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)
- 50% lower shutdown supply current than the ISL70001SEH
- Available in a thermally enhanced heatsink package - R48.B
- Highly efficient: 94% peak efficiency
- 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
- 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
- Radiation hardness
- Total dose [50-300rad(Si)/s]: 100krad(Si)
- Total dose [<10mrad(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.
- 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
Description
The ISL70001ASEH is a radiation hardened and Single-Event Effect (SEE) hardened high-efficiency monolithic synchronous buck regulator 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. The ISL70001ASEH utilizes 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 an application where two POLs are needed, two ISL70001ASEH 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 ISL70001ASEH incorporates fault protection for the regulator. The protection circuits include input undervoltage, output undervoltage, and output overcurrent. High integration and class-leading radiation tolerance make the ISL70001ASEH 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.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| Control Mode | Peak Current Mode |
| IOUT Rail 1 (max) (A) | 6 |
| No-Load Operating Current | 40 mA |
| Outputs (#) | 1 |
| Quiescent Current | 2mA |
| Supply Voltage Rail 1 (min) (V) | 3 |
| Supply Voltage Rail 1 (max) (V) | 5.5 |
| Switching Frequency (min) (kHz) | 1000 |
| Switching Frequency (max) (kHz) | 1000 |
| VOUT Rail 1 (min) (V) | 0.6 |
| VOUT Rail 1 (max) (V) | 4.675 |
| Temp. Range (°C) | -55 to +125°C |
| TID HDR (krad(Si)) | 100 |
| TID LDR (krad(Si)) | 100 |
| DSEE (MeV·cm2/mg) | 86, 86.4 |
| Flow | RH Hermetic |
| Qualification Level | Class V, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
Application Block Diagrams
 | Radiation Hardened Versal Power Tree A radiation hardened power supply for satellite applications using AMD Versal. |
Additional Applications
- FPGA, CPLD, DSP, CPU core or I/O voltages
- Low-voltage, high-density distributed power systems
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Support Communities
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ISL70001ASEH AVDD pin current
What is the operating supply current for AVDD (pin 19)? What is the operating supply current for DVDD (pins 13 and 14)? AVDD and DVDD supply currents are needed to properly size the 1Ω resistors.
May 8, 2025 -
ISL70001ASEH
Hi, I´m working with only 1 ISL70001ASEH and I have a question. I can´t find information about that in the datasheet the PIN 7 M/S, the datasheet says. the PIN 6 SYNC, the datasheet says. and the question is: What do I have to do with ...
May 24, 2023
Knowledge Base
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What is the best way to measure the open-loop phase and gain on the ISL70001 and ISL70002 rad hard switching regulators on your demo boards?
Question: I am evaluating the following demo boards and I want to measure the open-loop phase and gain of the switching regulator. ISL70001SRHEVAL1Z ISL70001ASEHEV1Z ISL70002SEHEVAL1Z What is the best way to complete this? Answer:For both of the ISL70001x boards, remove the jumper, J15, and place the analyzer probes ...
Support Communities
