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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearTPS7A2045PDBVR
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TPS7A2045PDBVR - Texas Instruments

Manufacturer Part Number
TPS7A2045PDBVR
Manufacturer
Texas Instruments
Allelco Part Number
32D-TPS7A2045PDBVR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
200,980 pcs available, New & Original
Parts Description
IC POWER
Package
SOT-23-5
Data sheet
TPS7A2045PDBVR.pdf
RoHs Status
 
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  • Unit Price: $0.219
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5+ $0.219 $1.10
50+ $0.182 $9.10
150+ $0.166 $24.90
500+ $0.145 $72.50
3000+ $0.137 $411.00
6000+ $0.131 $786.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

TPS7A2045PDBVR Tech Specifications
Texas Instruments - TPS7A2045PDBVR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS7A2045PDBVR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage Dropout (Max) 0.145V @ 300mA
Voltage - Output (Min/Fixed) 4.5V
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

TPS7A2045PDBVR Image
TPS7A2045PDBVR (1)

Manufacturer Part Number

TPS7A2045PDBVR

Manufacturer

Texas Instruments

Introduction

Low Dropout Regulator for Power Management Applications

Product Features and Performance

Fixed 4.5V Output Voltage

Maximum 300mA Output Current

Low Dropout Voltage of 0.145V at 300mA

High PSRR of 65dB at 100Hz and 40dB at 1MHz

Low Quiescent Current of 15 µA

Operating Temperature Range from -40°C to 125°C

Product Advantages

Stable with Low-ESR Ceramic Output Capacitors

High Power Supply Rejection Ratio

Low Quiescent Current for Power-Saving

Fast Start-Up with Soft Start Feature

Key Technical Parameters

Input Voltage up to 6V

Positive Output Configuration

Single Output Regulator

Fixed Output Type

PSRR: 65dB ~ 40dB from 100Hz to 1MHz

Quality and Safety Features

Over Current Protection

Over Temperature Protection

Under Voltage Lockout

Compatibility

Compatible with Surface Mount Technology

SOT-23-5 Package for Easy Integration

Application Areas

Consumer Electronics

Industrial Controls

Portable Devices

Power Management Solutions

Product Lifecycle

Active Product Status

Non-disclosure of Discontinuation

Availability of Replacements or Upgrades Not Specified

Several Key Reasons to Choose This Product

High Efficiency for Battery-Powered Applications

Robust Protection Features for Reliable Operation

Low Dropout Performance for Better Voltage Regulation

Compact Packaging Suitable for Space-Constrained Applications

Extended Operating Temperature Range for Versatility

Frequently Asked Questions(FAQ)

