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

Diodes Incorporated ZMR250F02TA

Name: ZMR250F02TA
Brand: Diodes Incorporated
SKU: ZMR250F02TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZMR250F02TA

Manufacturer:: Diodes Incorporated

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

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZMR250F02TA.pdf

Description:: IC REG LINEAR 2.5V 50MA SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:1,629

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Product details

Overview

ZMR250F02TA from Zetex Semiconductors is a fixed 2.5 V low-dropout linear voltage regulator in SOT23 package, delivering up to 50 mA output current with only 30 µA quiescent current and 22.5 V maximum input voltage. It features internal short-circuit current limiting, thermal shutdown, and unconditional stability with no external capacitor required.

For engineers reviewing the ZMR250F02TA datasheet, ZMR250F02TA pinout, ZMR250F02TA application, or ZMR250F02TA equivalent, this device is selected for ultra-low-power battery-powered systems requiring stable 2.5 V biasing for precision analog sensors, microcontroller I/O rails, and portable instrumentation where supply current and dropout voltage are critical.

Technical Context

The ZMR250F02TA operates as a three-terminal shunt-regulated series pass device with an internal bandgap reference and PNP pass transistor. Its regulation loop maintains output voltage within ±2.4% over –55°C to +125°C and load currents from 0 to 50 mA.

It achieves 55–75 dB ripple rejection at 120 Hz across its 4.2–22.5 V input range and delivers 65 µV_rms output noise (10 Hz–10 kHz), enabling use in noise-sensitive signal chains without additional filtering.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±2.5% (2.36–2.64 V over full temp/load range)
Max Input Voltage	22.5 V - supports wide-input industrial/battery systems
Output Current	50 mA - sufficient for sensor biasing and MCU core/I/O rails
Quiescent Current	30 µA typical - enables >10-year battery life in 10 µA sleep-mode systems
Dropout Voltage	Typ. 0.4 V at 50 mA - allows operation down to 2.9 V input for 2.5 V output
Ripple Rejection	55–75 dB at 120 Hz - suppresses AC line-derived noise in mixed-signal designs
Output Noise	65 µV_rms (10 Hz–10 kHz) - suitable for ADC reference buffers and op-amp supplies

Pinout & Package

SOT23-3 surface-mount package (JEDEC TO-236AB), 2.8–3.04 mm length × 2.1–2.64 mm width × 1.12 mm max height, with gull-wing leads on 0.95 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input supply connection	Accepts 4.2–22.5 V unregulated DC; must be decoupled locally
2 (GND)	Ground reference terminal	Common return for load and regulator feedback; connects to PCB ground plane
3 (OUT)	Regulated output terminal	Delivers stable 2.5 V to load; no external capacitor required for stability

Key Features

Feature	Design Value
Unconditionally stable	No external output capacitor needed - reduces BOM count and board space in space-constrained designs
Internal thermal shutdown	Automatically disables output above safe junction temperature - eliminates need for external thermal protection circuitry
Internal short-circuit current limit	Clamps output current to safe level during fault - protects both regulator and downstream circuitry
Low temperature coefficient	0.275–0.7 mV/°C - ensures <±15 mV drift over –55°C to +125°C operating range

Applications

Portable Gas Sensor Modules

Industrial RTD Signal Conditioning

Use Scenario: Battery-powered handheld gas detectors using electrochemical or NDIR sensors requiring precise 2.5 V reference and analog front-end bias.

IC Role / Device Role / Timing Role: Primary voltage reference and analog supply rail regulator.

Use Value: 30 µA quiescent current extends AA/AAA battery life to >5 years in intermittent-read mode; 65 µV_rms noise avoids ADC quantization errors.

Use Scenario: 4–20 mA loop-powered temperature transmitters with platinum RTD bridges and low-noise instrumentation amplifiers.

IC Role / Device Role / Timing Role: Stable excitation voltage source and op-amp supply regulator.

Use Value: 2.5 V output matches standard 10-bit ADC full-scale range; 55–75 dB ripple rejection prevents 50/60 Hz interference coupling into bridge measurements.

Medical Wearable ECG Front-Ends

Smart Meter Analog Acquisition Units

Use Scenario: Ultra-low-power wearable ECG patches with single-cell Li-ion or coin-cell batteries powering analog signal chain and BLE SoC.

IC Role / Device Role / Timing Role: Low-noise analog supply for instrumentation amplifiers and ADC drivers.

Use Value: Dropout voltage ≤0.4 V enables operation down to 2.9 V battery voltage while maintaining 2.5 V rail; no external capacitor simplifies layout near sensitive analog traces.

