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

Diodes Incorporated AP7341-31FS4-7

Name: AP7341-31FS4-7
Brand: Diodes Incorporated
SKU: AP7341-31FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341-31FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341-31FS4-7.pdf

Description:: IC REG LINEAR 3.1V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341-31FS4-7 from Diodes Incorporated is a 300mA, 3.1V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply and portable media subsystems in space-constrained handheld devices.

For engineers reviewing the AP7341-31FS4-7 datasheet, AP7341-31FS4-7 pinout, AP7341-31FS4-7 application, or AP7341-31FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤270mV for 3.1V output), EN pin logic thresholds (0.5V_IL/1.3V_IH), thermal performance in X2-DFN1010-4, and compatibility with 1µF ceramic input/output capacitors.

Technical Context

The AP7341-31FS4-7 employs a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable-controlled shutdown draws only 0.01µA standby current and supports fast load transient response due to low output impedance and optimized internal compensation.

It operates across 1.7V–5.25V input range while maintaining regulation down to 210mV dropout at 300mA for V_OUT = 3.1V. The device includes short-circuit protection clamping output current to ~55mA and features an exposed thermal pad for enhanced power dissipation in the X2-DFN1010-4 package.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.1V ±1% at +25°C; ±1.5% over −40°C to +85°C - ensures stable core/bias rail for RF ICs and sensors.
Max Output Current	300mA guaranteed - sufficient for powering baseband processors, camera ISPs, or wireless transceivers.
PSRR	75dB at 1kHz - suppresses switching noise from PMICs or DC-DC converters feeding adjacent analog circuits.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase jitter in clock-sensitive RF front-ends and ADC references.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes of portable devices.
Dropout Voltage	270mV max at 300mA - enables operation from single-cell Li-ion (3.0V min) while sustaining full load.
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

The AP7341-31FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with wettable flank leads and an exposed thermal pad (connected to GND in PCB layout for optimal thermal performance).

Pin/Terminal	Circuit Role	Design Meaning
PIN1: VOUT	Regulated Power Output	Delivers clean 3.1V to load; requires 1µF ceramic capacitor placed adjacent to pin for stability and transient response.
PIN2: GND	Analog & Power Ground Reference	Primary return path for output current and internal bias; must connect directly to low-impedance ground plane.
PIN3: EN	Active-High Enable Control	Drives regulator ON when ≥1.3V; pulls output to high-impedance OFF state when ≤0.5V; must not float.
PIN4: VIN	Unregulated Input Supply	Accepts 1.7V–5.25V input; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin.

Key Features

Feature	Design Value
Ultra-low noise output	60µV_rms (10Hz–100kHz) - preserves SNR in audio codecs and RF synthesizers.
High PSRR at low frequency	75dB @ 1kHz - rejects ripple from buck converters operating at 500kHz–2MHz with 2nd-stage filtering.
Low-quiescent-current shutdown	0.01µA I_STANDBY - reduces system leakage during deep sleep without external MOSFET isolation.
Thermally enhanced DFN	X2-DFN1010-4 with exposed pad - achieves 210°C/W θ_JA on 2-layer JEDEC board, enabling 300mA continuous operation.
Robust short-circuit protection	Fold-back current limit of 55mA - prevents thermal runaway during V_OUT-to-GND faults without latch-up.

Applications

RF Power Amplifier Bias Supply

Camera Image Signal Processor Core Rail

Use Scenario: Providing ultra-low-noise 3.1V bias to GaAs pHEMT PA stages in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: LDO delivers clean, ripple-free voltage to PA drain terminal, minimizing AM-to-PM distortion and EVM degradation.

Use Value: 60µV_rms noise and 75dB PSRR prevent LO pulling and spectral regrowth under dynamic transmit conditions.

Use Scenario: Powering the digital core of CMOS image sensors and ISP SoCs in smartphone camera modules.

IC Role / Device Role / Timing Role: Regulator supplies stable 3.1V domain for pixel processing logic and embedded memory, synchronized with frame capture timing.

Use Value: ±1% accuracy and <270mV dropout ensure reliable operation across battery discharge curve (3.6V → 3.0V) without brownout.

Wireless Adapter Baseband Core

Portable Media Player Audio DAC Reference

Use Scenario: Delivering regulated 3.1V to Wi-Fi/BT SoC baseband processors in compact USB dongles and IoT gateways.

