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

Diodes Incorporated AP7341D-36FS4-7

Name: AP7341D-36FS4-7
Brand: Diodes Incorporated
SKU: AP7341D-36FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341D-36FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341D-36FS4-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341D-36FS4-7 from Diodes Incorporated is a 300mA, 3.3V fixed-output low-dropout linear regulator in X2-DFN1010-4 package, featuring ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - optimized for RF supply and portable media player power rails.

For engineers reviewing the AP7341D-36FS4-7 datasheet, AP7341D-36FS4-7 pinout, AP7341D-36FS4-7 application, or AP7341D-36FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤400mV for 3.3V output), enable threshold compatibility (V_EN(H) ≥1.3V), thermal performance with thermal pad layout, and discharge functionality enabled by the 'D' suffix.

Technical Context

The AP7341D-36FS4-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active pull-down discharge path activated during shutdown. Its architecture supports fast load transient response (<100µs recovery) and stable operation with 1µF ceramic output capacitors.

It operates across 1.7V–5.25V input range, delivers regulated 3.3V output with ±1.5% accuracy over −40°C to +85°C, and includes short-circuit protection clamping output current to ~60mA when V_OUT shorts to GND.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±1% at +25°C; ±1.5% over full temperature range - ensures stable core/logic rail for 3.3V microcontrollers and RF ICs.
Max Output Current	300mA guaranteed - sufficient to power baseband processors, camera sensors, or wireless adapters without thermal derating in typical handheld layouts.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy input rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase jitter in RF synthesizers and analog audio paths.
Quiescent Current	35µA typical - extends battery life in always-on sensor or standby-mode subsystems.
Dropout Voltage	300mV max at 300mA (V_OUT = 3.3V) - enables operation from single-cell Li-ion (3.0V min) or 3.3V system rails with margin.
Enable Threshold	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO control without level-shifting.

Pinout & Package

X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch) with exposed thermal pad - requires PCB copper pour connected to GND for optimal thermal dissipation (θ_JA ≈ 220°C/W on JEDEC High-K board).

Pin/Terminal	Circuit Role	Design Meaning
PIN1: VOUT	Regulated power output	Must be decoupled with ≥1µF ceramic capacitor placed adjacent to pin; low-ESR cap critical for transient stability.
PIN2: GND	Power ground reference	Primary return path for output current; connects directly to thermal pad and system ground plane to minimize impedance.
PIN3: EN	Active-high enable control	Pulling below 0.5V disables regulator and activates internal discharge path ('D' suffix); must not float.
PIN4: VIN	Unregulated input supply	Requires ≥0.47µF ceramic decoupling capacitor placed within 2mm; wide trace recommended for high di/dt transients.

Key Features

Feature	Design Value
Integrated discharge FET	30Ω on-resistance between VOUT and GND during shutdown - rapidly discharges output capacitance to prevent hold-up voltage in multi-rail systems.
Ultra-low noise output	60µV_rms broadband noise - eliminates need for post-LDO LC filtering in sensitive RF/analog signal chains.
High PSRR at low frequency	75dB rejection at 1kHz - maintains clean 3.3V rail despite ripple from buck converter switching at 500kHz–2MHz.
Wide input voltage range	1.7V to 5.25V operation - supports direct connection to single-cell Li-ion, USB VBUS, or intermediate 3.3V/5V distribution rails.
±1% output accuracy	Tight regulation over line/load/temperature - ensures reliable operation of 3.3V I/O interfaces and ADC references without calibration.

Applications

Smartphone Baseband Power

RF Transceiver Supply

Use Scenario: Powers 3.3V I/O and analog sections of LTE/Wi-Fi baseband processors during active data transmission.

IC Role / Device Role / Timing Role: Low-noise post-regulator for noise-sensitive mixed-signal blocks; provides clean bias independent of noisy PMIC switchers.

Use Value: 60µV_rms noise prevents EVM degradation in 256-QAM transmissions; 75dB PSRR rejects coupled ripple from adjacent 2MHz buck converters.

Use Scenario: Supplies VCC for RF front-end modules (FEMs) and local oscillators in sub-6GHz 5G handsets.

IC Role / Device Role / Timing Role: Dedicated LDO for RF VDD pins requiring ultra-low phase noise and fast transient response.

Use Value: 300mA capability supports peak FEM current bursts; <400mV dropout enables use with battery voltages down to 3.0V while maintaining 3.3V regulation.

