Texas Instruments TPS7A0525PDQNR

Overview

TPS7A0525PDQNR from Texas Instruments is a 2.5-V fixed-output, ultralow-quiescent-current LDO regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering up to 200 mA with 1% typical output accuracy, 235 mV max dropout at full load, and 1 µA typical ground current - designed for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0525PDQNR datasheet, TPS7A0525PDQNR pinout, TPS7A0525PDQNR application, or TPS7A0525PDQNR equivalent, key selection criteria include ultralow IQ (1 µA typ), active output discharge, stability with ≥0.47-µF ceramic output capacitor, operation down to 1.4 V input, and thermal shutdown at 160°C.

Technical Context

The TPS7A0525PDQNR uses a PMOS pass transistor architecture enabling near-zero dropout behavior at light loads and foldback current limiting for short-circuit protection. Its enable pin (EN) supports logic-level control with 0.9 V VIH and 0.4 V VIL thresholds, and internal UVLO ensures operation only above 1.21 V input.

It integrates an active pulldown circuit for rapid output discharge during disable, and achieves excellent transient response due to low output impedance and compatibility with small ceramic capacitors. The device is fully specified across –40°C to +125°C junction temperature.

Key Specifications

Pinout & Package

TPS7A0525PDQNR is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flanks, optimized for automated optical inspection and high-density layouts.

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, the TPS7A0525PDQNR offers the smallest footprint, lowest thermal resistance, and unique active discharge - making it optimal for miniaturized, thermally constrained, and tightly sequenced battery-powered designs.

Availability

TPS7A0525PDQNR is available at Aetrix Electronics and suitable for wearable electronics, always-on power supplies, and portable medical diagnostics requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS7A0525PDQNR 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in power management ICs for industrial, automotive, and portable markets.

The TPS7A05 family is engineered for ultralow-power, space-constrained applications - delivering high efficiency and precision regulation where battery longevity and miniaturization are critical design drivers.

FAQ

What is the minimum input voltage required for TPS7A0525PDQNR to regulate 2.5 V output?

The TPS7A0525PDQNR requires a minimum input voltage of 1.4 V to operate, but to maintain regulation at 2.5 V output, VIN must exceed VOUT by at least the dropout voltage. At 200 mA load, max dropout is 235 mV, so VIN ≥ 2.735 V is required for full-load regulation. At lighter loads, dropout drops significantly - e.g., <50 mV at 10 mA - enabling operation from partially discharged batteries.

Does TPS7A0525PDQNR require an external pull-up resistor on the EN pin?

No, the TPS7A0525PDQNR does not require an external pull-up on EN. When enable functionality is not needed, the EN pin must be connected directly to IN. The device draws only 10 nA at EN when VIN = 5.5 V, and its logic thresholds (VIH = 0.9 V, VIL = 0.4 V) ensure reliable operation with standard GPIOs without additional biasing components.

Can TPS7A0525PDQNR be used with a 0.22-µF output capacitor?

No - the TPS7A0525PDQNR is specified and tested for stability with ≥0.47 µF ceramic output capacitance. Using 0.22 µF violates the minimum requirement and may cause oscillation or degraded transient response. TI recommends 1 µF X7R ceramic as nominal; values up to 22 µF are acceptable and improve PSRR at low frequencies.

What is the purpose of the exposed thermal pad on the TPS7A0525PDQNR X2SON package?

The exposed thermal pad on the TPS7A0525PDQNR (DQN package) is electrically isolated but thermally connected to the die substrate. It must be soldered to a large-area PCB ground plane to achieve the rated R_θJB = 83.5°C/W and prevent thermal shutdown under sustained 200-mA load. Leaving it unconnected degrades thermal performance by >60°C/W and risks reliability failure.

How does the active output discharge function work in TPS7A0525PDQNR?

When EN is pulled low (<0.4 V), the TPS7A0525PDQNR activates an internal ~120-Ω pulldown switch between OUT and GND (specified for P-version variants). This discharges the output capacitor rapidly - typically within tens of microseconds - ensuring downstream circuitry resets cleanly and preventing back-powering of upstream sources or unintended logic states during power-down sequences.