The ISL70005SEH is the only point-of-load (POL) power solution that reduces size, weight, and power (SWaP) by integrating a sync regulator and low-load device (LDO) into a monolithic IC. This device enables satellite manufacturers to reduce their bill of materials (BOM) footprint and power supply requirements for their medium Earth orbit (MEO) and geosynchronous Earth orbit (GEO) long-duration mission profiles.
The ISL70005SEH dual-output rad-hard POL regulator combines 95 percent high efficiency with the sync regulator and a low 75 mV dropout with the LDO regulator. The device allows for easier thermal management in systems with 3.3V or 5V power buses and can support a continuous output load current of 3A for the buck regulator and ±1A for the LDO. The buck regulator utilizes a voltage-mode control architecture and switches at an adjustable resistance frequency from 100 kHz to 1 MHz, enabling a smaller filter size.
The space-grade ISL70005SEH simplifies design configuration, allowing designers to use it as a dual-output regulator, a DDR memory power solution, or a high-efficiency, low-noise regulator for RF applications. The flexible LDO can generate and reduce current and accept input voltages as low as 775 mV to minimize unnecessary power dissipation. Externally adjustable loop compensation on the buck converter allows users to achieve an optimal balance of stability and dynamic output performance. The device is accepted for wafers up to 100 krad(Si) on HDR (High Dose Rate) and is tested with ELDRs up to 75 krad(Si) on LDR (Low Dose Rate). The SEE (Single Event Effects) test shows no SEL (Single Event Latch-up) or SEB (Single Event Burnout) at a linear energy transfer (LET) of up to 86 MeV*cm²/mg. Single-event transients (SET) have been characterized over a LET range of 8.5 to 86 MeV*cm²/mg.
Key features of the ISL70005SEH dual-output POL regulator:
Synchronous Vin range of 3V to 5.5V;
LDO Vin range of 600mV + VDO to Vcc-1.5V;
1% reference voltage accuracy;
Separate indicators for VIN, enable, soft start, and turn-on;
Stable LDO with 150 µF. 3 times less output capacitance than competitive solutions.
Full military temperature range from -55°C to +150°C.
The ISL70005SEH is a single-chip power supply solution for FPGA cores and I/O channels and can be combined with Renesas' analog signal chain ICs to create a satellite telemetry solution: ISL70444SEH 40V quad op-amp, ISL71840SEH 30V 16-channel multiplexer, ISL70591SEH 100µA precision current source, and ISL71090SEH12 1.25V precision voltage reference.
The ISL70005SEH also combines with other Renesas power management integrated circuits to form a complete power solution that includes redundancy, protection, and sequencing for high-processing FPGAs: PML ISL70061SEH 10A load switch, quad power supply sequencer ISL70321SEH, LDL ISL75051ASEH 3A, and inverter regulator ISL70003ASEH 9A.
- Details
- Category: Integrated Circuits
Radiation-hardened single-chip synchronous regulator and LDO for satellite power applications
Renesas Electronics Corporation introduces the first single-chip synchronous regulator and LDO (Low Dropout) targeting low-power FPGAs, DDR memory and other digital loads for spaceflight payload applications.
Print Magazine
Annual subscription price:
You will receive all 10 editions that are published each year.
social networks
Popular News Electronics
Spanish electronics magazine. Printed for over 25 years.
Spain - Madrid - All rights reserved © Convertronic Professional Spanish Electronics Magazine.