NXP Semiconductors LD6806TD/25H,125

Overview

LD6806TD/25H from NXP Semiconductors is a 2.5 V, 200 mA ultra-low-dropout linear regulator in SOT753 (TSOP5) package with 60 mV dropout at full load, 30 µV RMS output noise, and active-high enable control. It delivers stable low-noise power for voltage-sensitive analog and digital interfaces in space-constrained mobile devices.

For engineers reviewing the LD6806TD/25H datasheet, LD6806TD/25H pinout, LD6806TD/25H application, or LD6806TD/25H equivalent, key selection criteria include its high-ohmic (3-state) output during disable, thermal shutdown at 160 °C, ±0.5 % output voltage accuracy at +25 °C, and compatibility with 1 µF X7R ceramic output capacitors.

Technical Context

The LD6806TD/25H implements a PMOS pass transistor architecture enabling 60 mV dropout at 200 mA, supporting operation down to VIN = VO(nom) + 0.06 V. Its internal bandgap reference and error amplifier maintain regulation across −40 °C to +85 °C ambient temperature.

It integrates thermal protection (160 °C shutdown with 20 K hysteresis), overcurrent limiting, and 10 kV HBM ESD protection. The active-high EN pin accepts 1.4 V to 5.5 V logic, with 0.4 V max LOW threshold ensuring robust noise immunity in noisy mobile environments.

Key Specifications

Pinout & Package

SOT753 (TSOP5) plastic surface-mounted package: 3.0 mm × 2.5 mm × 1.1 mm body, gull-wing leads, RoHS-compliant, halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS7A0525PDBVR and MCP1700T-2502E/TT, LD6806TD/25H provides superior dropout performance (60 mV vs. ≥170 mV), true 3-state disable, and tighter thermal protection-making it optimal for battery-constrained, noise-sensitive, and enable-controlled designs.

Availability

LD6806TD/25H is available at Aetrix Electronics and suitable for mobile phone handsets, wireless headsets, and wearable sensor hubs requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LD6806TD/25H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.

The LD6806 series was designed specifically for miniaturized portable electronics, emphasizing ultra-low dropout, low noise, and high integration in sub-1 mm² packages to meet stringent size and power constraints in mobile appliances.

FAQ

What is the minimum input voltage required for stable operation of LD6806TD/25H?

The LD6806TD/25H requires a minimum input voltage of VO(nom) + V_do = 2.5 V + 60 mV = 2.56 V at 200 mA load to maintain regulation. At lighter loads, dropout decreases - e.g., ~30 mV at 100 mA - allowing operation down to ~2.53 V. Input must remain within 2.3 V to 5.5 V absolute ratings.

Does LD6806TD/25H require an external output capacitor, and what type is recommended?

Yes, LD6806TD/25H requires a minimum 1.0 µF X7R ceramic capacitor at the OUT pin for stability, with ESR between 5 mΩ and 500 mΩ. The datasheet specifies X7R dielectric for full −40 °C to +125 °C operation; NP0/C0G is acceptable but less common for this capacitance value.

What happens to the output when the EN pin is pulled LOW on LD6806TD/25H?

When EN is pulled LOW (<0.4 V), LD6806TD/25H enters shutdown mode and places the OUT pin in a high-impedance (3-state) condition - effectively disconnecting the output from the internal regulator. This prevents back-powering of downstream circuitry and reduces system-level leakage current.

How does the thermal protection of LD6806TD/25H behave during overload conditions?

LD6806TD/25H shuts down at 160 °C junction temperature and remains off until the junction cools by 20 K (to ≤140 °C), at which point it automatically resumes regulation. This hysteresis prevents thermal oscillation during sustained overload or inadequate PCB copper area.

Is LD6806TD/25H compatible with lead-free reflow soldering processes?

Yes, LD6806TD/25H is Pb-free and RoHS-compliant. Its SOT753 package is qualified for standard lead-free reflow profiles per J-STD-020, with peak temperatures up to 260 °C. No special pre-bake or moisture sensitivity handling is required beyond standard MSL1 classification.