IC Role / Device Role / Timing Role: LDO serves as primary core rail for ARM Cortex-M subsystems, enabling low-power sleep/wake cycles via EN pin control.

Use Value: 35µA quiescent current and 0.01µA shutdown reduce average system power by >15% in duty-cycled connectivity applications.

Use Scenario: Generating precision 3.1V reference for stereo audio DACs and headphone amplifiers in portable music players.

IC Role / Device Role / Timing Role: Provides low-noise analog supply independent of noisy digital rails, critical for THD+N < −105dB performance.

Use Value: 60µV_rms noise floor avoids audible hiss; ±1% tolerance maintains consistent full-scale output voltage across temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3102E/TO	300mA, 3.1V, ±2% accuracy, 65dB PSRR @ 1kHz, 110µV_rms noise, SOT-23-5 package	Higher noise and lower PSRR; larger footprint; no thermal pad	Use where cost sensitivity outweighs noise/PSRR requirements and PCB area permits SOT-23.
Torex XC6219B312MR-G	300mA, 3.1V, ±2% accuracy, 70dB PSRR @ 1kHz, 45µV_rms noise, SOT-25 package	Slightly lower noise but no enable pin; requires external pull-up for always-on operation	Prefer when enable functionality is unnecessary and lowest possible noise is prioritized over control flexibility.

Compared with MCP1700-3102E/TO and XC6219B312MR-G, the AP7341-31FS4-7 uniquely combines 3.1V precision, industry-leading 75dB PSRR, and 1.0mm² DFN packaging with active enable - making it optimal for miniaturized RF and imaging subsystems demanding both performance and footprint efficiency.

Availability

AP7341-31FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP core rails, wireless adapter baseband supplies, and portable media player audio DAC references requiring stable component supply across production lifecycles.

Supply support for AP7341-31FS4-7 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-reliability power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7341 series belongs to Diodes' high-PSRR, low-noise LDO portfolio engineered specifically for noise-sensitive RF, imaging, and portable multimedia applications where small size and battery efficiency are critical.

FAQ

What is the maximum allowable input voltage for AP7341-31FS4-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may trigger overvoltage stress and reduce long-term reliability, even if within absolute ratings. Operation above 5.25V is not characterized or guaranteed per datasheet specifications.

Does AP7341-31FS4-7 include reverse-current protection or output auto-discharge?

No - the AP7341-31FS4-7 is the non-discharge version (no 'D' suffix). It lacks internal output discharge FET; when disabled, VOUT remains floating and decays only through external load or parasitic paths. For rapid VOUT discharge, an external resistor or dedicated discharge circuit is required.

Can AP7341-31FS4-7 operate with ceramic output capacitors smaller than 1µF?

Yes - the device is stable with ≥0.47µF ceramic output capacitors. However, 1µF is recommended for optimal transient response under 300mA load steps. Capacitors below 0.47µF may cause instability or excessive overshoot, especially with high-ESR types or elevated temperature.

How is thermal performance affected if the thermal pad is left unconnected?

Leaving the thermal pad unconnected increases junction-to-ambient thermal resistance by ~60°C/W, reducing safe continuous output current to ~150mA at +85°C ambient. For full 300mA capability, the pad must be soldered to a ≥25mm² copper pour tied to GND - per Diodes' recommended layout guidelines.

AP7341-31FS4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-XDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.25V

Voltage - Output (Min/Fixed):: 3.1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.27V @ 150mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1010-4

AP7341-31FS4-7 FAQ

1.How can I place an order for AP7341-31FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341-31FS4-7 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 AP7341-31FS4-7 reliable?

The price and inventory of AP7341-31FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-31FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341-31FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-31FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341-31FS4-7?

AP7341-31FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341-31FS4-7 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 AP7341-31FS4-7?

For technical support, including AP7341-31FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-31FS4-7 requirements.

6.How does Aetrix verify that AP7341-31FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341-31FS4-7 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 AP7341-31FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341-31FS4-7?

All AP7341-31FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-31FS4-7, 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 AP7341-31FS4-7 part is unused and in its original packaging.

Return procedure for AP7341-31FS4-7:

1.Submit a request within 90 days.

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

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