Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated ZXCL280E5TA

Name: ZXCL280E5TA
Brand: Diodes Incorporated
SKU: ZXCL280E5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZXCL280E5TA

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: ZXCL280E5TA.pdf

Description:: IC REG LINEAR 2.8V 150MA SOT23-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,243

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZXCL280E5TA from Diodes Incorporated is a 2.8V fixed-output, micropower low-dropout linear regulator in SOT25 (5-pin) 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 ZXCL280E5TA datasheet, ZXCL280E5TA pinout, ZXCL280E5TA application, or ZXCL280E5TA equivalent, key selection criteria include dropout voltage under 100mA load, shutdown current <1µA, thermal shutdown at 125°C, output noise <50µVRMS (10Hz–100kHz), and compatibility with 1µF ceramic output capacitors without external bypass.

Technical Context

The ZXCL280E5TA uses a PMOS pass transistor architecture enabling low dropout and near-constant ground current across load and input voltage ranges. Its internal bandgap reference and error amplifier maintain ±3% output voltage accuracy over temperature and line/load variations.

It integrates TTL/CMOS-compatible enable logic with 150mV hysteresis, thermal shutdown activation at 125°C, and current limiting with typical trip at 230mA. The device operates stably with 1µF ceramic output capacitors and exhibits 70dB PSRR at 1kHz with 2.2µF output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±3% - ensures stable bias for 2.8V logic rails and analog sensors without external feedback.
Dropout Voltage	85mV at 50mA - enables operation with VIN as low as 2.885V, critical for single-cell Li-ion or alkaline systems.
Ground Current	50µA at 150mA load - minimizes total system quiescent power, extending battery life in always-on monitoring circuits.
Shutdown Current	1µA max - reduces standby leakage to negligible levels during host-controlled sleep modes.
PSRR	70dB @ 1kHz (with 2.2µF CO) - suppresses switching noise from upstream DC/DC converters feeding the LDO input.
Thermal Shutdown	125°C junction - protects against sustained overload or poor PCB thermal design without external circuitry.
Enable Threshold	V_ENH = 2.2V min, V_ENL = 0.8V max - compatible with 3.3V and 2.5V logic families without level-shifting.

Pinout & Package

SOT25 (5-pin) package: 2.8mm × 2.9mm × 1.45mm body, gull-wing leads, JEDEC standard footprint. Thermal pad not present; θ_JA ≈ 180–300°C/W depending on PCB copper area.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input supply	Accepts 2.0V–5.5V; must exceed VOUT + 0.5V for regulation; internal reverse-blocking diode anode tied to VO.
GND	Power ground	Reference node for all internal circuitry; low-impedance return path required for noise-sensitive applications.
EN	Enable control	Active-HIGH TTL/CMOS input; drives internal bias circuits; 150mV hysteresis prevents chatter during slow-rising signals.
N/C	No connection	Pin 2 in SOT25 - electrically isolated; must not be bonded or connected to any net per datasheet instruction.
VO	Regulated output	Delivers 2.8V ±3%; stable with ≥1µF ceramic capacitor; supports no-load CMOS RAM retention without oscillation.

Key Features

Feature	Design Value
Ultra-low dropout	85mV at 50mA enables use in single-cell battery systems where headroom is constrained.
No-load stability	Regulates stably with zero output load - essential for backup power to SRAM or real-time clocks.
Low-noise operation	50µVRMS output noise (10Hz–100kHz) without bypass capacitor - simplifies layout for RF/analog sections.
Robust protection	Integrated thermal shutdown and current limit (160–800mA range) prevent damage during fault conditions.
Logic-compatible enable	EN pin accepts 0–10V drive; no clamp diode to VIN allows independent voltage domain control.

Applications

Portable Medical Sensors

Wireless Sensor Nodes

Use Scenario: Powering ultra-low-power pulse oximeter front-end ICs operating intermittently from coin-cell batteries.

IC Role / Device Role / Timing Role: Primary voltage regulator supplying 2.8V to ADC, op-amps, and optical drivers during active measurement bursts.

Use Value: 50µA ground current extends 10-year battery life; 85mV dropout preserves usable voltage down to 2.885V under load.

Use Scenario: Supplying 2.8V to BLE SoC and environmental sensor ICs in battery-operated industrial IoT nodes.

IC Role / Device Role / Timing Role: System LDO enabling deep-sleep mode via EN pin control; powers entire subsystem except RF transceiver.

Use Value: 1µA shutdown current eliminates parasitic drain; no-load stability maintains RTC and wake-up timer during sleep.

