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

Diodes Incorporated ZMR250F02TC

Name: ZMR250F02TC
Brand: Diodes Incorporated
SKU: ZMR250F02TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZMR250F02TC

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: ZMR250F02TC.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:2,558

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Product details

Overview

ZMR250F02TC from Zetex Semiconductors is a fixed 2.5 V positive voltage regulator in SOT23 package, featuring 30 µA quiescent current, 50 mA output capability, and input voltage range of 4.2–22.5 V. It integrates internal current limiting and thermal shutdown, enabling robust operation in space-constrained low-power systems such as sensor nodes and portable instrumentation.

For engineers reviewing the ZMR250F02TC datasheet, ZMR250F02TC pinout, ZMR250F02TC application, or ZMR250F02TC equivalent, key selection criteria include dropout behavior at 50 mA, temperature coefficient (0.275–0.700 mV/°C), ripple rejection (55–75 dB at 120 Hz), and stability without external capacitors.

Technical Context

The ZMR250F02TC implements a bandgap-referenced shunt-regulated series pass architecture with unconditionally stable operation-no external compensation required. Its thermal shutdown activates at junction temperatures exceeding safe limits, and internal current limit prevents damage during sustained overload.

Designed for minimal board footprint, it operates across –55°C to +125°C ambient, with output voltage tolerance of ±2.5% over full load and temperature range (2.360–2.640 V), and maintains regulation down to 3.9 V input at nominal output.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	2.5 V ±2.5% (2.360–2.640 V) over –55°C to +125°C and 0–50 mA load
Quiescent current	30 µA typical at 25°C - enables >1-year battery life in 10 µA sleep-mode systems
Input voltage range	4.2 V to 22.5 V - supports wide-input industrial rails and legacy 12 V/24 V systems
Max output current	50 mA continuous - sufficient for powering microcontrollers, ADCs, and analog sensors
Ripple rejection	55–75 dB at 120 Hz - suppresses line-frequency noise in AC-DC derived supplies
Dropout voltage	Typically 0.4 V at 50 mA - allows regulation from 2.9 V input while delivering 2.5 V output
Temp coefficient	0.275–0.700 mV/°C - ensures <±12 mV drift over full operating temperature range

Pinout & Package

SOT23-3 surface-mount package (JEDEC TO-236AB), 2.80–3.04 mm × 2.10–2.64 mm × 1.12 mm max height, 8 mm tape width, 3000 units per 7-inch reel.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input supply connection	Accepts 4.2–22.5 V DC; must be decoupled locally to ensure transient stability
2 (GND)	Ground reference	Common return for load and regulator bias; requires low-impedance PCB connection
3 (OUT)	Regulated output	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 PCB area in ultra-compact designs
Thermal shutdown protection	Automatically disables output above safe junction temperature - eliminates need for external thermal monitoring
Internal short-circuit current limit	Clamps output current to prevent damage during wiring faults or load shorts
Low-noise operation	65 µV_rms output noise (10 Hz–10 kHz) - suitable for precision analog front-ends and reference supplies

Applications

Industrial Sensor Transmitters

Portable Medical Monitors

Use Scenario: Powering 4–20 mA loop-powered temperature and pressure transmitters in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary 2.5 V reference and analog signal chain supply regulator.

Use Value: 30 µA quiescent current extends loop compliance margin; ±2.5% output tolerance meets IEC 61000-4 immunity requirements.

Use Scenario: Supplying ADC reference and microcontroller core voltage in handheld ECG and pulse oximeter devices.

IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO for analog signal conditioning and digital logic rail.

Use Value: 65 µV_rms noise avoids degradation of 16-bit ADC ENOB; SOT23 footprint fits tight wearable form factors.

Smart Utility Metering

IoT Edge Node Controllers

Use Scenario: Regulating power for metrology ASICs and real-time clocks in ANSI C12.20-compliant electricity meters.

IC Role / Device Role / Timing Role: Precision 2.5 V supply for energy measurement reference and RTC backup.

Use Value: 0.275–0.700 mV/°C tempco ensures <±12 mV drift over –40°C to +85°C meter operating range.

