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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearTPS7A2055PDBVR
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TPS7A2055PDBVR - Texas Instruments

Manufacturer Part Number
TPS7A2055PDBVR
Manufacturer
Texas Instruments
Allelco Part Number
32D-TPS7A2055PDBVR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
253,070 pcs available, New & Original
Parts Description
IC POWER
Package
SOT-23-5
Data sheet
TPS7A2055PDBVR.pdf
RoHs Status
 
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Specifications

TPS7A2055PDBVR Tech Specifications
Texas Instruments - TPS7A2055PDBVR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS7A2055PDBVR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage Dropout (Max) 0.145V @ 300mA
Voltage - Output (Min/Fixed) 5.5V
Voltage - Output (Max) -
Voltage - Input (Max) 6V
Supplier Device Package SOT-23-5
Series -
Protection Features Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Package / Case SC-74A, SOT-753
Package Tape & Reel (TR)
Product Attribute Attribute Value
PSRR 65dB ~ 40dB (100Hz ~ 1MHz)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 125°C (TJ)
Number of Regulators 1
Mounting Type Surface Mount
Current - Quiescent (Iq) 15 µA
Current - Output 300mA
Control Features Enable, Soft Start

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status Not applicable
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

TPS7A2055PDBVR Image
TPS7A2055PDBVR (1)

Manufacturer Part Number

TPS7A2055PDBVR

Manufacturer

Texas Instruments

Introduction

The TPS7A2055PDBVR from Texas Instruments is a low-dropout (LDO) voltage regulator designed for power-sensitive applications, providing a fixed output voltage of 5.5V from an input of up to 6V.

Product Features and Performance

Low dropout voltage: 0.145V at 300mA load

Output voltage: Fixed at 5.5V

Maximum input voltage: 6V

Output current: Up to 300mA

Quiescent current: 15 µA, enhancing battery life

PSRR: 65dB to 40dB range from 100Hz to 1MHz, ensuring stable operation against line and load changes

Control features include Enable and Soft Start for gradual power-up

Protection against Over Current, Over Temperature, and Under Voltage Lockout (UVLO)

Product Advantages

High efficiency with low dropout voltage

Long battery life due to low quiescent current

High PSRR ensuring output voltage stability

Comprehensive protection enhances device reliability

TPS7A2055PDBVR Image
TPS7A2055PDBVR (2)

Key Technical Parameters

Voltage Input (Max): 6V

Voltage Output (Min/Fixed): 5.5V

Voltage Dropout (Max): 0.145V @ 300mA

Current Output: 300mA

Current Quiescent (Iq): 15 µA

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

Operating Temperature: -40°C ~ 125°C

Quality and Safety Features

Over Current Protection

Over Temperature Protection

Under Voltage Lockout (UVLO)

Compatibility

Surface Mount mounting type

Compatible with SC-74A, SOT-753 package devices

Application Areas

Battery-powered devices

Portable consumer electronics

Medical and healthcare equipment

Industrial controls

Product Lifecycle

Status: Active

Not nearing discontinuation, with continuous support and availability

Several Key Reasons to Choose This Product

Reliable performance from a reputable manufacturer, Texas Instruments

High efficiency and low quiescent current benefit power-sensitive applications

Comprehensive safety features ensuring device protection and longevity

Suitable for a wide range of applications due to versatile features and broad operating temperature range

Active product lifecycle status ensures long-term availability and support

Frequently Asked Questions(FAQ)

