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

Diodes Incorporated AP2210N-4.0TRG1

Name: AP2210N-4.0TRG1
Brand: Diodes Incorporated
SKU: AP2210N-4.0TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2210N-4.0TRG1

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP2210N-4.0TRG1.pdf

Description:: IC REG LINEAR 4V 300MA SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,861

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Product details

Overview

AP2210N-4.0TRG1 from Diodes Incorporated is a 300mA ultra-low dropout (ULDO) linear regulator with fixed 4.0V output, 250mV typical dropout at full load, ±1% output voltage accuracy, and 75dB PSRR at 100Hz. It delivers low-noise power for RF front-end circuits and battery-powered portable electronics requiring stable, clean supply rails.

For engineers reviewing the AP2210N-4.0TRG1 datasheet, AP2210N-4.0TRG1 pinout, AP2210N-4.0TRG1 application, or AP2210N-4.0TRG1 equivalent, this device is selected for noise-sensitive analog/RF subsystems where input-to-output headroom is constrained, standby current must be <1µA, and thermal protection and reverse-current blocking are required.

Technical Context

The AP2210N-4.0TRG1 uses a PNP pass transistor architecture enabling ultra-low dropout and high PSRR across low-frequency ripple. Its internal bandgap reference and error amplifier maintain tight line/load regulation (<6mV) over -40°C to +125°C junction temperature.

It integrates CMOS/TTL-compatible enable control, thermal shutdown, overcurrent limiting (450–900mA), and reverse-current protection-no external diode needed. The BYP pin supports 100pF bypass capacitor for noise reduction in RF applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 4.0V ±1% - ensures precise biasing of 4V-tolerant RF ICs and analog sensors without external feedback.
Dropout Voltage	250mV typ. at 300mA - enables operation from 4.25V input (e.g., single Li-ion cell post-regulation) while sustaining full load.
PSRR	75dB at 100Hz - suppresses switching noise from upstream DC-DC converters feeding sensitive RF receivers.
Standby Current	1µA max. - extends battery life in always-on wireless sensor nodes during deep-sleep modes.
Output Noise	260nV/√Hz - meets low-phase-noise requirements for VCOs, LNAs, and ADC reference supplies.
Thermal Protection	Internally limited junction temperature (150°C) - prevents latch-up during transient overload or poor PCB heatsinking.
Enable Threshold	VIH = 2.0V min., VIL = 0.4V max. - compatible with 1.8V/3.3V logic without level-shifting in mixed-voltage systems.

Pinout & Package

SOT-23-5 package: compact 2.9mm × 1.6mm surface-mount footprint with exposed pad for thermal performance; matte tin-plated leads, RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
1 (VIN)	Input supply connection	Accepts 4.25V–13.2V input; requires 1.0µF ceramic decoupling close to pin for stability.
2 (GND)	Ground reference	Low-impedance return path for load and regulator quiescent current; connects to PCB ground plane.
3 (EN)	Logic-enable control	Active-high shutdown: drives low to reduce I_STD to ≤1µA; compatible with MCU GPIOs.
4 (BYP/ADJ)	Noise filter / adjust node	Connect 100pF capacitor to GND to reduce output noise; not used in fixed 4.0V version.
5 (VOUT)	Regulated output	Delivers up to 300mA at 4.0V ±1%; requires 2.2µF ceramic output capacitor for PSRR and transient response.

Key Features

Feature	Design Value
Ultra-Low Dropout	250mV at 300mA enables use with minimal input headroom-critical for single-cell Li-ion systems.
High PSRR (75dB @ 100Hz)	Rejects low-frequency ripple from buck converters, preserving signal integrity in RF transceivers.
Reverse Current Protection	Blocks backflow from VOUT to VIN when input is removed-eliminates need for external blocking diode.
±1% Output Accuracy	Guarantees consistent biasing of precision analog circuitry without calibration or trimming.
Thermal + Overcurrent Protection	Auto-recovery shutdown prevents damage during short-circuit or high-ambient thermal conditions.

Applications

Cellular Front-End Module

Portable Medical Sensor

Use Scenario: Powering LNA, mixer, and VCO in 4G/5G handset RF transceivers.

IC Role / Device Role / Timing Role: Low-noise, low-dropout voltage source for RF signal chain biasing.

Use Value: 260nV/√Hz noise and 75dB PSRR prevent reciprocal mixing and phase noise degradation.

Use Scenario: Supplying analog front-end (AFE) and ADC in battery-operated ECG monitors.

IC Role / Device Role / Timing Role: Stable, accurate 4.0V rail for precision sensor excitation and reference generation.

Use Value: ±1% accuracy and <6mV load regulation ensure repeatable measurement gain and offset calibration.

