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

Diodes Incorporated ZXCL250E5TA

Name: ZXCL250E5TA
Brand: Diodes Incorporated
SKU: ZXCL250E5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCL250E5TA

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: ZXCL250E5TA.pdf

Description:: IC REG LINEAR 2.5V 100MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:3,780

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Product details

Overview

ZXCL250E5TA from Diodes Incorporated is a 2.5V fixed-output, low-dropout linear regulator in SOT25 (5-pin SOT-23) package, featuring 85mV dropout at 50mA, 50µA ground current at 150mA load, and active-high enable control. It delivers stable regulation for battery-powered portable electronics requiring ultra-low quiescent current and no-load stability.

For engineers reviewing the ZXCL250E5TA datasheet, ZXCL250E5TA pinout, ZXCL250E5TA application, or ZXCL250E5TA equivalent, key selection criteria include dropout voltage under 100mA load, shutdown current <1µA, thermal shutdown at 125°C, and compatibility with 1µF ceramic output capacitors without external compensation.

Technical Context

The ZXCL250E5TA integrates a PMOS pass transistor enabling low dropout and near-constant ground current across load and input voltage ranges. Its bandgap reference and error amplifier deliver ±3% output voltage accuracy over temperature and line/load variations.

Enable logic is TTL/CMOS-compatible with 2.2V–10V high threshold and 0–0.8V low threshold; internal hysteresis prevents chatter during enable transitions. Thermal shutdown activates at 125°C and cycles until overload removal, while current limiting operates between 160mA and 800mA depending on conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5V ±3% - tightly regulated for 2.5V logic rails and analog subsystems
Dropout Voltage	85mV at 50mA - enables operation with VIN as low as 2.585V while maintaining regulation
Ground Current	50µA at 150mA load - minimizes total system power draw in high-current battery modes
Shutdown Current	1µA max - ensures negligible battery drain during deep sleep or standby states
Enable Threshold	V_ENH ≥2.2V, V_ENL ≤0.8V - compatible with standard 3.3V/5V GPIO without level shifting
Thermal Shutdown	125°C activation - protects against sustained overloads in compact PCB layouts
Output Capacitor	Stable with ≥1µF ceramic (X7R dielectric) - eliminates need for tantalum or electrolytic capacitors

Pinout & Package

SOT25 (5-pin SOT-23) package with industry-standard footprint and 1.6mm × 2.9mm body size; optimized for high-density portable PCBs and compatible with automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input supply connection	Accepts 2.0V–5.5V; internal diode anode tied to VO limits reverse current to 5mA continuous
GND	Power ground reference	Low-impedance return path for load and bias currents; critical for noise and PSRR performance
EN	Active-high enable input	Drives internal bias circuitry; no clamp diode to VIN allows independent voltage sequencing
N/C	No connection	Pin 2 in SOT25 - must be left unconnected per datasheet; not internally bonded
VO	Regulated output	Delivers 2.5V ±3%; supports no-load stability and fast transient response with 1µF ceramic cap

Key Features

Feature	Design Value
Ultra-low dropout	85mV at 50mA enables >95% efficiency in 2.5V systems powered from single Li-ion cells
Micro-power ground current	50µA at full 150mA load reduces total system quiescent consumption below 100µA in typical use
No-load stability	Maintains regulation with zero output load - essential for CMOS RAM backup and always-on monitoring circuits
Low-noise operation	50µV_RMS (10Hz–100kHz) without bypass capacitor simplifies layout for sensitive analog sensors
Robust protection	Integrated thermal shutdown and current limit tolerate indefinite short-circuit to GND or VOUT

Applications

Cellular Handsets

Portable Medical Sensors

Use Scenario: Powering baseband processor I/O banks and RF front-end bias rails in slim smartphone designs.

IC Role / Device Role / Timing Role: Primary LDO supplying 2.5V core logic; enables clean power sequencing via EN pin during boot and sleep transitions.

Use Value: 85mV dropout extends usable battery life by maintaining regulation down to 2.585V input, delaying brown-out shutdown.

Use Scenario: Regulating power for low-power ECG amplifiers and ADC reference supplies in wearable patch monitors.

IC Role / Device Role / Timing Role: Low-noise, no-load-stable LDO delivering 2.5V to precision analog signal chain components.

Use Value: 50µV_RMS output noise and ±3% accuracy ensure sub-12-bit measurement integrity without external filtering.

Handheld Test Instruments

IoT Edge Node Controllers

Use Scenario: Supplying 2.5V to microcontroller ADC references and op-amp signal conditioning stages in battery-operated DMMs.