What are the key thermal and efficiency considerations when using the TPS7A2055PDBVR in a 300mA linear regulator application?
The TPS7A2055PDBVR exhibits a maximum voltage dropout of 0.145V at full load, which implies that for a 5.5V output, the minimum input must be at least 5.645V to maintain regulation under all conditions. At an input-to-output differential of 0.5V with a 300mA load, the power dissipated by the device is approximately 150mW, requiring careful attention to PCB thermal layout or heatsinking despite the small SOT-23-5 package. Given its quiescent current of 15µA, efficiency remains reasonable in low-power modes but drops under high load due to the inherent I²R losses in linear regulation. Designers should evaluate whether the dropout voltage and resulting heat generation are acceptable for their system’s operating envelope.
How does the TPS7A2055PDBVR compare to other fixed-output LDOs like the TPS7A2055PDBVT in terms of package compatibility and board footprint requirements?
Both the TPS7A2055PDBVR (Reel) and TPS7A2055PDBVT (Tape and Reel) share identical electrical characteristics and are housed in the same SOT-23-5 package, ensuring mechanical and thermal performance parity across both packaging formats. The only functional distinction lies in supply chain logistics—the R variant typically denotes standard reel packaging suitable for automated assembly, while the V variant may imply tape-and-reel configuration optimized for pick-and-place systems. From a design perspective, no differences in layout, trace routing, or decoupling requirements exist between the two; engineers can substitute one for the other without altering circuit behavior, provided the procurement specification matches the desired packaging format for manufacturing.
Can the TPS7A2055PDBVR safely operate with input voltages near its maximum rating of 6V, especially during transient surges?
Yes, the TPS7A2055PDBVR is rated for continuous operation up to 6V absolute maximum on the input pin, as long as the junction temperature stays within -40°C to 125°C. However, sustained operation at 6V with a 5.5V output results in a 0.5V dropout condition at 300mA, dissipating roughly 150mW. In such cases, prolonged exposure may require derating based on ambient temperature and PCB copper area for adequate heat dissipation. Transient spikes above 6V are not recommended unless clamped by external protection circuitry like TVS diodes, since the internal ESD structures are not designed for continuous overvoltage conditions.
What role does the enable pin play in optimizing power consumption when using the TPS7A2055PDBVR in battery-powered systems?
The enable pin on the TPS7A2055PDBVR allows shutdown control independent of the input voltage, reducing quiescent current from 15µA down to less than 1µA during inactive periods. This feature is particularly valuable in portable applications where minimizing sleep-mode power drain extends battery life. By pulling the enable pin low, the regulator enters a high-impedance state, effectively disconnecting the load from the output while maintaining minimal leakage. Designers should ensure that the enable signal is driven by a stable logic level compatible with the system microcontroller to avoid unintended turn-on events.
How does the soft-start functionality of the TPS7A2055PDBVR impact inrush current during startup?
The integrated soft-start feature limits the ramp rate of the output voltage during power-up, which inherently reduces peak inrush current into capacitive loads. For instance, with a typical soft-start time constant of several hundred microseconds, charging a 10µF output capacitor would draw significantly less current compared to an abrupt enable transition. This helps prevent upstream voltage droop or triggering of overcurrent protections in adjacent circuits. Engineers can rely on this behavior without additional components, simplifying design while enhancing system stability.
Is it necessary to add external filtering capacitors beyond what is specified in the datasheet when implementing the TPS7A2055PDBVR?
The TPS7A2055PDBVR is designed to function reliably with standard ceramic input and output capacitors as outlined in the datasheet recommendations—typically 1µF or higher on both input and output. Under most conditions, no additional filtering is required. However, in environments with significant switching noise or rapid load transients, adding a small series resistor (e.g., 0.1Ω–1Ω) in conjunction with a bulk capacitor may improve stability margins. That said, excessive capacitance increases soft-start duration and could stress the enable circuitry if not coordinated properly.
How does the PSRR performance of the TPS7A2055PDBVR vary across frequency, and what implications does this have for sensitive analog subsystems?
The TPS7A2055PDBVR provides a PSRR of 65dB at low frequencies (e.g., 100Hz) that decreases to around 40dB at higher frequencies (up to 1MHz). This means it attenuates line ripple well at DC and sub-kHz ranges but becomes less effective at suppressing high-frequency noise from switching sources. In mixed-signal designs where clean power rails are critical for ADC accuracy or RF performance, supplemental filtering or post-regulation stages may still be needed. The relatively modest high-end PSRR suggests that placing the LDO after a pre-regulator stage improves overall system noise immunity.
What precautions should be taken regarding layout and grounding when deploying the TPS7A2055PDBVR in space-constrained PCBs?
Due to its compact SOT-23-5 footprint, the TPS7A2055PDBVR demands attention to high-current return paths and ground plane continuity. The exposed thermal pad must be connected to a solid ground plane beneath the IC to maximize heat spreading and minimize thermal resistance. Decoupling capacitors should be placed as close as possible to the VIN and GND pins, with short, wide traces to reduce parasitic inductance. Avoid routing high-speed signals near the regulator outputs to prevent coupling of switching artifacts back into sensitive loads.
How does the under-voltage lockout (UVLO) threshold influence system reliability during brown-out events?
