TPS7A2040PDQNR Tech Specifications
Texas Instruments - TPS7A2040PDQNR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS7A2040PDQNR

Product Attribute	Attribute Value
Part Number	TPS7A2040PDQNR
Package	X2SON-4(1x1)
Description	X2SON-4(1x1)
Stock Condition	Get 4540 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

TPS7A2040PDQNR

Manufacturer

texas-instruments

Introduction

The TPS7A2040PDQNR is a high-performance, low-dropout (LDO) linear voltage regulator from Texas Instruments. It is designed to provide a stable and efficient power supply for various electronic devices and systems.

Product Features and Performance

Low dropout voltage of 0.14V at 300mA load

Output current capability of 300mA

Quiescent current of only 15µA

Wide input voltage range up to 6V

Fixed output voltage of 4V

High power supply rejection ratio (PSRR) of 65dB at 100Hz, decreasing to 40dB at 1MHz

Enable control feature

Over-current, over-temperature, and under-voltage lockout (UVLO) protection

Product Advantages

Excellent efficiency and power savings

Compact and space-saving package

Reliable protection features for safe operation

Suitable for a wide range of applications

Key Reasons to Choose This Product

Exceptional performance and power efficiency

Robust protection circuitry for reliable operation

Versatile design for use in various electronic devices

Compact package for space-constrained applications

Quality and Safety Features

Designed and manufactured to Texas Instruments' high-quality standards

Thermal protection and over-current limiting for safe operation

Compatibility

The TPS7A2040PDQNR is a general-purpose LDO regulator and can be used in a wide range of electronic applications, such as portable devices, industrial equipment, and consumer electronics.

Application Areas

Portable electronics

Industrial automation and control systems

Consumer and home electronics

Telecommunications equipment

Automotive electronics

Product Lifecycle

The TPS7A2040PDQNR is an active product, and our website's sales team continues to support it. There are no immediate plans for discontinuation. If you require information about equivalent or alternative models, please contact our website's sales team.

Frequently Asked Questions(FAQ)

How does the TPS7A2040PDQNR compare to a standard LDO like the LM338 in terms of quiescent current and efficiency at light loads when powering an always-on microcontroller system?: The TPS7A2040PDQNR delivers a quiescent current (Iq) of just 15 µA, which is significantly lower than most standard linear regulators such as the LM338, where Iq typically exceeds 100 µA under similar conditions. This ultra-low Iq makes the TPS7A2040PDQNR ideal for battery-powered or energy-sensitive applications where the regulator is often idle, such as in always-on sensor nodes or IoT devices. In contrast, the LM338 maintains higher leakage currents even when unloaded, leading to reduced overall system efficiency over time. When designing for long-term battery life, this difference becomes critical—especially when combined with the TPS7A2040PDQNR’s low dropout voltage of 0.14V at 300mA.

Can the TPS7A2040PDQNR safely operate from a 6V input while delivering 300mA to a load, and what are the implications for thermal performance in compact PCB layouts?: Yes, the TPS7A2040PDQNR supports a maximum input voltage of 6V and can deliver up to 300mA continuously. However, if the output is fixed at 4V, the power dissipated across the regulator during full-load operation is (6V – 4V) × 0.3A = 0.6W. With a small 4-X2SON package (1x1mm), the thermal resistance (θJA) may be around 60°C/W without proper copper plane attachment, leading to a junction temperature rise of approximately 36°C above ambient under still-air conditions. Engineers must account for this by using thermal vias or ensuring adequate airflow; otherwise, derating below 300mA may be necessary in tightly packed designs.

What are the key differences between the TPS7A2040PDQNR and a switching regulator like the TPS62130 when targeting noise-sensitive analog circuits?: While the TPS62130 is highly efficient and suitable for high-current applications, the TPS7A2040PDQNR offers superior PSRR—ranging from 40dB to 65dB across 100Hz to 1MHz—making it far more effective at suppressing ripple in sensitive analog subsystems such as ADC reference rails or RF front-ends. Switching regulators like the TPS62130 generate significant high-frequency noise that can couple into nearby traces unless heavily filtered. In contrast, the TPS7A2040PDQNR provides a clean, stable output without requiring additional LC filtering in many cases. However, this comes at the cost of lower efficiency at high input-to-output differential voltages, which should be evaluated based on the specific power budget.

