LD59030DTPU12R

Overview

The LD59030DTPU12R is a fixed-output linear regulator from STMicroelectronics providing a nominal 1.2 V output with a guaranteed maximum current of 300 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features an ultra-low dropout voltage of 330 mV typical at full load. The device maintains high accuracy with ±1% output tolerance at 25 °C and includes internal soft-start, thermal protection, and logic-controlled electronic shutdown. It is housed in a compact DFN4 1x1 package suitable for space-constrained designs.

Feature Summary

• Ultra-low dropout voltage capability ensures efficient power delivery under heavy loads
• Logic-controlled enable pin allows deep standby mode with minimal current consumption
• Integrated soft-start circuit limits inrush current during startup sequences
• Internal output discharge MOSFET rapidly removes charge when the device is disabled

Applications

• Low power battery-operated applications requiring extended runtime
• Space-constrained portable electronics utilizing compact surface-mount packaging
• Systems requiring precise voltage regulation with minimal noise sensitivity

Procurement Notes

Verify the specific ordering code suffix against the manufacturer's official documentation to confirm the presence of the auto-discharge feature. Ensure that the selected component matches the required output voltage tolerance and operating temperature specifications for the intended industrial environment before finalizing procurement orders.

Selection Notes

Select this regulator when designing circuits that demand high efficiency near the minimum input voltage threshold. The integrated soft-start function makes it suitable for systems sensitive to power supply transients. Verify that the external ceramic capacitor values meet the stability requirements defined in the datasheet to prevent oscillation during operation.

Part Context

This component belongs to the LD59030 series of very low dropout linear regulators manufactured by STMicroelectronics. The series offers various fixed output voltages ranging from 0.8 V to 5.0 V. All variants share the same DFN4 1x1 footprint and core electrical characteristics, differing primarily in their regulated output levels and optional discharge features.

Replacement Considerations

LD59030DTPU18R

FAQ

Does the LD59030DTPU12R include an automatic output discharge feature?

Yes, the DTPU variant includes an internal MOSFET that automatically discharges the output capacitor when the enable pin is driven low.

What is the minimum recommended output capacitance for stability?

A minimum output capacitance of 0.47 µF is recommended to ensure loop stability across all operating conditions.