The TPS7A2055PDBVR includes built-in UVLO protection that disables the output if the input voltage falls below a certain threshold—typically around 3.2V depending on exact implementation. This prevents erroneous operation under undervoltage conditions, which could otherwise lead to unstable output levels or excessive dropout-induced heating. During brown-out scenarios where the supply dips briefly below the nominal range, the UVLO ensures a clean shutdown, protecting downstream components from brownout-related damage. Designers do not need to implement external UVLO circuits unless finer control over turn-on thresholds is required.
Can multiple TPS7A2055PDBVR regulators be paralleled to increase available current?
No, paralleling the TPS7A2055PDBVR is not recommended due to its fixed output voltage architecture and lack of active current sharing mechanisms. Without precise matching of internal reference tolerances and feedback networks, one regulator may dominate current delivery while others remain underutilized, leading to thermal imbalance and potential failure points. Instead, designers should use discrete components capable of current sharing or consider alternative regulators explicitly rated for parallel operation if higher current capacity is needed.
What environmental and regulatory factors should be considered when sourcing the TPS7A2055PDBVR for commercial versus industrial applications?
The TPS7A2055PDBVR operates over an extended temperature range (-40°C to 125°C), making it suitable for both industrial and commercial environments. However, note that RoHS compliance status is listed as "Not applicable," which may indicate restricted usage in certain regions or industries requiring full compliance. Additionally, MSL Level 1 confirms unlimited shelf life prior to assembly, simplifying storage logistics. Engineers should verify end-of-life projections and substitution risks, as part discontinuations could affect long-term production planning.
How does the current limit threshold behave under fault conditions such as short-circuit or overload?
The TPS7A2055PDBVR features overcurrent protection that clamps the output current to a safe level during faults like output shorts. While the exact trip point isn’t always disclosed, it generally allows brief surge currents up to several hundred milliamps before entering hiccup mode or foldback limiting. This protects both the regulator and connected circuitry from catastrophic failure. Unlike some older LDOs that fail open, this device typically recovers automatically once the fault is removed, supporting robust fault tolerance in real-world deployments.
What are the implications of using the TPS7A2055PDBVR with inductive loads, such as motors or relays?
When driving inductive loads, reverse current flows through parasitic diodes upon deactivation, which can stress the output capacitor and potentially trigger overvoltage conditions. Although the TPS7A2055PDBVR lacks built-in flyback protection, adding a Schottky diode in parallel with the load (cathode to output) provides a discharge path for inductive kickback. This simple addition enhances reliability without compromising the regulator’s primary function, ensuring stable operation even with dynamic loads.
Does the TPS7A2055PDBVR support adjustable output voltages, or is it strictly fixed?
The TPS7A2055PDBVR is a fixed-output device with a nominal output voltage of 5.5V, as indicated by its part number suffix "55". It does not include external feedback resistors or adjustment pins, meaning the output cannot be tuned to arbitrary values. For variable-output needs, designers must select a different member of the TPS7A20xx family or incorporate an external pass element and resistor divider, though this would alter performance characteristics and require additional validation.
How does the choice of input source affect dropout voltage and overall system efficiency when using the TPS7A2055PDBVR?
Dropout voltage directly impacts efficiency: for every volt of headroom lost, more power is dissipated as heat. If the input comes from a lithium-ion battery (4.2V max) with a target output of 5.5V, regulation is impossible due to insufficient headroom—highlighting the importance of selecting an appropriate input voltage domain. Conversely, using a 5.8V or 6V source maintains regulation with minimal loss. Thus, system architects must align the regulator selection with the anticipated supply range to balance efficiency, thermal budget, and operational feasibility.
Are there any known limitations regarding output capacitor ESR when using the TPS7A2055PDBVR?
The TPS7A2055PDBVR requires stable output capacitance with moderate ESR for phase margin maintenance, particularly with ceramic capacitors having very low ESR. Using ultra-low-ESR ceramics without compensation may result in instability or oscillation under light-load conditions. In such cases, adding a small series resistor (e.g., 1Ω–10Ω) between the output capacitor and the regulator can restore stability. Always consult simulation models and test boards when pushing the limits of capacitive loading.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TPS7A2055PDBVR

Product Attribute TPS7A2050PDBVR TPS7A2045PDBVR TPS7A2042PDBVR TPS7A2425DBVR
Part Number TPS7A2050PDBVR TPS7A2045PDBVR TPS7A2042PDBVR TPS7A2425DBVR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
PSRR - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Regulators - - - -
Voltage - Output (Max) - - - -
Control Features - - - -
Current - Quiescent (Iq) - - - -
Protection Features - - - -
Voltage Dropout (Max) - - - -
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Output (Min/Fixed) - - - -
Current - Output - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Input (Max) - - - -
Output Configuration - - - -

TPS7A2055PDBVR Datasheet PDF

Download TPS7A2055PDBVR pdf datasheets and Texas Instruments documentation for TPS7A2055PDBVR - Texas Instruments.

PCN Packaging
Additional Binary Codes 03/Oct/2022.pdf

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TPS7A2055PDBVR Image

TPS7A2055PDBVR

Texas Instruments
32D-TPS7A2055PDBVR

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