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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Texas Instruments TPS7A2040PDQNR

Name: TPS7A2040PDQNR
Brand: Texas Instruments
SKU: TPS7A2040PDQNR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS7A2040PDQNR

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-XDFN Exposed Pad

Datasheet:: TPS7A2040PDQNR.pdf

Description:: 300-MA, ULTRA-LOW-NOISE, LOW-IQ,

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TPS7A2040PDQNR from Texas Instruments is a 300mA ultra-low-noise, low-I_Q, high-PSRR LDO regulator in a 4-pin X2SON (DQN) package, delivering 4.0V output with ±1.5% tolerance, 7μV_RMS output noise, and 95dB PSRR at 1kHz. It operates from 1.6V to 6.0V input and supports RF and precision analog circuits in space-constrained battery-powered systems.

For engineers reviewing the TPS7A2040PDQNR datasheet, TPS7A2040PDQNR pinout, TPS7A2040PDQNR application, or TPS7A2040PDQNR equivalent, key selection criteria include dropout voltage at 300mA (140mV max), smart enable pulldown (500kΩ internal), stability with 1µF ceramic output capacitor, and thermal performance in the 1mm × 1mm X2SON package.

Technical Context

The TPS7A2040PDQNR uses a precision bandgap reference and adaptive biasing to achieve ±1.5% output accuracy across load, line, and temperature (–40°C to +125°C). Its internal soft-start limits inrush current, while the smart enable circuit integrates a 500kΩ pulldown resistor to ensure default disable state without external components.

Designed for noise-sensitive signal chains, it delivers 7μV_RMS integrated noise (10Hz–100kHz) without requiring a noise-bypass capacitor, and maintains 92dB PSRR at 1kHz under 300mA load-critical for powering ADCs, RF transceivers, and PLLs.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 4.0V with ±1.5% max tolerance over load, line, and temperature - ensures stable supply for 3.3V/4.0V logic and analog rails.
Max Output Current	300mA continuous - sufficient for powering microcontrollers, sensors, and RF front-ends in portable devices.
Output Noise	7μV_RMS (10Hz–100kHz) - eliminates need for external noise-bypass capacitor, reducing BOM count and PCB area.
PSRR	95dB at 1kHz, 92dB at 1kHz @ 300mA - suppresses switching noise from upstream DC/DC converters feeding sensitive analog stages.
Quiescent Current	6.5μA typical - enables multi-year battery life in always-on IoT sensors and wearables.
Dropout Voltage	140mV max at 300mA (V_OUT = 3.3V), 145mV max at 300mA (V_OUT = 3.3V, DBV) - supports operation down to 4.14V input for 4.0V output, maximizing battery utilization.
Input Voltage Range	1.6V to 6.0V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO₄, and 3.3V/5V system rails.
Stability	Stable with ≥1µF ceramic output capacitor - enables use of small, low-ESR MLCCs; no tantalum or electrolytic required.

Pinout & Package

The TPS7A2040PDQNR is housed in a 1mm × 1mm, 4-pin X2SON (DQN) package with wettable flanks. The thermal pad (Pin 5) must be connected to GND for optimal thermal performance (R_θJB = 110.6°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Regulated output	Delivers fixed 4.0V; requires ≥1µF ceramic capacitor placed adjacent to pin for stability and transient response.
2 (GND)	Power ground	Common return path; connects to thermal pad (Pin 5) for enhanced heat dissipation and EMI control.
3 (EN)	Enable input	Active-high logic; 0.9V min V_EN(HI), 0.3V max V_EN(LOW); internal 500kΩ pulldown holds device off when floating.
4 (IN)	Input supply	Accepts 1.6V–6.0V; benefits from local 1µF ceramic capacitor to suppress source impedance effects.
5 (Thermal Pad)	Thermal & electrical connection	Must be soldered to GND plane; not electrically isolated - improves θ_JA by ~30°C/W vs. floating pad.