Use Scenario: Three-phase smart meters with isolated power supplies feeding metrology ICs and anti-tamper monitoring circuits.

IC Role / Device Role / Timing Role: Secondary regulated rail for metrology ADC reference and precision op-amps.

Use Value: 22.5 V max input accommodates wide-range auxiliary supply (e.g., 12–20 V derived from mains); ±2.5% tolerance meets IEC 62053-21 Class 0.2 accuracy requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2502E/TT	3.8 µA quiescent current, 250 mA output, 6 V max input	Lower IQ but narrower input range - unsuitable for >6 V industrial inputs	Select when battery life dominates and input stays below 6 V
TLV70725PDQNR	25 µA IQ, 300 mA output, 5.5 V max input, 170 mV dropout @ 300 mA	Higher current capability but incompatible with >5.5 V inputs or high-temp industrial environments	Select for higher-load consumer applications with tight space constraints

Compared with MCP1700T-2502E/TT and TLV70725PDQNR, the ZMR250F02TA uniquely balances ultra-low IQ (30 µA), wide 22.5 V input range, and industrial temperature support (–55°C to +125°C) - making it irreplaceable in long-life, high-voltage, low-power embedded systems where alternatives fail on at least one key dimension.

Availability

ZMR250F02TA is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, smart metering hardware, and battery-backed data loggers requiring stable component supply under extended temperature and long-lifecycle conditions.

Supply support for ZMR250F02TA 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

Zetex Semiconductors plc was a UK-based ISO 9001 and TS16949-certified analog semiconductor manufacturer specializing in high-reliability discrete and linear ICs before its acquisition by Diodes Incorporated in 2008.

The ZMR series was designed specifically for ultra-low-power, wide-input-voltage linear regulation in space-constrained industrial and portable equipment - prioritizing quiescent current, thermal robustness, and capacitor-free stability over raw output current.

FAQ

Is ZMR250F02TA stable without an output capacitor?

Yes. The ZMR250F02TA is unconditionally stable per its datasheet and requires no external output capacitor for stability - a key differentiator from most LDOs. This eliminates capacitor-related aging, leakage, and PCB area concerns in long-life designs. Its internal compensation is optimized for direct capacitive loading up to 10 µF, though none is needed.

What is the minimum input voltage required for regulation at 2.5 V output?

The ZMR250F02TA requires a minimum input voltage of 3.9 V to maintain regulation at 2.5 V output, as specified in the "Input voltage required to maintain regulation" parameter. Below this, output voltage drops linearly with input; dropout voltage is typically 0.4 V at 50 mA, meaning ≥2.9 V input sustains regulation under full load.

Can ZMR250F02TA operate at –55°C?

Yes. The device is fully characterized and guaranteed over –55°C to +125°C ambient temperature, with output voltage tolerance maintained at ±2.4% across the full range. Electrical parameters including quiescent current (30–40 µA), line/load regulation, and ripple rejection are all specified at temperature extremes, not just at 25°C.

How does ZMR250F02TA handle thermal overload?

It features internal thermal shutdown that disables the output pass transistor when junction temperature exceeds safe limits (typically ~150°C). Once the die cools sufficiently, regulation automatically resumes - no latch-up or manual reset required. This protection is active across the full –55°C to +125°C operating range and complements its internal short-circuit current limit.

ZMR250F02TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 22.5V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 50mA

Current - Quiescent (Iq):: 40 µA

Current - Supply (Max):: -

PSRR:: 75dB (120Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZMR250F02TA FAQ

1.How can I place an order for ZMR250F02TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMR250F02TA 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 ZMR250F02TA reliable?

The price and inventory of ZMR250F02TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR250F02TA is usually 5 days.

3.What payment methods are accepted for ZMR250F02TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR250F02TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMR250F02TA?

ZMR250F02TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMR250F02TA 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 ZMR250F02TA?

For technical support, including ZMR250F02TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR250F02TA requirements.

6.How does Aetrix verify that ZMR250F02TA is sourced from the original manufacturer or authorized distributors?

All ZMR250F02TA 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 ZMR250F02TA meets industry standards.

7.What is the process for return or replacement of ZMR250F02TA?

All ZMR250F02TA units undergo pre-shipment inspection (PSI). If there is an issue with ZMR250F02TA, 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 ZMR250F02TA part is unused and in its original packaging.

Return procedure for ZMR250F02TA:

1.Submit a request within 90 days.

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

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