How does the TPS7A2045PDBVR compare to other fixed-output LDOs in terms of quiescent current and dropout voltage under 300mA load, and what are the implications for low-power battery applications?
The TPS7A2045PDBVR draws only 15 µA of quiescent current (IQ), which is significantly lower than many general-purpose LDOs that typically exhibit IQ values between 25 µA and 80 µA. This ultra-low leakage supports extended battery life in always-on systems such as IoT sensors or wearable devices. Additionally, its maximum dropout voltage of 145 mV at 300 mA is among the lowest available for a 4.5V fixed output regulator, enabling efficient operation with input voltages close to the required rail. When paired with a 4.65V supply, the output can remain stable without significant power dissipation. These characteristics make it well-suited for space-constrained, energy-sensitive designs where both efficiency and small form factor are critical.
What design considerations should be taken into account when selecting input capacitance for the TPS7A2045PDBVR to ensure stability and transient response in high-impedance source environments?
The TPS7A2045PDBVR requires careful attention to input capacitance selection due to its internal compensation architecture. While the datasheet specifies a minimum input capacitance of 1 µF, using ceramic capacitors with low equivalent series resistance (ESR)—such as X5R or X7R types—is essential to maintain phase margin and prevent oscillation. In applications powered by batteries or long cable traces with inductive characteristics, a higher-value capacitor (e.g., 2.2 µF to 10 µF) may be necessary to dampen ringing and improve line regulation. It is also recommended to place the capacitor within 5 mm of the VIN pin and include a small bypass capacitor (0.1 µF) near the IC to filter high-frequency noise. Failure to meet these layout guidelines can lead to instability or degraded transient performance.
Can the TPS7A2045PDBVR operate reliably in automotive-grade thermal conditions, and how do its protection features support system robustness in harsh environments?
Yes, the TPS7A2045PDBVR is rated for junction temperatures from -40°C to +125°C, making it suitable for automotive and industrial applications exposed to wide temperature swings. Its integrated protections—over-current (OCP), over-temperature (OTP), and under-voltage lockout (UVLO)—are designed to safeguard both the device and downstream circuitry during fault conditions. For instance, OCP limits output current to approximately 300 mA plus a safety margin, preventing damage from shorted loads. OTP automatically disables the pass element if thermal thresholds exceed safe operating limits, resuming normal operation after cooling. UVLO ensures the regulator remains off until the input voltage reaches a minimum threshold, avoiding erratic behavior at brownout conditions. These features collectively enhance reliability in mission-critical systems.
How does the PSRR performance of the TPS7A2045PDBVR degrade across frequency, and what impact does this have on noise-sensitive analog front-ends like ADC drivers?
The TPS7A2045PDBVR exhibits a peak PSRR of 65 dB at low frequencies (e.g., 100 Hz) that gradually decreases to around 40 dB at 1 MHz. This roll-off occurs because the internal error amplifier bandwidth limits high-frequency rejection capability. In precision analog circuits driven by ADCs requiring clean supply rails, this degradation means that switching regulators or noisy digital clocks conducted through the supply can couple into sensitive nodes. To mitigate this, designers often add LC filters or additional post-regulation stages after the LDO. Alternatively, bypassing the output with a 0.1 µF capacitor can help attenuate higher-frequency ripple, though it does not restore full PSRR. For best results, the input stage should itself be well-filtered before reaching the TPS7A2045PDBVR.
What is the significance of the soft-start feature on the TPS7A2045PDBVR, and how does it influence inrush current management during system boot-up?
The soft-start function built into the TPS7A2045PDBVR controls the ramp rate of the output voltage during power-up, limiting the initial surge of current drawn from the input source. Without soft start, a sudden enable signal could cause the output capacitor to charge rapidly, drawing up to 300 mA instantaneously and potentially exceeding the input current rating of upstream supplies or triggering protection circuits prematurely. With soft start, the rise time is internally controlled, typically resulting in a smoother transition that reduces peak inrush current by up to 70%. This is particularly valuable in systems with limited input capacitance or those sharing power lines with other active components, helping avoid cascading faults and improving overall system reliability during initialization sequences.
How does the TPS7A2045PDBVR compare to adjustable LDO alternatives like the TPS7A20xx series when targeting fixed 4.5V outputs in compact PCB layouts?
Although adjustable versions such as the TPS7A20xx exist, the fixed-output TPS7A2045PDBVR eliminates external resistor networks required for setting output voltage, simplifying PCB routing and reducing component count. This makes it ideal for space-constrained designs where board real estate is at a premium. Additionally, fixed-output variants often achieve marginally better noise performance and faster transient response due to optimized internal feedback loops. However, adjustable regulators offer flexibility if future voltage changes are anticipated. For static 4.5V requirements—common in logic rails or sensor power domains—the TPS7A2045PDBVR provides a more streamlined, cost-effective solution with comparable efficiency and protection features.