Handheld Test Instruments

PC Card Peripherals

Use Scenario: Providing clean 2.8V rail to precision DACs and reference buffers in portable multimeters.

IC Role / Device Role / Timing Role: Low-noise post-regulator after main DC/DC converter; decouples digital switching noise from analog signal chain.

Use Value: 70dB PSRR at 1kHz and 50µVRMS noise ensure <0.01% measurement accuracy without added filtering.

Use Scenario: Regulating 2.8V for PCMCIA/CardBus interface logic and flash memory controllers in legacy laptop expansion cards.

IC Role / Device Role / Timing Role: Fixed-output LDO meeting JEDEC SOT25 footprint requirements for space-constrained card edge designs.

Use Value: Industry-standard pinout (VIN-GND-EN-N/C-VO) enables drop-in replacement; 3000-unit tape-and-reel packaging supports automated assembly.

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-2.8TRG1	2.8V output, 150mA I_OUT, 120mV dropout @ 150mA, 65µA I_GND, SOT-25 package	Higher dropout and ground current; lacks N/C pin - pin 2 is GND instead of no-connect	Choose when higher output current margin is needed and board layout allows GND on pin 2.
AP7115-28SEG-7	2.8V output, 300mA I_OUT, 250mV dropout @ 150mA, 120µA I_GND, SOT-25 package	Higher current capability but significantly higher dropout and quiescent current; no EN pin	Choose only if enable functionality is unnecessary and >200mA continuous load is required.

Compared with ZXCL280E5TA, AP2121AK-2.8TRG1 trades lower dropout for slightly higher ground current and different pin 2 function, while AP7115-28SEG-7 sacrifices enable control and efficiency for higher output current - making ZXCL280E5TA optimal for ultra-low-power, logic-controlled applications.

Availability

ZXCL280E5TA is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, handheld test instruments, and PC Card peripherals requiring stable component supply with long-term lifecycle support.

Supply support for ZXCL280E5TA 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 was designed specifically for space-constrained, battery-powered systems demanding micropower operation, ultra-small packaging (SC70-5/SOT25), and robust performance without external compensation components.

FAQ

What is the minimum input voltage required for regulation at full 150mA load?

The datasheet specifies that for normal operation, VIN(min) must exceed VOUT(nom) + 0.5V. With a nominal 2.8V output, the minimum valid input is 3.3V. At lower inputs (e.g., 3.0V), the device enters dropout - maintaining regulation but with reduced headroom and increased sensitivity to load transients.

Can the N/C pin (Pin 2) be grounded or left floating in the SOT25 package?

Pin 2 in the SOT25 variant is explicitly designated "N/C" (no connection) and must remain unconnected - neither grounded nor tied to any other net. The datasheet states it should be left open-circuit; connecting it risks undefined behavior or degraded performance due to internal isolation design.

Does ZXCL280E5TA require an input capacitor, and what value is recommended?

Yes - a 1µF ceramic or tantalum input capacitor is recommended to filter supply noise and improve ripple rejection. Placement must be within 2mm of VIN and GND pins. X7R dielectric is preferred for stable capacitance across –40°C to +85°C; Y5V types are discouraged due to severe capacitance loss at temperature extremes.

How does thermal shutdown behave during sustained overload?

When junction temperature exceeds 125°C, the device shuts down completely - halting output conduction and reducing supply current to ~1µA. It remains latched off until the die cools below the hysteresis threshold (~110°C), then automatically resumes regulation. This cycling continues until the overload condition is removed.

ZXCL280E5TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.28V @ 100mA

Current - Output:: 150mA

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

ZXCL280E5TA FAQ

1.How can I place an order for ZXCL280E5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCL280E5TA 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 ZXCL280E5TA reliable?

The price and inventory of ZXCL280E5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCL280E5TA is usually 5 days.

3.What payment methods are accepted for ZXCL280E5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCL280E5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCL280E5TA?

ZXCL280E5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCL280E5TA 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 ZXCL280E5TA?

For technical support, including ZXCL280E5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCL280E5TA requirements.

6.How does Aetrix verify that ZXCL280E5TA is sourced from the original manufacturer or authorized distributors?

All ZXCL280E5TA 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 ZXCL280E5TA meets industry standards.

7.What is the process for return or replacement of ZXCL280E5TA?

All ZXCL280E5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCL280E5TA, 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 ZXCL280E5TA part is unused and in its original packaging.

Return procedure for ZXCL280E5TA:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.