LD6815TD/12P,125

Overview

The LD6815TD/12P,125 is a low dropout regulator (LDO) from the NXP LD6815 series, featuring a fixed nominal output voltage of 1.2 V and a maximum output current of 150 mA. It operates with an input voltage range of 2.3 V to 5.5 V and achieves a typical power supply rejection ratio (PSRR) of 75 dB at 1 kHz. The device incorporates an auto discharge function via a pull-down switching transistor in disabled mode, ensuring a low-ohmic output state. Key electrical parameters include a typical dropout voltage of 250 mV at full load, a quiescent current of 0.1 µA in shutdown mode, and an RMS output noise of 40 µV over a 10 Hz to 100 kHz bandwidth.

Feature Summary

• Integrated pull-down switching transistor provides an auto discharge function for rapid output voltage decay when disabled.
• High-level electrostatic discharge protection rated at 6 kV under Human Body Model conditions.
• Ultra-low quiescent current consumption in shutdown mode to minimize power loss during standby operations.

Applications

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

Procurement Notes

Verify that the specific part number suffix '125' corresponds to the standard tape and reel packing method described in the official datasheet. Confirm the package orientation matches the Q3 quadrant specification for SOT753 carriers. Ensure compliance with RoHS directives as indicated by the product profile. Cross-reference the marking code AD3 on the component body to validate the 1.2 V output voltage and pull-down configuration.

Selection Notes

Select this component when a stable 1.2 V rail is required for mobile applications with strict space constraints. The SOT753 package offers a compact footprint suitable for high-density PCB layouts. Choose this variant over the high-ohmic version if fast discharge of the output capacitor is necessary upon shutdown. Ensure the application input voltage remains within the 2.3 V to 5.5 V operating range for optimal performance.

Part Context

This device belongs to the LD6815 series of low dropout regulators manufactured by NXP Semiconductors. The series is characterized by high PSRR and low noise, designed specifically for portable electronics. The LD6815TD/xxP designation indicates the inclusion of the auto discharge feature, distinguishing it from the LD6815TD/xxH series which maintains a high-impedance state when disabled.

Replacement Considerations

LD6815TD/12P