SCT71401F33TYFR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The SCT71401F33TYFR is a low-dropout linear regulator from the SCT71401 series, designed for input voltages ranging from 3V to 40V with a 45V transient tolerance. It delivers a fixed 3.3V output at up to 150mA, featuring a typical quiescent current of 2.5µA. The device ensures high accuracy with ±1% precision at 25°C and ±2% over the -40°C to 125°C range. It incorporates internal soft-start, short-circuit protection with over-current foldback, and thermal shutdown. Stability is maintained using output capacitors between 3.3µF and 220µF, with recommended ceramic values around 10µF.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low quiescent current design suitable for battery-powered portable devices
• Integrated over-current foldback and thermal protection for enhanced reliability
• Wide input voltage range accommodating high-voltage transients
• Fixed 3.3V output with tight voltage accuracy specifications

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-operated handheld devices
• Microcontroller (MCU) power supplies in always-on systems
• CAN/LIN transceiver power regulation
• Industrial control instrumentation
• Smoke detectors and POS terminals

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the suffix TYFR indicates the specific tape-and-reel packaging configuration and temperature grade as defined by the manufacturer. Confirm the fixed 3.3V output variant matches the system requirement. Ensure compatibility with the required output capacitance range for stability. Cross-reference the pinout for SOT23-5 or SOT89-3 packages if applicable to the specific reel version.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a wide input voltage range up to 40V is required alongside minimal standby current consumption. The fixed 3.3V output eliminates external resistor networks, simplifying PCB layout. Consider the low dropout characteristics for efficiency near the minimum input voltage. Verify that the load current does not exceed 150mA and that the thermal dissipation capabilities of the chosen package are sufficient for the operating environment.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The SCT71401 series comprises low-dropout linear regulators optimized for high-voltage inputs and low-power applications. This family supports various fixed output voltages including 1.2V, 1.8V, 2.5V, 3V, 4.2V, 4.5V, 5V, and 3.3V. The series is engineered for portability and industrial use, offering robust protection features against shorts and overloads while maintaining stability across a broad temperature range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The SGM2203 is documented as an alternative part number for the SCT71401 series. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.