LP38855T-1.2

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

The LP38855T-1.2/NOPB is a fixed-output linear low-dropout regulator manufactured by Texas Instruments, delivering a constant 1.2V output at up to 1.5A load current. It utilizes a TO-220-7 through-hole package and operates with an input voltage range of 0.9V to 15V. The device features a typical dropout voltage of 115mV at full load and maintains a quiescent current of 8.5mA. It provides high power supply rejection ratio (PSRR) of 72dB and includes comprehensive protection mechanisms such as thermal shutdown and current limiting.

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

• Provides stable 1.2V regulated output for sensitive analog and digital circuits
• Supports high continuous load currents up to 1.5A with minimal voltage drop
• Integrates robust protection against overcurrent, thermal overload, and short circuits

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

• Point-of-load regulation in embedded systems
• Power conditioning for microcontrollers and FPGAs
• Battery-powered equipment requiring efficient voltage step-down

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

Verify the exact suffix matches the required package and temperature grade. Confirm RoHS compliance status via the manufacturer datasheet. Ensure the ordering part number aligns with the specific lead time and availability constraints provided by authorized distributors. Cross-reference the pinout configuration to prevent installation errors during PCB assembly.

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

Select this component when a fixed 1.2V rail is required with moderate current demands exceeding standard LDO capabilities. The TO-220-7 package facilitates heat dissipation for sustained 1.5A operation without external cooling. Evaluate input voltage stability to ensure it remains within the specified 0.9V to 15V window for optimal PSRR performance and regulation accuracy.

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

This device belongs to the LP3885x series of ultra-low-noise, high-performance LDO regulators designed for demanding applications. It shares architectural similarities with adjustable variants like the LP38852T-ADJ but offers a fixed output to simplify circuit design. The series emphasizes low quiescent current and high PSRR, making it suitable for noise-sensitive signal processing chains.

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

LP38856SX-1.2/NOPB: Higher current capability (3A) in surface-mount packaging.