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

Diodes Incorporated AP7341-36FS4-7

Name: AP7341-36FS4-7
Brand: Diodes Incorporated
SKU: AP7341-36FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341-36FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341-36FS4-7.pdf

Description:: IC REG LINEAR 3.6V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341-36FS4-7 from Diodes Incorporated is a 300mA, 3.6V fixed-output CMOS low-dropout regulator with ±1% output accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in compact portable communication devices.

For engineers reviewing the AP7341-36FS4-7 datasheet, AP7341-36FS4-7 pinout, AP7341-36FS4-7 application, or AP7341-36FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤270mV for 3.3V version, scaled per V_OUT), enable threshold compatibility (V_EN(H) ≥1.3V), thermal performance in X2-DFN1010-4, and low-noise biasing for sensitive analog/RF circuitry.

Technical Context

The AP7341-36FS4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit protection, and active enable control. Its low R_DS(ON) pass element enables high PSRR and minimal dropout across 1.7V–5.25V input range.

It delivers stable 3.6V output with ±1% accuracy over –40°C to +85°C, supports fast load transient response via ceramic C_OUT ≥1.0µF, and includes fold-back short-circuit protection clamping output current to ~55mA when V_OUT shorts to GND.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.6V ±1% at TA = +25°C; ±1.5% over full temperature range - ensures stable bias for RF power amplifiers and ADC references.
Max Output Current	300mA guaranteed - sufficient for powering baseband processors or multi-rail PMIC subsystems in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz) - meets low-noise requirements for RF synthesizers and precision analog signal chains.
Quiescent Current	35µA typical - extends battery life in always-on sensor or standby-mode subsystems.
Dropout Voltage	≤270mV at 300mA (for 3.3V version); extrapolated ≤300mV at 3.6V - enables operation from single-cell Li-ion (3.0V min) with margin.
Enable Threshold	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

Packaged in X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm height) with exposed thermal pad - optimized for ultra-dense PCB layouts and thermal dissipation in space-constrained mobile designs.

Pin/Terminal	Circuit Role	Design Meaning
PIN1	VOUT	Regulated 3.6V power output; requires low-impedance connection to load and local 1.0µF ceramic capacitor.
PIN2	GND	Analog/digital ground reference; must connect directly to PCB ground plane to minimize noise coupling.
PIN3	EN	Active-high enable; drives regulator ON/OFF; must not float - tie to VIN if always-on operation required.
PIN4	VIN	Input supply (1.7V–5.25V); requires 0.47µF ceramic decoupling capacitor placed adjacent to pin.
Thermal Pad	Exposed Pad	Non-electrical thermal interface; recommended to connect to large copper pour tied to GND for enhanced thermal dissipation.

Key Features

Feature	Design Value
Ultra-low quiescent current	35µA typical - reduces standby power loss in battery-powered IoT endpoints and wearables.
High PSRR at 1kHz	75dB - maintains clean 3.6V rail despite ripple from shared buck converter inputs.
Low output noise	60µV_rms (10Hz–100kHz) - avoids phase noise degradation in VCOs and PLLs powered from this rail.
Wide input voltage range	1.7V to 5.25V - supports direct connection to single-cell Li-ion, USB VBUS, or intermediate DC/DC outputs.
Integrated short-circuit protection	Fold-back current limit (~55mA) - prevents thermal runaway during board-level fault conditions without external circuitry.

Applications

RF Power Amplifier Bias

Mobile Baseband Processor Core Rail

Use Scenario: Providing clean, stable 3.6V bias to GaAs or SiGe RF power amplifiers in LTE/Wi-Fi front-end modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering regulated V_PA independent of noisy system supply transients.

Use Value: Prevents AM-to-PM distortion and EVM degradation by suppressing 1–100kHz switching noise from PMIC DC/DC stages.

Use Scenario: Supplying core logic voltage to application processors or modems operating at 3.6V nominal in smartphones and tablets.

IC Role / Device Role / Timing Role: Primary post-regulator ensuring tight voltage tolerance and fast load-step response during burst-mode processing.

Use Value: Maintains ±1% output accuracy across –40°C to +85°C, enabling reliable timing margin for high-speed digital interfaces.

Camera Image Sensor Analog Supply

Wireless Adapter Reference Voltage

Use Scenario: Powering analog pixel arrays and column ADCs in high-resolution mobile camera modules.

