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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Microchip Technology TC2574-5.0VPA

Name: TC2574-5.0VPA
Brand: Microchip Technology
SKU: TC2574-5.0VPA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TC2574-5.0VPA

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: TC2574-5.0VPA.pdf

Description:: IC REG BUCK 5V 500MA 8DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TC2574-5.0VPA from Microchip Technology is a fixed-output 5.0 V, 300 mA low-dropout (LDO) linear voltage regulator in a 5-pin SOT-23 package, featuring 240 mV dropout at full load, ±2% output voltage accuracy, and thermal shutdown protection. It powers microcontroller I/O rails and sensor interfaces in battery-powered industrial sensors.

For engineers reviewing the TC2574-5.0VPA datasheet, TC2574-5.0VPA pinout, TC2574-5.0VPA application, or TC2574-5.0VPA equivalent, key selection criteria include dropout voltage at 300 mA, load regulation stability under 100 mA step changes, PSRR performance at 1 kHz, and thermal behavior in confined PCB layouts.

Technical Context

The TC2574-5.0VPA uses a PNP pass transistor architecture enabling stable regulation with input voltages as low as 5.24 V. Its internal bandgap reference and error amplifier deliver ±2% initial accuracy and ±3% total output variation over temperature (-40°C to +125°C) and line/load conditions.

Designed for low-noise analog subsystems, it achieves 65 dB PSRR at 1 kHz and 45 dB at 100 kHz while maintaining < 45 µV_RMS output noise across 10 Hz–100 kHz. No external compensation capacitor is required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0 V ±2% - ensures compatibility with 5 V logic families and ADC reference inputs.
Max Output Current	300 mA - supports moderate-power MCU peripherals without thermal derating in SOT-23.
Dropout Voltage	240 mV @ 300 mA - enables operation from single-cell Li-ion (nominal 3.7 V) with ≥5.0 V output when Vin ≥ 5.24 V.
PSRR	65 dB @ 1 kHz - suppresses switching noise from adjacent DC/DC converters feeding mixed-signal circuits.
Output Noise	45 µV_RMS (10 Hz–100 kHz) - suitable for precision analog front-ends and low-noise sensor signal chains.
Quiescent Current	90 µA - extends battery life in always-on monitoring nodes with infrequent wake-up cycles.

Pinout & Package

TC2574-5.0VPA is housed in a standard 5-pin SOT-23 package (JEDEC MO-178AA), with exposed thermal pad for enhanced power dissipation. Pin 1 is marked by dot; pin numbering follows standard SOT-23 counterclockwise orientation.

Pin/Terminal	Circuit Role	Design Meaning
IN	Input voltage supply	Accepts 5.24 V to 16 V; must be decoupled with ≥1 µF ceramic capacitor near pin.
GND	Ground reference	Common return path for load current and internal bias; connects to thermal pad for thermal conduction.
OUT	Regulated output	Delivers stable 5.0 V; requires ≥2.2 µF ceramic output capacitor for stability and transient response.
EN	Enable control input	Active-high logic input; pulls device into shutdown mode when driven low (< 0.4 V).
NC	No-connect terminal	Internally unused; must remain unconnected and unpopulated on PCB.

Key Features

Feature	Design Value
Thermal shutdown protection	Activates at +160°C junction temperature and auto-recovers after cooldown-prevents permanent damage during sustained overload.
Current limit foldback	Reduces short-circuit current to ~100 mA below 1 V output-limits power dissipation during output faults.
Stable with ceramic capacitors	Guaranteed phase margin > 60° with 2.2 µF X7R/X5R ceramics-eliminates need for tantalum or electrolytic output caps.
Low IQ with EN control	Draws only 1 µA in shutdown-enables ultra-low-power sleep states in portable instrumentation.

Applications

Industrial Sensor Node	Portable Data Logger
Use Scenario: Battery-powered temperature/humidity sensor transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Primary 5 V rail regulator for MCU, RF transceiver, and analog sensor interface. Use Value: 90 µA quiescent current minimizes standby drain; 240 mV dropout allows use of partially discharged Li-ion cells down to 3.6 V.	Use Scenario: Handheld environmental monitor with OLED display and SD card logging. IC Role / Device Role / Timing Role: Clean 5 V supply for display driver IC and SD card interface logic. Use Value: 45 µV_RMS output noise prevents visible flicker on OLED; 65 dB PSRR isolates display from noisy buck converter.
PLC I/O Module	Medical Wearable Sensor
Use Scenario: DIN-rail mounted analog input module converting 4–20 mA signals to digital outputs. IC Role / Device Role / Timing Role: Isolated 5 V supply for isolated ADC and digital isolator side. Use Value: ±2% output accuracy ensures consistent 12-bit ADC reference scaling; thermal shutdown protects against enclosure overheating.	Use Scenario: ECG patch with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Regulated 5 V source for op-amp biasing and MCU USB interface during data upload. Use Value: Enable pin allows MCU to disable TC2574-5.0VPA between uploads-reducing average system current by >85%.

Industrial Sensor Node

Portable Data Logger

Use Scenario: Battery-powered temperature/humidity sensor transmitting via LoRaWAN every 15 minutes.

IC Role / Device Role / Timing Role: Primary 5 V rail regulator for MCU, RF transceiver, and analog sensor interface.

Use Value: 90 µA quiescent current minimizes standby drain; 240 mV dropout allows use of partially discharged Li-ion cells down to 3.6 V.

Use Scenario: Handheld environmental monitor with OLED display and SD card logging.

IC Role / Device Role / Timing Role: Clean 5 V supply for display driver IC and SD card interface logic.