Key Features

Feature	Design Value
Ultra-low noise regulation	7μV_RMS output noise enables direct powering of RF receivers, high-resolution ADCs, and low-phase-noise synthesizers without added filtering.
Smart enable with pulldown	Integrated 500kΩ EN pulldown eliminates external resistor, preventing unintended startup during board handling or unpowered states.
Low dropout at full load	140mV max dropout at 300mA allows >96% efficiency at 4.0V output from 4.14V input - critical for extending Li-ion battery runtime.
Micro-power quiescent operation	6.5μA I_Q enables always-on monitoring in battery-backed security sensors and real-time clock supervisors.
Small-footprint packaging	1mm × 1mm X2SON footprint saves >75% board area vs. SOT-23-5 - ideal for compact wearables and camera modules.
Automatic output discharge	150Ω internal pulldown on OUT during shutdown prevents floating rail and ensures predictable power sequencing in multi-rail systems.

Applications

Portable Medical Sensors	IP Network Cameras
Use Scenario: Powering low-noise analog front-ends in wearable ECG/PPG monitors with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 4.0V LDO supplying ADC reference and op-amp bias rails. Use Value: 7μV_RMS noise ensures <1 LSB error in 16-bit medical ADCs; 6.5μA I_Q extends battery life beyond 12 months.	Use Scenario: Regulating clean 4.0V supply for CMOS image sensor and ISP in compact surveillance cameras. IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switcher ripple before analog imaging chain. Use Value: 92dB PSRR at 1kHz suppresses 2MHz DC/DC switching noise, eliminating image banding artifacts.
Smart Meters	Motor Drive Control Boards
Use Scenario: Providing stable 4.0V rail for metrology ADC and isolation interface in ANSI C12.20-compliant meters. IC Role / Device Role / Timing Role: Precision voltage reference source for energy measurement subsystem. Use Value: ±1.5% output tolerance over –40°C to +85°C ensures Class 0.2 accuracy compliance without calibration drift.	Use Scenario: Powering gate drivers and position encoder interfaces in BLDC motor controllers with 24V bus. IC Role / Device Role / Timing Role: Local LDO for isolated feedback and protection logic ICs. Use Value: 140mV dropout enables reliable 4.0V output from 4.14V intermediate rail, even under cold-start conditions.

Portable Medical Sensors

IP Network Cameras

Use Scenario: Powering low-noise analog front-ends in wearable ECG/PPG monitors with single-cell Li-ion batteries.

IC Role / Device Role / Timing Role: Primary 4.0V LDO supplying ADC reference and op-amp bias rails.

Use Value: 7μV_RMS noise ensures <1 LSB error in 16-bit medical ADCs; 6.5μA I_Q extends battery life beyond 12 months.

Use Scenario: Regulating clean 4.0V supply for CMOS image sensor and ISP in compact surveillance cameras.

IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switcher ripple before analog imaging chain.

Use Value: 92dB PSRR at 1kHz suppresses 2MHz DC/DC switching noise, eliminating image banding artifacts.

Smart Meters

Motor Drive Control Boards

Use Scenario: Providing stable 4.0V rail for metrology ADC and isolation interface in ANSI C12.20-compliant meters.

IC Role / Device Role / Timing Role: Precision voltage reference source for energy measurement subsystem.

Use Value: ±1.5% output tolerance over –40°C to +85°C ensures Class 0.2 accuracy compliance without calibration drift.

Use Scenario: Powering gate drivers and position encoder interfaces in BLDC motor controllers with 24V bus.

IC Role / Device Role / Timing Role: Local LDO for isolated feedback and protection logic ICs.

Use Value: 140mV dropout enables reliable 4.0V output from 4.14V intermediate rail, even under cold-start conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPL7407LPGQDR	7-channel 500mA N-channel array with 1.8–6V input; no fixed 4.0V option; higher I_Q (25μA)	Targeted at LED/relay driving, not precision analog regulation	Select only if discrete FET switching-not low-noise regulation-is required.
TPS7A0540PDBVR	200mA, 4.0V fixed, 1.6–6V input, but 25μV_RMS noise and 60dB PSRR @ 1kHz - significantly noisier and lower rejection	Suitable for digital I/O rails, not RF or high-precision analog	Choose only when cost sensitivity outweighs noise/PSRR requirements and load current ≤200mA.