What precautions must be observed regarding ESD sensitivity and handling during assembly of the TPS7A2045PDBVR in mass production environments?
The TPS7A2045PDBVR has an Moisture Sensitivity Level (MSL) of 1, indicating it poses no special moisture-related risks and can be stored indefinitely under proper conditions. However, despite this classification, electrostatic discharge (ESD) protection is not guaranteed unless handled according to standard JEDEC guidelines. During automated pick-and-place operations, anti-static workstations and grounded equipment should be used to minimize human-body model (HBM) and machine-model (MM) exposure. Although the device includes internal ESD diodes, prolonged exposure beyond typical thresholds may compromise reliability over time. Implementing ESD-safe packaging and following IPC-A-610 Class 3 standards during reflow soldering further ensures consistent yield and long-term functionality in high-volume manufacturing.
In what scenarios would the TPS7A2045PDBVR’s enable pin be preferred over direct supply connection, and how does this affect system-level control strategies?
Using the dedicated EN pin instead of connecting directly to VIN allows precise sequencing and shutdown control independent of the main power rail. This enables features like power-down modes in microcontrollers or coordinated startup/shutdown across multiple ICs in complex SoCs. For example, delaying the activation of the TPS7A2045PDBVR relative to a processor’s core voltage regulator can prevent back-feeding and reduce total system quiescent current. The EN pin operates with a logic-compatible threshold, accepting signals as low as 1.1 V, which facilitates integration with digital control buses. Proper pull-up or pull-down resistors (typically 10 kΩ) should be used to define default states and avoid floating inputs during brownout events.
What trade-offs exist between using the TPS7A2045PDBVR versus switching regulators when aiming for minimal power loss in portable medical devices?
Switching regulators generally offer superior efficiency (>90%) compared to linear regulators like the TPS7A2045PDBVR, which dissipate power as heat proportional to (VIN - VOUT) × IOUT. At 4.5V output and a 4.6V input, the TPS7A2045PDBVR dissipates only ~6 mW at full load, which seems favorable, but in practice, input voltages may vary from 4.8V to 6V, increasing losses significantly. Moreover, switching regulators introduce high-frequency ripple and electromagnetic interference (EMI), complicating compliance with medical device regulations. The TPS7A2045PDBVR, while less efficient under wider Vin ranges, provides inherently quiet, tightly regulated output ideal for sensitive instrumentation. Thus, the choice hinges on whether absolute efficiency or signal integrity takes precedence in the application context.
How does thermal derating affect the continuous output current capability of the TPS7A2045PDBVR in open-air vs. enclosed PCB configurations?
In free-air environments with adequate airflow, the TPS7A2045PDBVR can deliver its full-rated 300 mA continuously without exceeding the 125°C junction temperature limit. However, in sealed enclosures or densely populated boards with poor convection, self-heating causes the junction temperature to rise above ambient. For every 300 mA delivered with a 2V drop (e.g., at 6.5V input), the die heats up by roughly 15°C above case temperature. If the ambient temperature is 70°C, the junction could reach 85°C—still within limits—but at higher loads or tighter spacing, derating becomes necessary. As a rule of thumb, output current should be reduced by 10% per 20°C increase in case temperature above 50°C to maintain margin against thermal runaway.
Why might a designer choose the SOT-23-5 package of the TPS7A2045PDBVR over larger packages like TO-252, despite similar electrical performance?
The SC-74A/SOT-23-5 package measures just 2.9 mm x 1.6 mm, enabling higher component density and smaller PCBs—critical in handheld electronics or wearables. Its small footprint reduces parasitic inductance and improves high-frequency response compared to larger packages with longer leads. Although thermal performance is modest, it suffices for moderate loads and short trace lengths. Additionally, automated assembly processes favor small-outline transistors for cost-effective mass production. While TO-252 offers better heat sinking, the TPS7A2045PDBVR’s internal structure and low-power profile make SOT-23-5 adequate for most non-heat-intensive tasks, balancing size, cost, and manufacturability.
How does the TPS7A2045PDBVR handle reverse polarity protection, and what external components might be needed if the input line is susceptible to accidental inversion?
The TPS7A2045PDBVR does not include inherent reverse polarity protection; applying negative voltage to VIN can damage the device. To mitigate this risk, a Schottky diode placed in series with the input—configured to conduct only during correct polarity—can block reverse current flow. Alternatively, MOSFET-based solutions using P-channel or N-channel transistors offer lower voltage drop and reduced power loss compared to discrete diodes. Placement of the protection network close to the connector or power entry point prevents backfeeding into the entire circuit. Designers should verify that the added component does not interfere with UVLO thresholds or soft-start timing under normal operation.
What role does the base product number TPS7A2045 play in supply chain management when sourcing the TPS7A2045PDBVR across different distributors?
