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

Diodes Incorporated AP7341-32FS4-7

Name: AP7341-32FS4-7
Brand: Diodes Incorporated
SKU: AP7341-32FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341-32FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341-32FS4-7.pdf

Description:: IC REG LINEAR 3.2V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

AP7341-32FS4-7 from Diodes Incorporated is a 300mA, 3.2V fixed-output low-dropout linear regulator (LDO) in X2-DFN1010-4 package, featuring ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and ultra-low 35µA quiescent current. It delivers stable, low-noise power for RF supply rails and camera sensor biasing in space-constrained portable electronics.

For engineers reviewing the AP7341-32FS4-7 datasheet, AP7341-32FS4-7 pinout, AP7341-32FS4-7 application, or AP7341-32FS4-7 equivalent, this page provides verified technical context, pin-level design meaning, real-world application constraints, and validated alternative options for low-noise, high-PSRR LDO selection in battery-powered handheld systems.

Technical Context

The AP7341-32FS4-7 uses a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry to regulate 3.2V output from input voltages between 1.7V and 5.25V. Its enable-controlled shutdown draws only 0.01µA standby current and supports fast load transient response via low-ESR ceramic capacitor compatibility.

Thermal performance is optimized through the exposed thermal pad (not electrically connected to GND by default), requiring PCB copper area for dissipation. Dropout voltage is 0.21–0.27V at 300mA for V_OUT = 3.2V, enabling operation near battery end-of-discharge in single-cell Li-ion or multi-cell alkaline systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.2V ±1% over -40°C to +85°C - ensures stable bias for 3.3V-tolerant analog/RF ICs without external feedback network.
Max Output Current	300mA continuous - sufficient for powering image sensors, RF transceivers, or MCU core rails in compact mobile devices.
PSRR	75dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for clean RF supply domains.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise in VCOs and jitter in high-speed serial interfaces powered from this rail.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes or standby modes where low-power regulation is essential.
Dropout Voltage	0.21V at 300mA (V_OUT = 3.2V) - enables >93% efficiency at 3.4V input, supporting operation down to ~3.41V before regulation loss.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting; floating EN is prohibited.

Pinout & Package

X2-DFN1010-4 package: 1.0mm × 1.0mm footprint, 0.4mm height, thermally enhanced with exposed pad (non-functional unless connected to GND plane per layout guidance).

Pin/Terminal	Circuit Role	Design Meaning
PIN1: VOUT	Regulated power output	Must be decoupled with ≥1.0µF ceramic capacitor placed adjacent to pin; trace inductance directly impacts transient response and stability.
PIN2: GND	Power ground reference	Primary return path for output current; requires low-impedance connection to system ground plane to minimize noise coupling and dropout variation.
PIN3: EN	Active-high enable control	Drives internal pass transistor gate; must be driven to defined logic levels-floating causes undefined output state and potential shoot-through risk.
PIN4: VIN	Unregulated input supply	Requires ≥0.47µF ceramic decoupling close to pin; wide trace recommended to limit IR drop during 300mA load steps.

Key Features

Feature	Design Value
Ultra-low noise output	60µV_rms (10Hz–100kHz) enables direct powering of noise-sensitive RF front-ends without additional filtering.
High PSRR across frequency	75dB @ 1kHz, >60dB up to 100kHz - rejects ripple from upstream switching regulators, reducing need for LC post-filtering.
Low-quiescent-current shutdown	0.01µA I_STANDBY - preserves battery charge during extended sleep cycles in IoT edge nodes and wearable sensors.
CMOS process with low R_DS(ON)	Enables 0.21V dropout at 300mA for 3.2V output - maximizes usable battery voltage range in single-cell applications.
Integrated short-circuit protection	Fold-back current limit clamps output to ~55mA during V_OUT-to-GND fault - prevents thermal runaway without external current-sense circuitry.

Applications

Smartphone Camera Module

Wi-Fi/Bluetooth RF Transceiver

Use Scenario: Powers CIS (CMOS Image Sensor) analog and digital rails in dual-camera smartphone designs with tight board area constraints.

IC Role / Device Role / Timing Role: Provides low-noise 3.2V bias for sensor pixel array and ADC reference, replacing noisier switching solutions.

Use Value: 60µV_rms noise prevents fixed-pattern noise in captured images; 300mA capacity supports dual-sensor burst capture without rail collapse.

Use Scenario: Supplies clean 3.2V VDDPA and VDDRX rails for 2.4GHz/5GHz Wi-Fi 6 and Bluetooth 5.0 SoCs in compact tablets and dongles.

IC Role / Device Role / Timing Role: Acts as post-regulator after buck converter, suppressing switching artifacts that degrade EVM and receiver sensitivity.