Compared with TPL7407LPGQDR and TPS7A0540PDBVR, the TPS7A2040PDQNR uniquely combines 4.0V fixed output, 300mA capability, 7μV_RMS noise, and 95dB PSRR - making it the sole option among the three for powering noise-critical RF and metrology circuits in miniaturized designs.

Availability

TPS7A2040PDQNR is available at Aetrix Electronics and suitable for portable medical sensors, IP network cameras, smart meters, and motor drive control boards requiring stable component supply, long-term manufacturability, and guaranteed traceability.

Supply support for TPS7A2040PDQNR 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 heritage and automotive-grade reliability validation.

The TPS7A20 family was engineered specifically for ultra-low-noise, battery-efficient power delivery in space-constrained, high-performance analog and RF systems - emphasizing PSRR, noise, and quiescent current over raw current capacity.

FAQ

What is the maximum output current capability of the TPS7A2040PDQNR?

The TPS7A2040PDQNR delivers up to 300mA of continuous output current under recommended operating conditions (T_J ≤ 125°C, V_IN ≥ V_OUT + 0.3V). Current limit is internally set to 360–770mA depending on output voltage and package; however, sustained operation above 300mA may exceed thermal limits in the 1mm × 1mm X2SON package without adequate PCB copper area.

Does the TPS7A2040PDQNR require an external noise-bypass capacitor?

No, the TPS7A2040PDQNR does not require an external noise-bypass capacitor. Its proprietary internal architecture achieves 7μV_RMS output noise (10Hz–100kHz) without one - a key differentiator confirmed in the datasheet's Features section and Electrical Characteristics table.

What is the purpose of the thermal pad (Pin 5) on the TPS7A2040PDQNR DQN package?

The thermal pad (Pin 5) on the TPS7A2040PDQNR must be soldered to a GND-connected copper plane to achieve specified thermal performance (R_θJB = 110.6°C/W). Leaving it unconnected degrades junction-to-board resistance by >40°C/W, risking thermal shutdown under 300mA load at ambient >60°C.

How does the smart enable function behave when the EN pin is left unconnected?

When the EN pin of the TPS7A2040PDQNR is left floating, its internal 500kΩ pulldown resistor pulls the node below V_EN(LOW) (max 0.3V), ensuring the regulator remains disabled by default - eliminating risk of unintended power-up and simplifying system-level power sequencing.

Can the TPS7A2040PDQNR operate with a 1µF ceramic output capacitor?

Yes, the TPS7A2040PDQNR is explicitly characterized and guaranteed stable with a minimum 1µF ceramic output capacitor (X5R/X7R, ≤100mΩ ESR), as stated in Section 1 (Features) and Section 5.3 (Recommended Operating Conditions) of the datasheet - no additional compensation or larger capacitance is required.

TPS7A2040PDQNR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 4-XDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 4V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.14V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 15 µA

Current - Supply (Max):: -

PSRR:: 65dB ~ 40dB (100Hz ~ 1MHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Under Voltage Lockout (UVLO)

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-X2SON (1x1)

TPS7A2040PDQNR FAQ

1.How can I place an order for TPS7A2040PDQNR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS7A2040PDQNR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS7A2040PDQNR reliable?

The price and inventory of TPS7A2040PDQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A2040PDQNR is usually 5 days.

3.What payment methods are accepted for TPS7A2040PDQNR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A2040PDQNR transactions.

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4.How is shipping managed for TPS7A2040PDQNR?

TPS7A2040PDQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS7A2040PDQNR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS7A2040PDQNR?

For technical support, including TPS7A2040PDQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A2040PDQNR requirements.

6.How does Aetrix verify that TPS7A2040PDQNR is sourced from the original manufacturer or authorized distributors?

All TPS7A2040PDQNR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS7A2040PDQNR meets industry standards.

7.What is the process for return or replacement of TPS7A2040PDQNR?

All TPS7A2040PDQNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A2040PDQNR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS7A2040PDQNR part is unused and in its original packaging.

Return procedure for TPS7A2040PDQNR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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