supply
  • Adjustable output voltage
  • Two external resistors set VOUT from 0.8V to ~85% of VIN
  • Bidirectional SYNC pin allows two devices to be synchronized 180° out-of-phase
  • Starts into prebiased load
  • Power-good output voltage monitor
  • Adjustable analog soft-start
  • Input undervoltage, output undervoltage and output overcurrent protection
  • Electrically screened to DLA SMD 5962-09225
  • QML qualified per MIL-PRF-38535 requirements
  • EH version is wafer-by-wafer acceptance tested for ELDRS
  • Radiation hardness
  • Total dose [50-300rad(Si)/s]: 100krad(Si) (min)
  • Total dose [<10mrad(Si)/s]: 50krad(Si) (min)
  • SEE hardness
  • SEL and SEB LETeff: 86.4MeV/mg/cm2 (min)
  • SEFI X-section (LETeff = 86.4MeV/mg/cm2) 1.4 x 10-6 cm2 (max)
  • SET LETeff (<1 pulse perturbation) 86.4MeV/mg/cm2 (min)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL70001SEH
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Outputs
1
Topology [Rail 1]
Buck
Input Voltage Min (V) [Rail 1]
3
Input Voltage Max (V) [Rail 1]
5.5
Output Voltage Min (V) [Rail 1]
0.6
Output Voltage Max (V) [Rail 1]
85% x VIN
Output Current Max (A) [Rail 1]
6
Switching Freq. (max) (MHz)
1
Switching Freq. (min) (MHz)
1
Max Duty Cycle (%)
90
Peak Efficiency (%)
94
POR
Yes
SYNCH Capability
Yes
Control Type
Current Mode
Switching Frequency Range (MHz)
1 to 1
Class
V, /PROTO
DLA SMD
5962-09225
High Dose Rate (HDR) krad (Si)
100
Low Dose Rate (ELDRS) krad (Si)
50
SEL (MeV/mg/cm2)
86.4
SMD URL
Qualification Level
QML Class V (space)
Temperature Range
-55 to +125

Featured Evaluation Tools

ISL70005SEHEV2Z radiation hardened, 3A buck regulator and 1A source/sink LDO Evaluation Board

Evaluation Kit

ISL70005SEHEV2Z

The ISL70005SEHEV2Z eval board is designed to evaluate the performance of the radiation hardened ISL70005SEH 3A buck regulator and 1A source/sink LDO.

ISL70005SEHDEMO1Z radiation hardened, 3A buck regulator and 1A source/sink LDO Demonstration Board

Demonstration Kit

ISL70005SEHDEMO1Z

The ISL70005SEHDEMO1Z demo board is designed to demonstrate the performance of the ISL70005SEH rad hard, 3A buck regulator and 1A source/sink LDO.

Action Needed