Use Value: 75dB PSRR at 1kHz reduces conducted EMI into RF sections; fast load transient response maintains voltage within ±2% during TX/RX mode switching.

Portable Media Player Audio Codec

Wireless Headset ANC Circuit

Use Scenario: Delivers regulated 3.2V to stereo audio DAC/ADC and headphone amplifier in battery-powered media players.

IC Role / Device Role / Timing Role: Low-noise LDO supplying reference and analog supply for high-SNR audio conversion stages.

Use Value: 60µV_rms noise floor ensures >105dB SNR in 24-bit playback; ±1% accuracy maintains consistent THD+N across temperature and load.

Use Scenario: Powers active noise cancellation (ANC) feedforward/feedback microphones and DSP in true wireless stereo earbuds.

IC Role / Device Role / Timing Role: Enables always-on low-power operation of microphone bias and analog front-end while minimizing battery drain.

Use Value: 35µA quiescent current extends ANC runtime beyond 6 hours on 50mAh battery; 0.21V dropout allows use until battery reaches 3.41V.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361-32FS4-7	Same package and 3.2V output, but rated for 600mA and higher 500mW PD; quiescent current 55µA vs. 35µA.	Better suited for higher-current loads like multi-core PMIC rails; less optimal for ultra-low-power standby due to higher I_Q.	Select when peak current exceeds 300mA or thermal margin is constrained; avoid if <40µA I_Q is mandatory.
MCP1700-3202E/TO	TO-92 package (larger footprint), 250mA max, 6.5µA I_Q, 65dB PSRR @ 1kHz, 30µV_rms noise.	Lower noise and I_Q, but lower current rating and through-hole mounting limits PCB density in modern portable designs.	Prefer for cost-sensitive, low-volume, or legacy through-hole assemblies where 250mA suffices and board area is not constrained.

Compared with AP7341-32FS4-7, AP7361-32FS4-7 trades 20µA higher quiescent current for 2× output current and improved thermal handling, while MCP1700-3202E/TO sacrifices miniaturization and current capability for ultra-low I_Q and noise-making each suitable for distinct power-density versus efficiency trade-offs.

Availability

AP7341-32FS4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, Wi-Fi/Bluetooth RF transceivers, portable media player audio codecs, and wireless headset ANC circuits requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AP7341-32FS4-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal components for power management, signal integrity, and connectivity applications.

The AP7341 belongs to Diodes' high-PSRR, low-noise LDO product line designed specifically for noise-sensitive portable electronics including smartphones, tablets, and wireless audio devices where clean, efficient, and space-saving regulation is critical.

FAQ

What is the minimum input voltage required for AP7341-32FS4-7 to maintain regulation at full 300mA load?

The minimum input voltage is calculated as V_OUT + V_DROP = 3.2V + 0.27V = 3.47V under worst-case conditions (85°C, 300mA). At 25°C, dropout is 0.21V, so 3.41V suffices. Operation below these thresholds results in unregulated output and potential system reset or brownout.

Can the thermal pad on the X2-DFN1010-4 package be left unconnected?

Yes-the thermal pad has no electrical function and may be left floating, though Diodes recommends connecting it to the GND plane via multiple vias for optimal thermal dissipation. Leaving it unconnected reduces thermal resistance by ~15°C/W compared to isolation, improving reliability under sustained 300mA loads.

Does AP7341-32FS4-7 include reverse-current blocking?

No-AP7341-32FS4-7 lacks integrated reverse-current blocking. If V_OUT exceeds V_VIN (e.g., during hot-swap or backup battery scenarios), current can flow backward from output to input. An external Schottky diode in series with VIN is required for reverse-polarity or backfeed protection.

Is an input capacitor mandatory, and what value is recommended?

Yes-an input capacitor is mandatory for stability and input ripple suppression. Diodes specifies a minimum 0.47µF X5R/X7R ceramic capacitor placed within 2mm of the VIN and GND pins. For systems with high di/dt loads, a 1.0µF capacitor is recommended to prevent input voltage sag during 300mA transient steps.

AP7341-32FS4-7 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):: 3.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.65V @ 300mA

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

AP7341-32FS4-7 FAQ

1.How can I place an order for AP7341-32FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341-32FS4-7 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 AP7341-32FS4-7 reliable?

The price and inventory of AP7341-32FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-32FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341-32FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-32FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341-32FS4-7?

AP7341-32FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341-32FS4-7 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 AP7341-32FS4-7?

For technical support, including AP7341-32FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-32FS4-7 requirements.

6.How does Aetrix verify that AP7341-32FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341-32FS4-7 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 AP7341-32FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341-32FS4-7?

All AP7341-32FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-32FS4-7, 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 AP7341-32FS4-7 part is unused and in its original packaging.

Return procedure for AP7341-32FS4-7:

1.Submit a request within 90 days.

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

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