Is the TPS7A2040PDQNR suitable for automotive applications, and how does its protection circuitry support reliability in harsh environments?: Although the TPS7A2040PDQNR operates over a wide temperature range (-40°C to 125°C), it is not officially qualified to AEC-Q100 standards, so it cannot be used as a primary supply in certified automotive systems without additional validation. That said, its built-in protections—overcurrent, overtemperature, and under-voltage lockout (UVLO)—provide robust fault tolerance against transient surges, reverse polarity events, and brownouts common in industrial settings. These features enhance reliability in non-automotive but electrically noisy environments such as factory automation or outdoor instrumentation.

How does the enable pin functionality of the TPS7A2040PDQNR affect system power sequencing compared to always-on LDOs?: The TPS7A2040PDQNR includes a dedicated enable (EN) pin that allows external control over regulation state, enabling precise power sequencing in multi-supply systems. Unlike fixed-enable LDOs that draw standby current even when powered, pulling the EN pin low reduces Iq to near-zero, effectively shutting down the regulator. This capability supports low-power modes in microcontrollers or communication modules where the main rail must remain off until wake-up signals arrive, thereby minimizing total system leakage current during sleep cycles.

What considerations apply when selecting bypass capacitors for the TPS7A2040PDQNR to ensure stability across varying load transients?: For stable operation, the TPS7A2040PDQNR requires a ceramic input capacitor (typically ≥1µF X7R or X5R) placed within 1cm of the VIN pin to handle high-speed transients and maintain loop stability. The datasheet specifies a minimum output capacitance of 2.2µF with ESR between 1mΩ and 100mΩ. Using excessively large capacitance or very low-ESR types like ceramic-only configurations may lead to overshoot during startup or oscillation under certain load steps. Engineers should verify transient response with actual load profiles rather than relying solely on nominal values.

How does the TPS7A2040PDQNR perform in terms of output voltage accuracy and noise floor when used to bias precision op-amps?: The TPS7A2040PDQNR exhibits typical output voltage accuracy of ±1% over temperature and load, which is sufficient for most precision analog blocks. Its ultra-low-noise architecture achieves an output noise density of ~20µV RMS from 10Hz to 100kHz, making it appropriate for driving sensitive amplifiers where supply-induced distortion must be minimized. Compared to older LDOs with higher ripple and noise floors (>100µV RMS), the TPS7A2040PDQNR enables better SNR in audio or measurement systems, though careful layout is still required to avoid coupling from adjacent digital lines.

Can multiple TPS7A2040PDQNR regulators be paralleled to increase output current capacity?: No, paralleling the TPS7A2040PDQNR is not recommended due to internal mismatches in reference voltage and feedback thresholds, which can cause one device to dominate current sharing and potentially overheat. Instead, designers should select a single regulator rated for the total required current or use a dedicated load-sharing IC if redundancy is needed. Attempting to parallel units without isolation diodes or active balancing risks damaging the devices and compromises reliability in mission-critical applications.

What impact does package size have on thermal performance when implementing the TPS7A2040PDQNR in space-constrained wearable electronics?: The 4-X2SON (1x1mm) package of the TPS7A2040PDQNR occupies minimal board area, beneficial in compact wearables. However, its small footprint limits heat dissipation capabilities. In continuous operation at high input-output differentials (e.g., 5V to 4V at 300mA), the junction temperature can exceed 85°C even with 0.5oz copper planes unless thermal vias connect the exposed pad to inner ground layers. Without such measures, the device may enter thermal shutdown prematurely, forcing engineers to either reduce load current, accept shorter duty cycles, or choose a slightly larger but more thermally robust package.

How does the TPS7A2040PDQNR handle start-up behavior when enabled after a deep discharge event, and what safeguards prevent damage?: Upon enabling after a deeply discharged input (below UVLO threshold), the TPS7A2040PDQNR enters a controlled soft-start sequence to limit inrush current and prevent stress on downstream components. The UVLO feature ensures the regulator only activates when input voltage reaches a safe level (typically >4.2V), avoiding premature turn-on that could damage batteries or other elements. During this phase, the output ramps gradually, reducing the risk of glitches in sensitive loads like memory circuits or ADCs connected directly to the 4V rail.

