LD6815TD/15P,125

Overview

The NXP LD6815TD/15P,125 is a low-dropout regulator (LDO) with a fixed nominal output voltage of 1.5 V and a maximum output current of 150 mA. It operates within an input voltage range of 2.3 V to 5.5 V. The device features a typical dropout voltage of 250 mV at full load and achieves a power supply rejection ratio (PSRR) of 75 dB at 1 kHz. RMS output noise is specified at 40 µV in the 10 Hz to 100 Hz bandwidth. The part utilizes an SOT753 (TSOP5) package and includes an auto discharge function via a pull-down transistor for low-ohmic output states when disabled.

Feature Summary

• Integrates an auto discharge function using a pull-down switching transistor to provide a low-ohmic output state during shutdown
• Provides high-level electrostatic discharge protection rated at 6 kV under the Human Body Model standard
• Maintains ultra-high power supply rejection ratio to suppress input voltage ripples and noise effectively
• Features overcurrent protection mechanisms to safeguard against short circuits and excessive loads

Applications

• Smartphones
• Tablet PCs
• Mobile handsets
• Portable media players

Procurement Notes

Verify the specific suffix '125' against official documentation to confirm tape-and-reel packaging orientation and lot codes. Ensure the pull-down variant matches system requirements for discharge speed. Confirm RoHS compliance status and check for any recent revisions that may affect marking codes or thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when a fixed 1.5 V rail is required with minimal quiescent current consumption. The LD6815TD/15P is suitable for designs needing fast output discharge upon enable signal removal. Consider the SOT753 package constraints for PCB layout and thermal dissipation. Verify that the external capacitor ESR remains within the specified limits to ensure stability across the operating temperature range.

Part Context

This device belongs to the LD6815 series of small-size low-dropout regulators manufactured by NXP Semiconductors. The series offers various fixed output voltages ranging from 1.2 V to 3.6 V. The 'P' suffix indicates the inclusion of the auto discharge feature, distinguishing it from the 'H' variant which provides a high-ohmic state. All devices share the same monolithic silicon technology and TSOP5 plastic package form factor.

Replacement Considerations

LD6815TD/15H,125