Wireless IoT Node

Industrial Handheld Terminal

Use Scenario: Providing regulated power to BLE/Wi-Fi SoC and associated RF components.

IC Role / Device Role / Timing Role: Enable-controlled ULDO for dynamic power gating of radio subsystems.

Use Value: 1µA shutdown current extends multi-year battery life in periodic-sensing deployments.

Use Scenario: Powering display driver, touchscreen controller, and secure MCU in rugged handhelds.

IC Role / Device Role / Timing Role: Primary 4.0V supply with robust thermal and overcurrent protection.

Use Value: Internal thermal shutdown prevents field failure under high ambient temperature or mechanical stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-4002E/TT	250mA output, 600mV dropout at 250mA, 65dB PSRR @ 100Hz, no reverse-current protection	Limited to lower-current digital loads; unsuitable for RF noise-critical paths	Select only if cost is primary constraint and PSRR/noise requirements are relaxed.
Torex XC6210B402MR-G	300mA output, 200mV dropout at 100mA, 70dB PSRR @ 1kHz, no integrated thermal shutdown	Requires external thermal monitoring in high-power-density layouts	Prefer for space-constrained designs where 200mV dropout at light load suffices and thermal margin is controlled.

Compared with MCP1700T-4002E/TT and XC6210B402MR-G, the AP2210N-4.0TRG1 uniquely combines RF-grade PSRR, reverse-current blocking, and full thermal/overcurrent protection in SOT-23-5-making it the only choice for unattended, noise-sensitive, battery-critical systems.

Availability

AP2210N-4.0TRG1 is available at Aetrix Electronics and suitable for cellular front-end modules, portable medical sensors, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AP2210N-4.0TRG1 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AP2210 series belongs to Diodes' high-performance ULDO regulator product line, engineered specifically for noise-sensitive RF and battery-constrained portable electronics demanding ultra-low dropout and sub-µA shutdown current.

FAQ

What is the minimum input voltage required for AP2210N-4.0TRG1 to maintain regulation at 300mA?

The minimum input voltage is 4.25V-calculated as V_OUT + V_DROP(max) = 4.0V + 0.25V. At 300mA and +25°C, typical dropout is 250mV; maximum specified dropout is 500mV over temperature, so 4.5V is recommended for guaranteed operation across -40°C to +125°C.

Can AP2210N-4.0TRG1 be used without the BYP capacitor in non-RF applications?

Yes-the BYP pin is left unconnected or tied to GND in fixed-output versions when ultra-low noise is not required. The device remains fully functional and stable with standard 2.2µF C_OUT; the 100pF BYP capacitor is optional and only improves PSRR/noise performance in RF-sensitive designs.

Does AP2210N-4.0TRG1 require an external current-limiting resistor on the EN pin?

No-EN is CMOS/TTL compatible with I_IH ≤ 20µA and I_IL ≤ 2µA. Direct connection to 1.8V or 3.3V GPIO is safe; no series resistor is needed unless driving from open-drain logic or long traces requiring ESD filtering.

How does the AP2210N-4.0TRG1 behave during thermal shutdown?

When junction temperature exceeds ~150°C, the device disables the pass element and forces V_OUT to drop to near 0V. It automatically recovers once T_J falls below ~140°C hysteresis threshold-no external reset or cycling required. This protects both the regulator and downstream circuitry during sustained overload.

AP2210N-4.0TRG1 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:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 13.2V

Voltage - Output (Min/Fixed):: 4V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 180 µA

Current - Supply (Max):: 15 mA

PSRR:: 75dB (100Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

AP2210N-4.0TRG1 FAQ

1.How can I place an order for AP2210N-4.0TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2210N-4.0TRG1 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 AP2210N-4.0TRG1 reliable?

The price and inventory of AP2210N-4.0TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2210N-4.0TRG1 is usually 5 days.

3.What payment methods are accepted for AP2210N-4.0TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2210N-4.0TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2210N-4.0TRG1?

AP2210N-4.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2210N-4.0TRG1 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 AP2210N-4.0TRG1?

For technical support, including AP2210N-4.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2210N-4.0TRG1 requirements.

6.How does Aetrix verify that AP2210N-4.0TRG1 is sourced from the original manufacturer or authorized distributors?

All AP2210N-4.0TRG1 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 AP2210N-4.0TRG1 meets industry standards.

7.What is the process for return or replacement of AP2210N-4.0TRG1?

All AP2210N-4.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2210N-4.0TRG1, 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 AP2210N-4.0TRG1 part is unused and in its original packaging.

Return procedure for AP2210N-4.0TRG1:

1.Submit a request within 90 days.

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

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