Texas Instruments TPS7A2018PDQNRM3

Overview

TPS7A2018PDQNRM3 from Texas Instruments is a 300mA ultra-low-noise, low-I_Q, high-PSRR LDO regulator in a 1mm × 1mm X2SON-4 package, delivering 1.8V output with ±1.5% tolerance, 7μV_RMS noise (no bypass cap required), and 140mV max dropout at 300mA - optimized for RF and precision analog power rails in space-constrained portable systems.

For engineers reviewing the TPS7A2018PDQNRM3 datasheet, TPS7A2018PDQNRM3 pinout, TPS7A2018PDQNRM3 application, or TPS7A2018PDQNRM3 equivalent, key selection criteria include ultra-low noise performance without external filtering, smart enable pulldown functionality, stability with ≥1µF ceramic output capacitance, and thermal performance in the DQN package under 125°C junction conditions.

Technical Context

The TPS7A2018PDQNRM3 employs a precision bandgap reference and low-noise error amplifier architecture to achieve 7μV_RMS integrated output noise over 10Hz–100kHz, eliminating need for noise-bypass capacitors. Its high PSRR of 95dB at 1kHz supports clean power delivery to sensitive RF receivers and ADCs.

It integrates a smart enable circuit with a 500kΩ internal pulldown resistor that holds EN low by default and disconnects during operation to minimize leakage. Dropout voltage is specified at 140mV (max) for V_OUT = 3.3V and scales per output voltage - e.g., 200mV (max) for 1.5V ≤ V_OUT < 2.5V - enabling efficient operation across its 0.8V–5.5V output range.

Key Specifications

Pinout & Package

TPS7A2018PDQNRM3 uses the 1mm × 1mm X2SON-4 (DQN) package with wettable flank leads and an exposed thermal pad. The thermal pad must be connected to GND 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 LDO regulator applications.

Compared with TPS7A2018PDQNRM3, the TPS7A2018PDBVR offers higher thermal robustness in larger packages but sacrifices miniaturization, while the MCP1700T-1802E/MB trades noise, PSRR, and enable intelligence for lower cost and simpler integration in low-power legacy designs.

Availability

TPS7A2018PDQNRM3 is available at Aetrix Electronics and suitable for portable medical sensors, smartphone RF subsystems, and industrial field transmitters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS7A2018PDQNRM3 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 decades of expertise in precision power management ICs.

The TPS7A20 family is designed for ultra-low-noise, low-I_Q power delivery in battery-operated and RF-sensitive applications - targeting space-constrained portable electronics where noise, efficiency, and reliability are critical.

FAQ

What is the maximum output current capability of the TPS7A2018PDQNRM3?

The TPS7A2018PDQNRM3 delivers up to 300mA of continuous output current. This rating is validated across the full operating temperature range (–40°C to +125°C) and accounts for thermal limitations of the 1mm × 1mm X2SON package. Derating applies above 85°C ambient depending on PCB copper area and airflow.

Does the TPS7A2018PDQNRM3 require an external noise-bypass capacitor?

No, the TPS7A2018PDQNRM3 does not require an external noise-bypass capacitor. Its internal architecture achieves 7μV_RMS output noise (10Hz–100kHz) without additional filtering - a key differentiator confirmed in TI's SBVS338H datasheet Section 1 and Figure 5-62.

What is the dropout voltage specification for the TPS7A2018PDQNRM3 at 300mA load?

At 300mA load and V_OUT = 1.8V, the TPS7A2018PDQNRM3 has a maximum dropout voltage of 200mV (per Section 5.5, V_DO table). For V_OUT = 3.3V, the max dropout is 140mV - both values apply specifically to the DQN package variant.

How does the smart enable function work on the TPS7A2018PDQNRM3?

The TPS7A2018PDQNRM3 features a smart enable input with an internal 500kΩ pulldown resistor. When EN is left floating, this resistor pulls it below V_EN(LOW) (0.3V), ensuring default disable. Once driven above V_EN(HI) (0.9V), the pulldown disconnects to reduce leakage - eliminating external components.

Is the TPS7A2018PDQNRM3 stable with a 1µF ceramic output capacitor?

Yes, the TPS7A2018PDQNRM3 is explicitly characterized and guaranteed stable with a minimum 1µF ceramic output capacitor (X5R/X7R), as stated in Section 5.3 Recommended Operating Conditions and Section 6.3 Feature Description. Larger values up to 200µF are also supported.