Use Scenario: Providing regulated 2.5 V to LoRaWAN or NB-IoT modem ICs and environmental sensors in battery-operated gateways.

IC Role / Device Role / Timing Role: Primary system regulator enabling deep-sleep current optimization.

Use Value: 30 µA IQ allows multi-year operation on CR2032 cells; 22.5 V max input accommodates solar-charged LiFePO₄ stacks.

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 (Microchip)	2.5 V output, 250 mA rating, 1.6 µA IQ, but requires 1 µF ceramic output capacitor for stability	Higher output current supports more complex SoCs; lower IQ benefits ultra-low-power wake-on-radio use cases	Select when >50 mA load or sub-µA sleep current is required; verify capacitor placement for transient response
TLV70025DDCT (TI)	2.5 V output, 200 mA rating, 35 µA IQ, 170 mV dropout at 200 mA, requires 0.1 µF min output capacitance	Better PSRR (60 dB @ 1 kHz) and lower dropout suit higher-performance analog systems	Choose for improved ripple rejection in noisy environments or when driving heavier loads with tighter headroom

Compared with MCP1700T-2502E/TT and TLV70025DDCT, the ZMR250F02TC offers proven capacitor-free stability and ruggedized thermal/current protection in a legacy-qualified SOT23 footprint-ideal for cost-sensitive, long-lifecycle industrial designs where design-in simplicity and field reliability outweigh peak performance metrics.

Availability

ZMR250F02TC is available at Aetrix Electronics and suitable for industrial sensor transmitters, portable medical monitors, and smart utility metering requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ZMR250F02TC 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 (now part of Diodes Incorporated) was a UK-based ISO 9001/TS16949-certified designer of high-reliability analog and discrete semiconductors for industrial and automotive markets.

The ZMR series was developed specifically for space-constrained, low-power linear regulation in harsh-environment applications-emphasizing intrinsic protection, minimal external components, and extended temperature operation.

FAQ

Is ZMR250F02TC compatible with lead-free reflow soldering processes?

Yes. The ZMR250F02TC uses standard SOT23-3 packaging qualified for Pb-free reflow per JEDEC J-STD-020 Rev. E, with peak temperature tolerance up to 260°C for 10 seconds. Its matte tin plating ensures reliable wetting and intermetallic formation without voiding or dewetting risks.

Does ZMR250F02TC require an input bypass capacitor?

While not strictly required for stability, a 1 µF X5R ceramic capacitor placed within 2 mm of the IN pin significantly improves line transient response and reduces high-frequency input noise coupling. This is recommended for systems powered from switching regulators or long PCB traces.

What is the minimum load current needed for regulation accuracy?

No minimum load is specified-the ZMR250F02TC maintains 2.5 V output regulation from 0 mA to 50 mA. Output voltage remains within ±2.5% tolerance even at zero load, verified across –55°C to +125°C and full input voltage range.

Can ZMR250F02TC be used in battery-powered applications with 3.0 V nominal input?

No. The minimum input voltage to maintain 2.5 V regulation is 3.9 V per datasheet specification. At 3.0 V input, the device enters dropout and cannot sustain regulated output; consider a 2.5 V LDO with ≤300 mV dropout if 3.0 V battery operation is required.

ZMR250F02TC 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

ZMR250F02TC FAQ

1.How can I place an order for ZMR250F02TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMR250F02TC 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 ZMR250F02TC reliable?

The price and inventory of ZMR250F02TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR250F02TC is usually 5 days.

3.What payment methods are accepted for ZMR250F02TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR250F02TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMR250F02TC?

ZMR250F02TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMR250F02TC 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 ZMR250F02TC?

For technical support, including ZMR250F02TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR250F02TC requirements.

6.How does Aetrix verify that ZMR250F02TC is sourced from the original manufacturer or authorized distributors?

All ZMR250F02TC 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 ZMR250F02TC meets industry standards.

7.What is the process for return or replacement of ZMR250F02TC?

All ZMR250F02TC units undergo pre-shipment inspection (PSI). If there is an issue with ZMR250F02TC, 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 ZMR250F02TC part is unused and in its original packaging.

Return procedure for ZMR250F02TC:

1.Submit a request within 90 days.

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

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