Portable Camera Sensor Bias

Wireless Adapter Core Rail

Use Scenario: Provides regulated 3.3V to CIS image sensors and ISP cores in compact action cameras and drones.

IC Role / Device Role / Timing Role: Primary analog supply for pixel array and column ADCs; must reject digital switching noise from nearby SoC.

Use Value: ±1% accuracy ensures consistent white balance and gain calibration; 35µA quiescent current minimizes standby drain during sensor sleep modes.

Use Scenario: Powers 3.3V logic and PHY layers of Bluetooth 5.0/USB Wi-Fi dongles in battery-powered IoT gateways.

IC Role / Device Role / Timing Role: Enable-controlled power domain for peripheral interface - allows host MCU to power-cycle adapter independently.

Use Value: Active discharge ('D' suffix) clears VOUT within 100µs after EN deassertion, preventing bus contention during hot-plug detection sequences.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	250mA output, 6µA IQ, no enable or discharge; SOT-23-5 package	Lacks EN control and active discharge; limited to low-current always-on rails	Select only if system requires ultra-low IQ and no dynamic power gating.
Torex XC6210B332MR-G	300mA, 3.3V, 25µA IQ, built-in discharge, SOT-25 package	Larger footprint (2.9mm × 2.8mm vs. 1.0mm × 1.0mm); lower PSRR (65dB @1kHz)	Prefer when board space permits larger package and lower cost outweighs PSRR/noise requirements.

Compared with MCP1700-3302E/TO and XC6210B332MR-G, the AP7341D-36FS4-7 uniquely combines ultra-small X2-DFN1010-4 footprint, 75dB PSRR, and integrated discharge - making it optimal for space-constrained, noise-sensitive, and dynamically powered RF subsystems.

Availability

AP7341D-36FS4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver supply, and portable camera sensor bias requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7341D-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-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 designed specifically for noise-critical power domains in portable wireless devices - emphasizing small size, fast transient response, and robust enable/discharge control.

FAQ

What does the 'D' suffix in AP7341D-36FS4-7 indicate?

The 'D' suffix denotes integrated active discharge functionality: when the EN pin is pulled low, an internal 30Ω NMOS FET connects VOUT to GND, discharging external output capacitance within microseconds. This prevents residual voltage from interfering with downstream logic sequencing or causing latch-up in multi-rail systems.

Can AP7341D-36FS4-7 operate with input voltage below 1.7V?

No - the absolute minimum input voltage is 1.7V per datasheet specifications. Below this, regulation fails and output collapses. For sub-1.7V operation, consider Diodes' AP7361 series (1.0V min VIN) or alternative ultra-low-VIN LDOs; the AP7341D-36FS4-7 is not characterized or guaranteed below 1.7V.

Is thermal pad connection mandatory for AP7341D-36FS4-7?

Yes - the exposed thermal pad (pin 5, non-electrical) must be soldered to a PCB copper pour connected to GND. Without this, junction-to-ambient thermal resistance exceeds 220°C/W, risking thermal shutdown at >150mA load in still-air conditions. Minimum recommended copper area is 25mm² with 4+ thermal vias to inner ground planes.

How does PSRR vary with load current and frequency?

PSRR remains ≥75dB at 1kHz up to 300mA load, but degrades above 10kHz: 65dB at 100kHz and 45dB at 1MHz. This behavior is inherent to CMOS LDO architecture. For high-frequency noise suppression, pair with a ferrite bead + capacitor filter upstream, or select a different regulator topology if >60dB rejection beyond 100kHz is required.

AP7341D-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

AP7341D-36FS4-7 FAQ

1.How can I place an order for AP7341D-36FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341D-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 AP7341D-36FS4-7 reliable?

The price and inventory of AP7341D-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 AP7341D-36FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341D-36FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341D-36FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341D-36FS4-7?

AP7341D-36FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341D-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 AP7341D-36FS4-7?

For technical support, including AP7341D-36FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341D-36FS4-7 requirements.

6.How does Aetrix verify that AP7341D-36FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341D-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 AP7341D-36FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341D-36FS4-7?

All AP7341D-36FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341D-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 AP7341D-36FS4-7 part is unused and in its original packaging.

Return procedure for AP7341D-36FS4-7:

1.Submit a request within 90 days.

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

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