Texas Instruments TPS7A20L10PDQNR

Overview

TPS7A20L10PDQNR from Texas Instruments is a 300mA, low-noise, ultra-low-I_Q LDO voltage regulator with 1.0V fixed output, 7μV_RMS noise, 95dB PSRR at 1kHz, and 140mV max dropout at 300mA (V_OUT = 3.3V). It operates from 1.6V to 6.0V input and features 1.2V logic-compatible enable, stable with 1µF ceramic output capacitor, and targets RF/analog power rails in space-constrained portable systems.

For engineers reviewing the TPS7A20L10PDQNR datasheet, TPS7A20L10PDQNR pinout, TPS7A20L10PDQNR application, or TPS7A20L10PDQNR equivalent, key selection criteria include its ±1.5% output tolerance over load/line/temperature, smart enable pulldown (500kΩ), 6.5μA quiescent current, and X2SON-4 (1mm × 1mm) package for high-density PCB layouts.

Technical Context

The TPS7A20L10PDQNR implements an internal precision reference and low-noise pass element enabling 7μV_RMS output noise without bypass capacitor. Its high PSRR (95dB @ 1kHz, 65dB @ 1MHz under 300mA load) suppresses switching noise from upstream DC/DC converters feeding sensitive analog/RF circuits.

It integrates soft-start to limit inrush current, automatic output discharge via 150Ω pulldown during shutdown, and UVLO (1.17–1.59V) with 50mV hysteresis. The enable threshold (V_EN(HI) = 0.75V, V_EN(LOW) = 0.43V) ensures compatibility with 1.2V logic families while the internal 500kΩ pulldown holds EN inactive when floating.

Key Specifications

Pinout & Package

TPS7A20L10PDQNR uses the DQN package: 4-pin X2SON with 1mm × 1mm footprint and exposed thermal pad (Pin 5). The package supports high thermal efficiency when the thermal pad is connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A20L10PDQNR, the TPS7A2010PDQNR is functionally identical and interchangeable, while the MCP1804T-1002E/MB offers lower cost but sacrifices 150mA output capacity, 5.5μA quiescent current advantage, and 0.7mm² board area reduction.

Availability

TPS7A20L10PDQNR is available at Aetrix Electronics and suitable for smartphones and tablets, portable medical equipment, IP network cameras, and wearables requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS7A20L10PDQNR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in power management ICs.

The TPS7A20L series was designed specifically for ultra-low-noise, low-I_Q power delivery in space-constrained, battery-operated RF and precision analog systems - emphasizing miniaturization, efficiency, and signal integrity.

FAQ

What is the maximum input voltage rating for the TPS7A20L10PDQNR?

The TPS7A20L10PDQNR has an absolute maximum input voltage rating of 6.5V. However, the recommended operating range is 1.6V to 6.0V. Exceeding 6.5V risks permanent damage, and operation above 6.0V voids guaranteed specifications per the datasheet's Recommended Operating Conditions table.

Does the TPS7A20L10PDQNR require an external noise-bypass capacitor?

No, the TPS7A20L10PDQNR does not require an external noise-bypass capacitor. Its 7μV_RMS output noise is achieved through internal design techniques, and the datasheet explicitly states "No noise-bypass capacitor required" as a key feature. Stability is maintained with only a 1µF ceramic output capacitor.

What is the purpose of the thermal pad on the TPS7A20L10PDQNR package?

The thermal pad (Pin 5) on the TPS7A20L10PDQNR's X2SON package provides a low-thermal-resistance path from the die to the PCB. When soldered to a GND plane, it reduces junction-to-board thermal resistance (θ_JB) from 110.6°C/W to ~50°C/W, enabling reliable 300mA operation at ambient temperatures up to 85°C without derating.

How does the smart enable pulldown function in the TPS7A20L10PDQNR?

The TPS7A20L10PDQNR features an internal 500kΩ pulldown resistor on the EN pin that actively holds the regulator disabled when EN is left floating. This eliminates the need for an external pull-down resistor and ensures predictable power-up behavior in systems where EN may be unconnected during initialization.

What is the output voltage tolerance specification for the TPS7A20L10PDQNR across temperature and load?

The TPS7A20L10PDQNR guarantees ±1.5% output voltage tolerance over full operating conditions (–40°C to +125°C junction temperature, 1mA to 300mA load, 1.6V to 6.0V input). This is specified in the Electrical Characteristics table under ΔV_OUT for V_OUT ≥ 1.85V; tighter tolerance applies to the 1.0V output variant.