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

Diodes Incorporated AP7341-11FS4-7

Name: AP7341-11FS4-7
Brand: Diodes Incorporated
SKU: AP7341-11FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341-11FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341-11FS4-7.pdf

Description:: IC REG LINEAR 1.1V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341-11FS4-7 from Diodes Incorporated is a 300mA, 1.1V fixed-output low-dropout linear regulator (LDO) with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It operates from 1.7V to 5.25V input, features enable control, and targets RF supply rails in compact portable electronics.

For engineers reviewing the AP7341-11FS4-7 datasheet, AP7341-11FS4-7 pinout, AP7341-11FS4-7 application, or AP7341-11FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤270mV for 1.1V output), thermal performance in X2-DFN1010-4, EN logic thresholds (0.5V_IL/1.3V_IH), and stability with 1µF ceramic output capacitance.

Technical Context

The AP7341-11FS4-7 uses a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input provides precise on/off control without floating-state risk, and internal resistor network fixes V_OUT at 1.1V.

Designed for high-PSRR, low-noise operation, it achieves 75dB ripple rejection at 1kHz and maintains ±1% output accuracy across –40°C to +85°C ambient, with temperature coefficient of ±30ppm/°C. Dropout voltage is specified at 210–270mV for 300mA load at 1.1V output.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.1V ±1% at 25°C; ±1.5% over –40°C to +85°C - ensures stable core bias for low-voltage RF ICs
Max Output Current	300mA guaranteed - supports moderate-current analog/RF blocks without external boost
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding RF sections
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise degradation in VCO/PLL power rails
Quiescent Current	35µA typical - enables ultra-low-power standby modes in always-on wireless receivers
Input Voltage Range	1.7V to 5.25V - compatible with single-cell Li-ion, Li-poly, or regulated 3.3V/5V system rails
Dropout Voltage	210–270mV at 300mA - allows regulation from 1.31V input, critical for battery brownout resilience

Pinout & Package

The AP7341-11FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad, optimized for minimal PCB footprint and high-density layouts in mobile devices.

Pin/Terminal	Circuit Role	Design Meaning
PIN1: VOUT	Regulated Power Output	Delivers stable 1.1V to load; requires 1µF ceramic capacitor placed adjacent to pin for transient response and stability
PIN2: GND	Power Ground Reference	Primary return path for output current; must connect directly to low-impedance ground plane to minimize noise coupling
PIN3: EN	Enable Control Input	Active-high logic: ≥1.3V enables regulator; ≤0.5V disables it; must not float - ties to VIN if always-on operation required
PIN4: VIN	Unregulated Power Input	Accepts 1.7–5.25V input; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin to suppress supply glitches

Key Features

Feature	Design Value
High PSRR	75dB at 1kHz - preserves signal integrity in RF front-end power domains by rejecting coupled switching noise
Ultra-Low Noise	60µV_rms (10Hz–100kHz) - prevents amplitude/phase modulation in sensitive analog circuits like LNAs and mixers
Low Quiescent Current	35µA typical - extends battery life in sleep-mode applications such as Bluetooth LE receivers and IoT sensors
Tight Output Accuracy	±1% at 25°C, ±1.5% over full temperature range - ensures consistent biasing for precision analog and RF ICs
Small Footprint	X2-DFN1010-4 (1.0mm × 1.0mm) - enables placement directly under BGA packages or in tight RF module layouts

Applications

RF Power Amplifier Bias

Low-Noise Analog Front-End

Use Scenario: Providing clean 1.1V bias to GaAs or SiGe RF power amplifiers in smartphone transceivers.

IC Role / Device Role / Timing Role: LDO supplies stable gate/base bias voltage; no timing function - pure analog power regulation.

Use Value: 75dB PSRR prevents PA gain compression from PMIC switching noise; 60µV_rms noise avoids EVM degradation.

Use Scenario: Powering low-noise amplifiers (LNAs) and mixer cores in 5G sub-6GHz front-end modules.

IC Role / Device Role / Timing Role: Precision analog rail generator; zero timing dependency - delivers low-drift DC bias.

Use Value: ±1% output accuracy maintains consistent LNA gain across temperature; 35µA I_Q reduces idle power in TDD systems.

