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LEO3910PDT

STMicroelectronics
Linear Voltage Regulator IC Positive Adjustable 1 Output 2A PowerSO-20
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Overview

The LEO3910PDT is a radiation-hardened positive adjustable linear voltage regulator capable of delivering up to 2A of output current. Designed by STMicroelectronics for harsh environments, it operates over an input voltage range of 3V to 12V and features a 50 krad(Si) Total Ionizing Dose (TID) rating.

Why Choose This Part

This regulator is characterized for outgassing (RML < 1%) and is Single Event Latch-up (SEL) free up to 62 MeV.cm2/mg. It offers high reliability with gold wires and whisker-free lead finishing, combined with integrated protection features including adjustable current limitation and overtemperature shutdown.

Applications

Satellite Power Subsystems
Providing regulated power to FPGA cores, ASICs, and memory in Low Earth Orbit (LEO) satellite missions.
Radiation-Hardened Instrumentation
Powering sensor suites and data acquisition systems in high-radiation environments where SEL immunity is required.
Space-Grade Computing
Acting as a local point-of-load regulator for rad-hard microprocessors and communication interfaces.

Key Specifications

PSRR 50dB (33kHz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 20-PowerSOIC (0.433", 11.00mm Width)
Control Features Inhibit
Current - Output 2A
Protection Features Antisaturation, Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 12V
Voltage Dropout (Max) 1.5V @ 2A
Voltage - Output (Max) 9V
Supplier Device Package PowerSO-20
Current - Quiescent (Iq) 6 mA
Voltage - Output (Min/Fixed) 1.23V

Getting Started

When designing with the LEO3910PDT, ensure the PowerSO-20 thermal slug is properly soldered to a large ground plane to manage heat dissipation at 2A loads. Use the Inhibit pin for power sequencing and refer to the datasheet to calculate the external resistor divider for the desired output voltage between 1.23V and 9V.

Categories

Power Management > LDO Voltage Regulators FPGAs & CPLDs Microcontrollers > STMicroelectronics