Texas Instruments TPS7A2033PDQNRM3

Overview

TPS7A2033PDQNRM3 from Texas Instruments is a 3.3V, 300mA ultra-low-noise LDO regulator in a 1mm × 1mm X2SON-4 package, featuring 7μVRMS output noise, 95dB PSRR at 1kHz, and 6.5μA quiescent current - designed for RF power rails and precision analog circuits in space-constrained portable medical devices and IP cameras.

For engineers reviewing the TPS7A2033PDQNRM3 datasheet, TPS7A2033PDQNRM3 pinout, TPS7A2033PDQNRM3 application, or TPS7A2033PDQNRM3 equivalent, key selection criteria include dropout voltage at full load (140mV max at 300mA), ±1.5% output tolerance over temperature/load, stability with 1µF ceramic output capacitor, and smart enable pulldown functionality eliminating external pull-down resistors.

Technical Context

The TPS7A2033PDQNRM3 employs a precision bandgap reference and low-noise error amplifier architecture to achieve 7μVRMS integrated noise without requiring a bypass capacitor. Its high PSRR (95dB @ 1kHz) is maintained across wide input/output voltage ranges and load conditions up to 300mA.

It integrates an internal soft-start circuit limiting inrush current and features a smart enable input with a 500kΩ internal pulldown resistor - ensuring default disable state when EN floats and disconnecting the pulldown during operation to minimize leakage. The device enters thermal shutdown at 165°C and includes UVLO with 50mV hysteresis.

Key Specifications

Pinout & Package

TPS7A2033PDQNRM3 uses the X2SON-4 (DQN) package: 1mm × 1mm, 0.4mm pitch, 4-pin surface-mount with exposed thermal pad (pin 5). 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 TPS7A2033PDBVR and MCP1703T-3302E/MB, the TPS7A2033PDQNRM3 delivers superior noise/PSRR performance in the smallest footprint, enabling miniaturized RF and medical designs - but requires precise reflow and thermal pad grounding for full specification compliance.

Availability

TPS7A2033PDQNRM3 is available at Aetrix Electronics and suitable for RF transceiver modules, portable medical sensors, and IP network camera designs requiring stable component supply, long-term manufacturability, and guaranteed TI original sourcing.

Supply support for TPS7A2033PDQNRM3 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 LDO design expertise for high-reliability applications.

The TPS7A20 family was engineered specifically for ultra-low-noise, low-I_Q power delivery in battery-operated RF and precision analog systems - prioritizing noise floor, PSRR, and solution size over legacy feature sets.

FAQ

What is the maximum output current and dropout voltage specification for TPS7A2033PDQNRM3?

The TPS7A2033PDQNRM3 delivers up to 300mA continuous output current. Its dropout voltage is specified at 140mV maximum when delivering 300mA at 3.3V output - meaning it maintains regulation with input as low as 3.44V. This value is validated for the DQN package per TI's SBVS338H datasheet Section 5.5, and applies across –40°C to +125°C junction temperature.

Does TPS7A2033PDQNRM3 require an external noise-bypass capacitor?

No, the TPS7A2033PDQNRM3 does not require an external noise-bypass capacitor. Its internal architecture achieves 7μVRMS output noise (10Hz–100kHz) without one - a key differentiator confirmed in Section 1 (Features) and Section 5.5 (Electrical Characteristics) of the TI datasheet. This simplifies layout and reduces BOM count in noise-sensitive applications like RF receivers and precision ADCs.

How does the smart enable function work on TPS7A2033PDQNRM3?

The TPS7A2033PDQNRM3 features a smart enable input (EN) with an internal 500kΩ pulldown resistor. When EN is left floating, this resistor pulls it low to disable the LDO by default - eliminating the need for an external pull-down. Once EN rises above 0.9V (VEN(HI)), the internal pulldown disconnects to reduce leakage current, as documented in Section 4 (Pin Functions) and Section 5.5 of the datasheet.

What output capacitor value is required for stability with TPS7A2033PDQNRM3?

The TPS7A2033PDQNRM3 is stable with a minimum 1µF ceramic output capacitor - significantly smaller than many legacy LDOs requiring ≥10µF. This is explicitly stated in Section 1 (Features) and Section 5.3 (Recommended Operating Conditions). TI validates stability across 1µF to 200µF, enabling compact, low-cost filtering for high-frequency noise suppression.

Is thermal pad connection mandatory for TPS7A2033PDQNRM3 in the DQN package?

Yes, the thermal pad (Pin 5) of the TPS7A2033PDQNRM3 in the X2SON-4 (DQN) package must be connected to GND for reliable operation. Per Section 5.4 (Thermal Information), doing so achieves R_θJB = 110.6°C/W - critical for dissipating power under 300mA load at elevated ambient temperatures. Leaving it unconnected degrades thermal performance and risks thermal shutdown under sustained load.