Camera Sensor Core Supply

Wireless Adapter Baseband

Use Scenario: Supplying 1.1V core voltage to high-resolution CMOS image sensor digital logic and ADC interface.

IC Role / Device Role / Timing Role: Low-noise digital domain regulator; supports fast load transients during frame capture bursts.

Use Value: 300mA capability handles peak digital switching currents; 210–270mV dropout sustains regulation during battery sag.

Use Scenario: Powering baseband processor I/O or memory interface in Wi-Fi 6/Bluetooth 5.3 USB dongles.

IC Role / Device Role / Timing Role: Dedicated I/O rail regulator; enables independent voltage scaling for signal integrity.

Use Value: Enable pin allows synchronized power-up with host controller; X2-DFN1010-4 footprint fits narrow USB-A form factor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1102E/TT (Microchip)	1.1V fixed, 250mA max, 6µA I_Q, 65dB PSRR @1kHz, SOT-23-5 package	Limited current headroom for burst-mode loads; lower PSRR impacts RF-sensitive designs	Prefer when ultra-low I_Q dominates over RF noise immunity and 300mA peak demand
Torex XC6210B112MR-G (Torex)	1.1V fixed, 300mA, 25µA I_Q, 70dB PSRR @1kHz, SOT-25 package	Slightly lower PSRR and higher dropout (300mV @300mA); larger SOT-25 footprint vs. X2-DFN1010-4	Choose when board space permits SOT-25 and marginal PSRR reduction is acceptable for cost-sensitive production

Compared with MCP1700T-1102E/TT and XC6210B112MR-G, the AP7341-11FS4-7 delivers superior RF noise suppression (75dB PSRR), tighter output accuracy (±1%), and smallest PCB footprint - making it optimal for space-constrained, high-performance wireless front-ends where power integrity directly affects link budget.

Availability

AP7341-11FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, low-noise analog front-end, and wireless adapter baseband applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7341-11FS4-7 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 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for powering noise-sensitive RF and analog circuits in portable wireless devices - emphasizing minimal footprint, thermal efficiency, and precision regulation under dynamic load conditions.

FAQ

What is the minimum input voltage required for stable 1.1V output at 300mA?

The AP7341-11FS4-7 requires a minimum input voltage of 1.31V to maintain regulation at 300mA, based on its maximum dropout voltage of 270mV at that load. Below this, output voltage collapses linearly with input; operation below 1.7V is outside recommended conditions per datasheet Section 4.

Does the AP7341-11FS4-7 include output discharge functionality?

No - the AP7341-11FS4-7 is the non-discharge version. The "D" suffix (e.g., AP7341D-11FS4-7) denotes built-in auto-discharge. This part lacks the internal NMOS discharge path, so VOUT remains floating after shutdown unless externally discharged via a bleed resistor.

Can the EN pin be left unconnected if always-on operation is needed?

No - the EN pin must never be left floating. For permanent enable, tie EN directly to VIN. Floating EN causes undefined behavior and potential oscillation due to noise susceptibility; the datasheet explicitly states it "must not be floating" and defines valid logic thresholds (0–0.5V low, 1.3–5.25V high).

What is the recommended output capacitor value and type for optimal stability?

A 1.0µF X5R/X7R ceramic capacitor placed within 2mm of VOUT and GND pins is recommended. The device is stable with low-ESR ceramics; bulk capacitors are unnecessary unless large transient loads (>100mA step) exist. Avoid high-ESR electrolytics - ESR >100mΩ risks instability per Figure 19's stability boundary.

AP7341-11FS4-7 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):: 1.1V

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

AP7341-11FS4-7 FAQ

1.How can I place an order for AP7341-11FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341-11FS4-7 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 AP7341-11FS4-7 reliable?

The price and inventory of AP7341-11FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-11FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341-11FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-11FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341-11FS4-7?

AP7341-11FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341-11FS4-7 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 AP7341-11FS4-7?

For technical support, including AP7341-11FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-11FS4-7 requirements.

6.How does Aetrix verify that AP7341-11FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341-11FS4-7 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 AP7341-11FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341-11FS4-7?

All AP7341-11FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-11FS4-7, 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 AP7341-11FS4-7 part is unused and in its original packaging.

Return procedure for AP7341-11FS4-7:

1.Submit a request within 90 days.

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

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