In what scenarios would the dropout voltage of 0.14V at 300mA make the TPS7A2040PDQNR preferable over regulators with lower dropout?: The TPS7A2040PDQNR’s low dropout characteristic is advantageous when operating close to the regulated voltage, such as in Li-ion battery systems charged to 4.2V needing a stable 4V rail. Many conventional LDOs require 0.3V or more dropout, leaving little headroom before losing regulation—reducing usable capacity from the battery. With only 0.14V dropout at full load, the TPS7A2040PDQNR maintains regulation down to approximately 4.14V, preserving charge and extending runtime in portable devices where every millivolt counts.

How does the lack of RoHS compliance affect procurement and end-of-life planning for the TPS7A2040PDQNR in global markets?: Although the TPS7A2040PDQNR is widely available, its non-RoHS status means it contains restricted substances like lead or mercury above permissible limits, limiting its use in EU-regulated consumer electronics unless exemptions apply. Procurement teams must verify regional regulations and consider lead-free alternatives like the TPS7A2040RGWR (RoHS-compliant variant) if future design revisions require compliance. This also affects scrap handling protocols during manufacturing, necessitating segregation of non-compliant parts per environmental directives.

What precautions should be taken when replacing the TPS7A2040PDQNR in legacy designs to maintain compatibility?: Replacing the TPS7A2040PDQNR with another component requires matching key electrical parameters: fixed 4V output, 300mA capability, low Iq (<20µA), and similar dropout (<0.2V). Additionally, attention must be paid to pinout compatibility—especially the placement of the exposed pad and enable function—to avoid unintended circuit behavior. Mechanical fit is equally important; the 4-X2SON package demands precise land pattern alignment. Failure to validate these aspects risks layout mismatches, increased EMI susceptibility, or degraded thermal performance post-replacement.

How does the PSRR degradation at higher frequencies affect the use of the TPS7A2040PDQNR in clocked systems with switching noise sources nearby?: The TPS7A2040PDQNR’s PSRR drops from 65dB at 100Hz to about 40dB at 1MHz, meaning high-frequency switching noise from adjacent converters or motor drivers can more easily couple through to the output. While adequate for moderate noise environments, this limitation necessitates careful PCB partitioning, shielding, or supplemental filtering (e.g., second-order RC networks) when powering clocks or data converters sensitive to jitter. In such cases, combining the TPS7A2040PDQNR with localized ferrite beads or π-filters may be necessary to meet signal integrity requirements.

What role does the exposed pad play in enhancing reliability and performance of the TPS7A2040PDQNR during extended operational lifetimes?: The exposed pad on the TPS7A2040PDQNR serves dual purposes: it improves thermal conductivity by sinking heat directly to the PCB’s ground plane via solder attachment, lowering junction temperatures and improving long-term reliability. It also provides a low-inductance return path for high-frequency currents, reducing electromagnetic emissions and improving PSRR performance. Proper soldering and connection to a solid copper pour are essential—failure to do so increases thermal resistance and raises the risk of early failure due to thermal cycling fatigue in industrial or automotive-like stress conditions.

Can the TPS7A2040PDQNR be used to regulate negative voltages, and if not, what alternative TI solution would support bipolar supplies?: No, the TPS7A2040PDQNR is designed exclusively for positive fixed-output regulation and cannot produce negative rails. For bipolar systems requiring both +4V and -4V supplies, Texas Instruments recommends using dedicated negative regulators like the TPS7A02 series or integrating a charge pump followed by an LDO. Alternatively, some buck-boost controllers with integrated pass elements can generate symmetric rails, but each approach involves trade-offs in efficiency, noise, and component count that must align with system constraints.

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Common Countries Logistic Time Reference
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America	United States	5
America	Brazil	7
Europe	Germany	5
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	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

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1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
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TPS7A2040PDQNR

Texas Instruments
41D-TPS7A2040PDQNR

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Please refer to the English Version as our Official Version.Return

TPS7A2040PDQNR - Texas Instruments

Specifications

Parts Introduction

Manufacturer Part Number

Manufacturer

Introduction

Product Features and Performance

Product Advantages

Key Reasons to Choose This Product

Quality and Safety Features

Compatibility

Application Areas

Product Lifecycle

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

Write a Review

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QC (Quality Warranty)

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TPS7A2040PDQNR

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Please refer to the English Version as our Official Version.