IC Role / Device Role / Timing Role: Ultra-low-noise 3.6V source minimizing temporal noise and fixed-pattern noise in image capture.

Use Value: 60µV_rms noise floor ensures >68dB SNR in 12-bit image pipelines without additional filtering.

Use Scenario: Generating stable 3.6V reference for USB 3.0/PCIe SerDes PHYs and Bluetooth/Wi-Fi SoCs in wireless adapters.

IC Role / Device Role / Timing Role: Precision voltage source for clock recovery circuits and analog front-ends requiring low jitter.

Use Value: 75dB PSRR at 1kHz attenuates host-controller switching noise, reducing deterministic jitter in high-speed data links.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3602E/TO	250mA max output, 6µA quiescent current, 65dB PSRR @1kHz - lower current, lower IQ, lower PSRR.	Suitable for ultra-low-power always-on sensors but insufficient for RF PA bias under peak load.	Select when standby current dominates design priority and 300mA peak is not required.
Torex XC6210B362MR-G	300mA output, 1.0µA standby current, 70dB PSRR @1kHz, 40µV_rms noise - slightly lower noise, lower IQ, same PSRR class.	Better suited for energy-harvesting nodes; lacks integrated thermal pad in SOT-25 package.	Prefer for space-tolerant designs where thermal pad layout is constrained and sub-µA shutdown is critical.

Compared with MCP1700-3602E/TO and XC6210B362MR-G, the AP7341-36FS4-7 uniquely balances 300mA drive capability, 75dB PSRR, and 60µV_rms noise in a thermally enhanced 1.0mm² DFN - making it optimal for RF and high-speed digital loads where both current and spectral purity are non-negotiable.

Availability

AP7341-36FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, mobile baseband processor core rails, camera image sensor analog supplies, and wireless adapter reference voltage generation requiring stable component supply across production lifecycles.

Supply support for AP7341-36FS4-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7341 belongs to Diodes' high-PSRR, low-noise LDO family engineered specifically for noise-sensitive portable electronics - emphasizing minimal footprint, thermal efficiency, and robust transient response in battery-powered RF and imaging systems.

FAQ

What is the minimum input voltage required for AP7341-36FS4-7 to maintain regulation at 300mA?

The AP7341-36FS4-7 requires VIN ≥ 3.87V to sustain 3.6V output at 300mA, based on maximum dropout of 270mV (per datasheet Section 7, "Electrical Characteristics"). At 25°C, typical dropout is 210mV, so 3.81V suffices. Operation below 3.81V risks output collapse under full load.

Does AP7341-36FS4-7 include reverse-current protection or output discharge functionality?

No - AP7341-36FS4-7 is the standard (non-discharge) version. It lacks an internal pull-down transistor on VOUT during shutdown. To prevent backfeed or slow discharge, external circuitry such as a series Schottky diode or MOSFET switch is required when VOUT may exceed other system rails during disable.

Can AP7341-36FS4-7 be used with ceramic output capacitors smaller than 1.0µF?

Yes - the device is stable with ≥0.47µF ceramic capacitors (per Application Information section). However, 1.0µF is recommended to ensure adequate phase margin under worst-case ESR and load-transient conditions. Capacitors below 0.47µF risk instability or excessive overshoot during 300mA load steps.

How does thermal performance of AP7341-36FS4-7 compare between PCBs with and without thermal pad connection?

With thermal pad soldered to a 25mm² GND copper pour, θ_JA drops to ~220°C/W (per JEDEC High-K board data). Without thermal pad connection, θ_JA exceeds 300°C/W - limiting continuous 300mA operation above 45°C ambient. Full thermal pad utilization is mandatory for sustained high-current use.

AP7341-36FS4-7 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):: 3.6V

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

AP7341-36FS4-7 FAQ

1.How can I place an order for AP7341-36FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341-36FS4-7 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 AP7341-36FS4-7 reliable?

The price and inventory of AP7341-36FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-36FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341-36FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-36FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341-36FS4-7?

AP7341-36FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341-36FS4-7 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 AP7341-36FS4-7?

For technical support, including AP7341-36FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-36FS4-7 requirements.

6.How does Aetrix verify that AP7341-36FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341-36FS4-7 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 AP7341-36FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341-36FS4-7?

All AP7341-36FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-36FS4-7, 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 AP7341-36FS4-7 part is unused and in its original packaging.

Return procedure for AP7341-36FS4-7:

1.Submit a request within 90 days.

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

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