L5150CS

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

The L5150CS is an automotive-grade low dropout linear regulator manufactured by STMicroelectronics. It features a fixed 5 V output voltage with ±2% accuracy, maintained across wide temperature ranges and load variations. The device operates within a DC supply voltage range of 5.6 V to 40 V and delivers a maximum internally limited output current. Typical quiescent current consumption is 55 μA at very low output currents. The component includes integrated microprocessor control functions such as power-on reset, low-voltage reset, and early warning circuits.

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

• Integrated microprocessor control functions including power-on reset, low-voltage reset, and early warning monitoring.
• High output voltage accuracy of ±2% achieved through on-chip trimming over wide temperature and load variations.
• Early warning circuit monitors input voltage against an internal reference for system protection.
• Requires only low-value ceramic capacitors on the output for stability.

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

• Automotive electronic systems requiring AEC-Q100 qualified components
• Microprocessor power supply units needing precise voltage regulation
• Circuits requiring programmable reset pulse delay via external capacitor

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

Verify the specific suffix CS indicates the correct package variant and temperature grade during procurement. Confirm that the 5.6 V minimum operating voltage aligns with your system's input supply capabilities. Ensure the design accommodates the internally limited maximum output current to prevent thermal issues. Validate that the required reset threshold adjustments are compatible with the external voltage divider configuration specified in the official datasheet.

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

Select this component when a stable 5 V rail is required for automotive applications with input voltages up to 40 V. It is suitable for designs prioritizing low quiescent current and high accuracy without complex external compensation networks. Consider the adjustable reset threshold feature if system supervision logic requires custom voltage trip points. Verify that the thermal performance meets the junction temperature requirements under maximum load conditions.

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

The L5150CS belongs to the L5150 series of low dropout linear regulators from STMicroelectronics, designed specifically for automotive environments. This family integrates essential supervisory functions typically found in separate voltage supervisor ICs, simplifying the bill of materials. The series is characterized by its ability to maintain precision output voltage accuracy despite significant line and load variations, making it robust for demanding automotive electrical loads.

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

How is the reset threshold adjusted?

The output voltage reset threshold can be adjusted down to 3.5 V using an external voltage divider connected to the device.

What protection features are included?

The device includes internal temperature protection that disables the output, short-circuit protection, and an early warning circuit that monitors the input voltage.