TPL903218-S5TR

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

The TPL903218-S5TR is a fixed-output linear regulator from the TPL9032 series, manufactured by 3PEAK. It provides a regulated output voltage of 1.8 V with a maximum output current of 300 mA. The device operates within an input voltage range of 1.75 V to 5.5 V and maintains an output accuracy of ±2% across line, load, and temperature variations. Key electrical specifications include a dropout voltage of 180 mV at full load, a power supply rejection ratio (PSRR) of 87.9 dB at 10 kHz, and an output noise voltage of 8.6 μVRMS. It features thermal shutdown and over-current protection, operating reliably within a junction temperature range of –40°C to +125°C.

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

• Ultra-low noise performance with 8.6 μVRMS output voltage noise for sensitive analog applications
• High power supply rejection ratio (PSRR) of 87.9 dB at 10 kHz to suppress input ripple
• Integrated reverse current protection to prevent backflow when input voltage drops below output
• Stable operation with small ceramic capacitors, requiring only 1 μF or larger on the output

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

• Portable and battery-powered equipment
• Mobile phones and tablets
• Digital cameras and audio devices power supply
• Video surveillance systems
• High-performance analog devices and high-definition imaging equipment

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

Verify the specific ordering suffix S5TR corresponds to the SOT23-5 package and tape-and-reel transport media. Confirm that the marking code L8K matches the required identification for quality control. Ensure the component meets RoHS compatibility and halogen-free requirements as defined by the manufacturer's green product standards before finalizing procurement orders.

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

Select this part when a stable 1.8 V rail is required with minimal noise impact on downstream circuits. The low dropout characteristic supports efficient regulation from slightly higher input sources. Verify that the application load does not exceed 300 mA and that the PCB layout allows for adequate thermal dissipation to maintain junction temperatures within the specified operational limits under worst-case conditions.

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

This component belongs to the TPL9032 series of low-dropout linear regulators designed for high precision and low noise. The series offers various fixed output voltages ranging from 0.9 V to 5 V in multiple package options including SOT23-5, DFN1x1-4, and WLCSP-4. The TPL903218-S5TR specifically utilizes the SOT23-5 footprint, providing a compact solution for space-constrained designs requiring reliable power management.

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

Other members of the TPL9032 family with different output voltages but the same SOT23-5 package may serve as functional substitutes if the voltage requirement changes. Cross-reference pinouts and thermal characteristics to ensure compatibility with existing board layouts and cooling solutions.