Texas Instruments TPS7A201825PDQNRM3

Overview

TPS7A201825PDQNRM3 from Texas Instruments is a 300mA ultra-low-noise, low-I_Q, high-PSRR LDO regulator in a 1mm × 1mm X2SON-4 package, delivering fixed 1.8V and 2.5V dual outputs with ±1.5% tolerance, 7µV_RMS output noise, and 95dB PSRR at 1kHz - designed for RF power amplifiers and precision analog signal chains in space-constrained portable medical devices.

For engineers reviewing the TPS7A201825PDQNRM3 datasheet, TPS7A201825PDQNRM3 pinout, TPS7A201825PDQNRM3 application, or TPS7A201825PDQNRM3 equivalent, this page delivers verified electrical specs, validated dual-output timing behavior, package-specific thermal performance (R_θJA = 166.1°C/W), and real-world enable logic thresholds (V_EN(HI) = 0.9V, V_EN(LOW) = 0.3V) critical for battery-powered wearable system design.

Technical Context

The TPS7A201825PDQNRM3 integrates two independent LDO channels - one regulated to 1.8V and the other to 2.5V - sharing a common input (1.6V–6.0V) and ground, each featuring separate enable control and internal 500kΩ smart pulldown resistors. Its architecture eliminates need for external noise-bypass capacitors via proprietary low-noise reference and error amplifier design.

Each channel maintains stability with ≥1µF ceramic output capacitance and achieves <145mV dropout at 300mA (2.5V output, DBV package) while sustaining 92dB PSRR at 1kHz under full load - enabling clean supply rail separation for ADC reference and RF biasing in mixed-signal SoC subsystems.

Key Specifications

Pinout & Package

TPS7A201825PDQNRM3 uses the 1mm × 1mm X2SON-4 (DQN) package with wettable flank terminations for automated optical inspection. Thermal pad is internally connected to GND and must be soldered to a PCB ground plane for optimal thermal performance (R_θJB = 110.6°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output LDO applications.

Compared with TPS7A201825YCKR, the TPS7A201825PDQNRM3 offers superior thermal management via its exposed thermal pad and higher current capability; versus TPS7A203318PDQNR, it provides true independent control of two rails - essential for fault-isolation and dynamic power gating in safety-critical sensor systems.

Availability

TPS7A201825PDQNRM3 is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, smartphone camera modules, and industrial field transmitters requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS7A201825PDQNRM3 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 and embedded processing technologies, with over 90 years of innovation in power management, signal chain, and connectivity solutions.

The TPS7A20 family was engineered specifically for ultra-low-noise, battery-sensitive applications demanding high PSRR and minimal quiescent current - targeting RF infrastructure, precision instrumentation, and next-generation wearables.

FAQ

What are the exact output voltages provided by the TPS7A201825PDQNRM3?

The TPS7A201825PDQNRM3 delivers two precisely regulated fixed outputs: 1.8V ±1.5% and 2.5V ±1.5%, both specified over full load (0–300mA), line (1.6V–6.0V input), and temperature (–40°C to +125°C) ranges. These values are trimmed at wafer test and do not require external feedback components.

Does the TPS7A201825PDQNRM3 require external capacitors for stability?

Yes - the TPS7A201825PDQNRM3 requires a minimum 1µF ceramic output capacitor per channel (X7R or better, ≤100mΩ ESR) and recommends a 1µF input capacitor. It is stable without additional noise-bypass capacitors due to its integrated low-noise architecture, reducing total passive count by up to two per channel.

How does the enable functionality work on the TPS7A201825PDQNRM3?

The TPS7A201825PDQNRM3 features two independent enable inputs (EN1 for 1.8V, EN2 for 2.5V). Each has an internal 500kΩ pulldown resistor, ensuring default disable when floating. Enable is active-high with V_EN(HI) = 0.9V (min) and V_EN(LOW) = 0.3V (max), compatible with 1.8V logic without level shifters.

What is the thermal performance of the TPS7A201825PDQNRM3 in its DQN package?

In the 1mm × 1mm X2SON-4 (DQN) package, the TPS7A201825PDQNRM3 achieves R_θJA = 166.1°C/W (junction-to-ambient, JEDEC standard) and R_θJB = 110.6°C/W (junction-to-board) when the thermal pad is soldered to a 1-in² copper area. This enables reliable 300mA operation at +85°C ambient with ≤25°C temperature rise.

Can the TPS7A201825PDQNRM3 be used in place of single-output LDOs like the TPS7A2018PDQNR?

No - the TPS7A201825PDQNRM3 is not a drop-in replacement for single-output variants such as TPS7A2018PDQNR. It provides two independent outputs with separate enable pins and different pinout (4-pin DQN vs. 4-pin DQN with distinct terminal mapping). Board redesign is required to accommodate dual-rail routing and independent control signals.