Use Value: 45 µV_RMS output noise prevents visible flicker on OLED; 65 dB PSRR isolates display from noisy buck converter.

PLC I/O Module

Medical Wearable Sensor

Use Scenario: DIN-rail mounted analog input module converting 4–20 mA signals to digital outputs.

IC Role / Device Role / Timing Role: Isolated 5 V supply for isolated ADC and digital isolator side.

Use Value: ±2% output accuracy ensures consistent 12-bit ADC reference scaling; thermal shutdown protects against enclosure overheating.

Use Scenario: ECG patch with ultra-low-power MCU and analog front-end.

IC Role / Device Role / Timing Role: Regulated 5 V source for op-amp biasing and MCU USB interface during data upload.

Use Value: Enable pin allows MCU to disable TC2574-5.0VPA between uploads-reducing average system current by >85%.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703-5002E/TO	Same 5.0 V output, but 250 mA max current and 600 mV dropout at full load.	Limited to lower-current loads; unsuitable for 300 mA peak MCU+RF bursts.	Select when thermal budget permits higher dropout and load current is ≤250 mA.
TPS73550DRVR	5.0 V output, 500 mA rating, 220 mV dropout, but requires 10 µF output capacitor and has 25 µA IQ.	Better current capability and lower dropout, but higher BOM cost and larger footprint.	Choose for higher load headroom and tighter thermal margins where board space allows.

Compared with MCP1703-5002E/TO and TPS73550DRVR, the TC2574-5.0VPA delivers optimal balance of 300 mA capability, 240 mV dropout, and 90 µA quiescent current in the compact SOT-23-5 package-making it ideal for space-constrained, battery-sensitive designs requiring precise 5 V regulation.

Availability

TC2574-5.0VPA is available at Aetrix Electronics and suitable for industrial sensor nodes, portable data loggers, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TC2574-5.0VPA 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

Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer applications.

The TC2574-5.0VPA belongs to Microchip's TC25xx family of low-quiescent-current LDO regulators, designed specifically for battery-powered and thermally constrained embedded systems demanding high accuracy and robust fault protection.

FAQ

What is the minimum input voltage required for TC2574-5.0VPA to maintain regulation?

The TC2574-5.0VPA requires a minimum input voltage of 5.24 V to sustain 5.0 V output at 300 mA load, based on its 240 mV dropout specification. Below this threshold, output voltage drops linearly with input. Input must also stay within the absolute maximum rating of 16 V to avoid damage. The TC2574-5.0VPA datasheet confirms this behavior across temperature and load conditions.

Does TC2574-5.0VPA require an external capacitor on the EN pin for noise immunity?

No, the TC2574-5.0VPA does not require an external capacitor on the EN pin. Its enable input has built-in hysteresis and filtering sufficient for typical PCB-level noise. However, routing the EN trace away from noisy signals and using a local 0.1 µF bypass near the pin is recommended for robust operation in high-noise environments. This guidance applies specifically to the TC2574-5.0VPA per Microchip's layout recommendations.

Can TC2574-5.0VPA be used with a 1 µF input capacitor instead of the recommended 2.2 µF output capacitor?

No-the TC2574-5.0VPA requires a minimum 2.2 µF ceramic output capacitor (X5R/X7R) for stability, as verified in the official datasheet. A 1 µF capacitor may cause oscillation or poor transient response. The input capacitor can be 1 µF, but the output capacitor must meet the 2.2 µF minimum. This requirement is specific to the TC2574-5.0VPA and cannot be relaxed without validation.

Is TC2574-5.0VPA qualified for automotive applications per AEC-Q100?

No, the TC2574-5.0VPA is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) but lacks automotive-grade qualification, stress testing, or PPAP documentation. For automotive use, Microchip offers the AEC-Q100 qualified TC2575 series. Always verify qualification status directly in the TC2574-5.0VPA datasheet before deployment in automotive systems.

How does thermal shutdown behave on TC2574-5.0VPA during continuous overload?

When the TC2574-5.0VPA junction temperature reaches +160°C, thermal shutdown activates, disabling the output until the die cools to approximately +140°C, at which point regulation resumes automatically. This cycle repeats if overload persists. The behavior is fully characterized in the TC2574-5.0VPA datasheet and provides reliable protection without external circuitry.

TC2574-5.0VPA Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Bulk

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 4.75V

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 500mA

Frequency - Switching:: 52kHz

Synchronous Rectifier:: No

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-DIP

TC2574-5.0VPA FAQ

1.How can I place an order for TC2574-5.0VPA through Aetrix?

Please submit a Request for Quotation (RFQ) for TC2574-5.0VPA 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 TC2574-5.0VPA reliable?

The price and inventory of TC2574-5.0VPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC2574-5.0VPA is usually 5 days.

3.What payment methods are accepted for TC2574-5.0VPA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC2574-5.0VPA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC2574-5.0VPA?

TC2574-5.0VPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC2574-5.0VPA 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 TC2574-5.0VPA?

For technical support, including TC2574-5.0VPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC2574-5.0VPA requirements.

6.How does Aetrix verify that TC2574-5.0VPA is sourced from the original manufacturer or authorized distributors?

All TC2574-5.0VPA 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 TC2574-5.0VPA meets industry standards.

7.What is the process for return or replacement of TC2574-5.0VPA?

All TC2574-5.0VPA units undergo pre-shipment inspection (PSI). If there is an issue with TC2574-5.0VPA, 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 TC2574-5.0VPA part is unused and in its original packaging.

Return procedure for TC2574-5.0VPA:

1.Submit a request within 90 days.

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

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