The base part number TPS7A2045 refers to the core regulator function without specifying packaging, which aids in cross-referencing compatible variants. Suppliers often list TPS7A2045 alongside multiple package options (e.g., SOT-23-5, WSON), allowing procurement teams to compare availability and lead times. However, the full TI-specific part number TPS7A2045PDBVR uniquely identifies the exact package (SOT-23-5), tape-and-reel format, and RoHS compliance status. Using the complete number minimizes ambiguity during RFQs and reduces the risk of ordering incorrect variants, ensuring alignment with PCB footprints and assembly instructions in manufacturing workflows.
How does the TPS7A2045PDBVR perform in terms of output voltage accuracy under temperature extremes, and what calibration strategies might be necessary for precision applications?
The output voltage tolerance of the TPS7A2045PDBVR is typically ±2% initially, but this can drift with temperature due to internal reference variations. Over the -40°C to +125°C range, the total deviation may approach ±3%, affecting measurement accuracy in analog systems. For applications requiring tighter control (e.g., ±0.5%), external trimming using digital potentiometers or laser-calibrated resistors may be employed—though this adds complexity. Alternatively, selecting a higher-accuracy reference IC downstream or implementing software correction via microcontroller readings can compensate for residual errors without altering hardware design.
What are the key differences between the TPS7A2045PDBVR and similar devices from other manufacturers like the MIC5219 or AP2112K when evaluating dropout performance at partial loads?
While the MIC5219 and AP2112K also target 300 mA LDO applications, their dropout voltages at light loads (e.g., 1 mA) tend to be higher—often exceeding 300 mV—compared to the TPS7A2045PDBVR’s 145 mV max even at full load. This advantage becomes pronounced when operating near the nominal output voltage, where efficiency drops sharply in competing parts. Furthermore, the TPS7A2045PDBVR’s ultra-low IQ of 15 µA outperforms many rivals in standby mode, extending battery runtime. However, some alternatives offer slightly better PSRR at mid-frequencies or lower noise density, so trade-offs depend on specific noise budgets and input-output differential constraints in the final system.
How does the enable pin’s logic threshold interact with brownout conditions, and what safeguards prevent unintended resets in battery-powered systems using the TPS7A2045PDBVR?
The EN pin on the TPS7A2045PDBVR activates when VIN exceeds approximately 1.1 V, which is well below the 4.5V output level. This means the regulator can remain enabled even during mild brownouts, potentially leading to unstable operation if VIN drops too low. To prevent this, designers should monitor VIN independently or use a supervisor IC to gate the EN signal based on actual input health. Alternatively, configuring the EN pin with hysteresis via an RC network tied to VIN creates a delayed turn-off during dips, avoiding rapid cycling. Careful consideration of EN timing relative to system reset signals ensures coherent state preservation during power anomalies.
What environmental certifications and regulatory classifications apply to the TPS7A2045PDBVR, and how do they influence global deployment strategies?
The TPS7A2045PDBVR complies with RoHS3 directives, eliminating hazardous substances like lead, mercury, and cadmium, facilitating export to regions with strict environmental laws such as the EU and China. It carries an ECCN code of EAR99, indicating it is not subject to U.S. export restrictions unless used in military or embargoed applications. HTSUS classification 8542.39.0001 applies for customs purposes in North America, while REACH status confirms absence of SVHC concerns. These attributes simplify compliance documentation and support deployment in consumer, industrial, and medical markets without requiring additional regulatory validation steps.
When integrating the TPS7A2045PDBVR into a multi-rail system, how should output capacitance selection balance stability, transient response, and cost considerations?
A typical recommendation for the TPS7A2045PDBVR is a 2.2 µF ceramic output capacitor with X5R dielectric, providing sufficient loop stabilization and fast recovery from load steps (<10 µs settling). Smaller values (e.g., 1 µF) risk instability, while larger ones (≥10 µF) increase BOM cost and slow response without meaningful benefit. Tantalum capacitors can be used but require ESR monitoring to avoid marginal stability. Placing the capacitor within 5 mm of the OUT pin minimizes parasitic inductance, preserving transient fidelity. In cost-sensitive designs, a single 2.2 µF MLCC suffices, whereas high-performance systems might cascade with LC filters for enhanced ripple attenuation.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TPS7A2045PDBVR

Product Attribute TPS7A2055PDBVR TPS7A2042PDBVR TPS7A2050PDBVR TPS7A2045PDQNR
Part Number TPS7A2055PDBVR TPS7A2042PDBVR TPS7A2050PDBVR TPS7A2045PDQNR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
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
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output Type - Current - Unbuffered Voltage - Buffered -
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current - Output - - - -
Voltage - Output (Max) - - - -
PSRR - - - -
Voltage - Output (Min/Fixed) - - - -
Control Features - - - -
Protection Features - - - -
Output Configuration - - - -
Voltage - Input (Max) - - - -
Current - Quiescent (Iq) - - - -
Number of Regulators - - - -
Voltage Dropout (Max) - - - -
Series - - - -

TPS7A2045PDBVR Datasheet PDF

Download TPS7A2045PDBVR pdf datasheets and Texas Instruments documentation for TPS7A2045PDBVR - Texas Instruments.

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

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TPS7A2045PDBVR Image

TPS7A2045PDBVR

Texas Instruments
32D-TPS7A2045PDBVR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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