IC Role / Device Role / Timing Role: Precision voltage source with tight line/load regulation (0.02%/V, 0.01%/mA) for metrology-grade accuracy.

Use Value: <0.04% load regulation ensures consistent ADC reference voltage across 1mA–100mA sensor excitation loads.

Use Scenario: Powering ultra-low-power MCU cores and BLE radio peripherals in coin-cell–powered environmental sensors.

IC Role / Device Role / Timing Role: Enable-controlled LDO providing 2.5V only during active sensing bursts; shuts down between readings.

Use Value: 1µA shutdown current extends 220mAh CR2032 battery life beyond 10 years in 1-minute wake-up intervals.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2121AK-2.5TRG1	Same 2.5V output, 150mA rating, but uses NMOS pass device; 250mV dropout at 150mA vs. ZXCL250E5TA's 325mV	Higher ground current (120µA vs. 50µA at 150mA); less suitable for multi-year battery life targets	Select when board space permits larger output caps and higher dropout is acceptable for cost-sensitive designs
AP7115-25SEG-7	2.5V output, 300mA rating, built-in soft-start; 120mV dropout at 100mA; requires 2.2µF min output cap	Higher PSRR (65dB @ 1kHz vs. 50dB), but lacks no-load stability guarantee and has fixed 1.2ms startup delay	Select when improved ripple rejection is critical and load always exceeds 1mA; avoid for RAM backup or intermittent-sense use

Compared with AP2121AK-2.5TRG1 and AP7115-25SEG-7, ZXCL250E5TA uniquely combines no-load stability, 50µA ground current, and 85mV dropout-making it irreplaceable for long-life, zero-load, or ultra-low-voltage battery systems where those three parameters are simultaneously constrained.

Availability

ZXCL250E5TA is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, handheld test instruments, and IoT edge node controllers requiring stable component supply across extended production lifecycles.

Supply support for ZXCL250E5TA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The ZXCL series belongs to Diodes' micropower LDO portfolio, designed specifically for space-constrained, battery-powered portable electronics where ultra-low quiescent current, no-load stability, and minimal external components are mandatory.

FAQ

What is the minimum input voltage required for ZXCL250E5TA to regulate 2.5V output?

The datasheet specifies VIN(min) > VOUT(nom) + 0.5V for normal operation, so minimum input is 3.0V. However, regulation begins when VIN exceeds ~1.3V, and the device maintains output down to 2.585V input (2.5V + 85mV dropout) at 50mA load. Below that, output drops linearly with input.

Can ZXCL250E5TA operate without an output capacitor?

No. While the device is stable with no load, an output capacitor ≥1µF (ceramic, X7R dielectric) is mandatory for stability across all operating conditions. Omitting it causes oscillation and loss of regulation, especially under dynamic load changes or at temperature extremes.

Is the N/C pin on ZXCL250E5TA electrically isolated or internally connected?

Pin 2 in the SOT25 package is designated N/C and is not internally bonded - it is electrically isolated and must remain unconnected. The datasheet explicitly states "No Connection" and warns against tying it to any potential, including GND or VIN, to avoid unintended leakage paths.

Does ZXCL250E5TA support reverse current protection?

It provides limited reverse current protection via an inherent body diode (anode at VO, cathode at VIN). This diode conducts if VO exceeds VIN by >0.6V, allowing up to 5mA continuous reverse current. For robust reverse polarity or back-drive protection, an external Schottky diode is required per the datasheet application note.

ZXCL250E5TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

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

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.325V @ 100mA

Current - Output:: 100mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: 120 µA

PSRR:: -

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

ZXCL250E5TA FAQ

1.How can I place an order for ZXCL250E5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCL250E5TA 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 ZXCL250E5TA reliable?

The price and inventory of ZXCL250E5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCL250E5TA is usually 5 days.

3.What payment methods are accepted for ZXCL250E5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCL250E5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCL250E5TA?

ZXCL250E5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCL250E5TA 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 ZXCL250E5TA?

For technical support, including ZXCL250E5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCL250E5TA requirements.

6.How does Aetrix verify that ZXCL250E5TA is sourced from the original manufacturer or authorized distributors?

All ZXCL250E5TA 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 ZXCL250E5TA meets industry standards.

7.What is the process for return or replacement of ZXCL250E5TA?

All ZXCL250E5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCL250E5TA, 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 ZXCL250E5TA part is unused and in its original packaging.

Return procedure for ZXCL250E5TA:

1.Submit a request within 90 days.

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

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