Microchip MCP1790-5002E/DB Fixed LDO Regulator, 5V 70mA, SOT-223-3

The Microchip MCP1790-5002E/DB is a robust 3-pin low dropout voltage regulator specifically engineered for demanding automotive applications. This fixed output regulator delivers a stable 5V output at up to 70mA, with a tight ±2.5% output voltage tolerance over the full temperature range. Rated for a continuous input voltage of up to 30V, it is also load dump protected for up to 48V (43.5V ±10%) for 180ms with a 30-second repetition rate, ensuring reliable operation during heavy transients and double-battery jumps.

Designed with a ceramic output cap for stability, this regulator works seamlessly with ceramic, tantalum, and electrolytic capacitors. It features excellent performance metrics, including typical load regulation of ±0.2%, line regulation of ±0.0002% per volt, and a high PSRR of -90dB at 100Hz. The device includes essential protection features such as thermal shutdown and short-circuit current foldback, safeguarding your electronics under fault conditions.

Key specifications

• Fixed output voltage: 5V
• Output current: 70mA
• Input voltage range: 6V to 30V
• Dropout voltage: 700mV (typical)
• Low quiescent current: 70µA (typical)
• Operating temperature range: -40°C to +125°C
• Package: SOT-223-3, surface mount

Optimised for power management in automotive electronics, this regulator offers dependable voltage conversion in harsh conditions. Its compact SOT-223 package allows for efficient heat dissipation and minimal board space, making it a practical choice for space-constrained automotive modules.