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

Diodes Incorporated AP7341D-11FS4-7

Name: AP7341D-11FS4-7
Brand: Diodes Incorporated
SKU: AP7341D-11FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341D-11FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341D-11FS4-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

AP7341D-11FS4-7 from Diodes Incorporated is a 300mA, 1.1V 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. It delivers high power supply rejection and ultra-low noise for RF supply rails in compact portable devices.

For engineers reviewing the AP7341D-11FS4-7 datasheet, AP7341D-11FS4-7 pinout, AP7341D-11FS4-7 application, or AP7341D-11FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤270mV for 1.1V V_OUT), enable threshold compatibility (V_EN(H) ≥1.3V), thermal performance in 1.0mm × 1.0mm DFN, and built-in auto-discharge functionality.

Technical Context

The AP7341D-11FS4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input (EN) provides precise on/off control with defined logic thresholds (V_EN(L) ≤0.5V, V_EN(H) ≥1.3V) and sub-1µA standby current.

It includes short-circuit protection clamping output current to ~55mA and features an internal N-channel auto-discharge transistor (R_ON ≈30Ω) activated during shutdown to rapidly discharge V_OUT, eliminating external discharge circuitry in battery-powered systems.

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 logic and RF ICs
Max Output Current	300mA guaranteed - supports moderate-power digital subsystems and analog front-ends
Dropout Voltage	270mV max at 300mA (V_OUT = 1.1V) - enables operation from single-cell Li-ion or 1.8V/2.5V rails with margin
PSRR	75dB at 1kHz - suppresses switching noise from DC-DC converters feeding sensitive RF/analog stages
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise in VCOs and jitter in high-speed interfaces
I_Q / I_STANDBY	35µA typical active, 0.01µA typical shutdown - extends battery life in always-on sensor nodes
Enable Thresholds	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V and 3.3V GPIO without level-shifting

Pinout & Package

X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch) with exposed thermal pad. Optimized for minimal PCB footprint and high-density layouts in space-constrained mobile applications.

Pin/Terminal	Circuit Role	Design Meaning
1 - VOUT	Regulated power output	Delivers clean 1.1V to load; requires local 1.0µF ceramic capacitor placed adjacent to pin
2 - GND	Power ground reference	Must connect directly to low-impedance ground plane; ties thermal pad for heat dissipation
3 - EN	Active-high enable control	Pulling ≥1.3V enables regulation; ≤0.5V disables output and activates auto-discharge
4 - VIN	Unregulated input supply	Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling capacitor placed within 2mm

Key Features

Feature	Design Value
Auto-discharge function	Integrated 30Ω N-channel FET discharges VOUT in shutdown - eliminates need for external resistor, saving board area and leakage path
Ultra-low noise output	60µV_rms broadband noise - preserves signal integrity in RF transceivers and high-resolution ADCs
High PSRR at low frequency	75dB @ 1kHz - rejects ripple from buck converter switching frequencies and their harmonics
Low dropout at full load	270mV max @ 300mA - maintains regulation down to 1.37V input for 1.1V output, critical for aging batteries
Wide input voltage range	1.7V to 5.25V - supports direct connection to multiple rail sources including Li-ion, USB, and intermediate DC-DC outputs

Applications

RF Power Amplifier Bias

Low-Voltage Microcontroller Core

Use Scenario: Providing clean, stable 1.1V bias to GaAs or SiGe RF power amplifiers in LTE/Wi-Fi front-end modules.

IC Role / Device Role / Timing Role: Low-noise LDO supplying PA drain voltage; replaces noisier switching regulators to reduce EVM degradation.

Use Value: 60µV_rms noise and 75dB PSRR prevent AM-to-PM distortion and maintain ACLR compliance under dynamic load.

Use Scenario: Powering 1.1V core of ARM Cortex-M0+ or RISC-V microcontrollers in wearable sensors and BLE peripherals.

IC Role / Device Role / Timing Role: Primary core regulator enabling deep-sleep modes with sub-µA shutdown current and fast wake-up via EN pin.

Use Value: 35µA quiescent current and 0.01µA standby extend coin-cell life beyond 5 years in maintenance-free IoT nodes.

Camera Image Sensor Analog Rail

Wireless Transceiver VDDIO

Use Scenario: Supplying analog pixel array and column ADC in 1.1V CIS modules used in smartphone front cameras.

IC Role / Device Role / Timing Role: Dedicated low-noise analog LDO isolating sensor analog section from noisy digital domains.

Use Value: ±1% output accuracy and <30ppm/°C tempco ensure consistent ADC reference stability across temperature, reducing calibration overhead.

Use Scenario: Regulating 1.1V I/O supply for Bluetooth 5.0 or Zigbee SoCs requiring strict VDDIO tolerance during packet transmission bursts.

IC Role / Device Role / Timing Role: Fast-transient LDO responding to 0–300mA load steps in <100µs to prevent I/O voltage droop-induced CRC errors.

Use Value: 270mV dropout and low-ESR ceramic support enable stable operation even when input sags to 1.37V during peak transmit current.

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	250mA max output, 6µV_rms noise (10Hz–100kHz), no enable pin, no auto-discharge	Lacks EN control and discharge - requires external pull-up and discharge resistor for shutdown sequencing	Preferred where ultra-low noise dominates and enable/discharge not required
Torex XC6210B112MR-G	200mA max output, 40µV_rms noise, 1.1V ±2% accuracy, no auto-discharge	Lower noise but tighter accuracy tolerance not guaranteed; lacks integrated discharge path	Selected when lowest possible noise is critical and system-level discharge can be managed externally

Compared with MCP1700T-1102E/TT and XC6210B112MR-G, the AP7341D-11FS4-7 uniquely combines 300mA drive, 1.1V precision, and integrated auto-discharge in a 1.0mm² footprint-enabling simpler, more reliable power sequencing in battery-constrained RF and sensor systems.

Availability

AP7341D-11FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, low-voltage microcontroller core supply, camera image sensor analog rails, and wireless transceiver VDDIO requiring stable component supply with tight voltage tolerance and ultra-low noise.

Supply support for AP7341D-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-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7341 series belongs to Diodes' high-PSRR, low-noise LDO product line, designed specifically for noise-sensitive analog and RF subsystems in portable electronics where board space, battery life, and signal fidelity are critical constraints.

FAQ

What is the maximum input voltage rating for AP7341D-11FS4-7?

The absolute maximum input voltage (VIN) is 6.0V per the datasheet Absolute Maximum Ratings table. Operation above 5.25V violates recommended conditions and risks permanent damage. For long-term reliability, VIN must remain within 1.7V–5.25V during normal operation, with transient spikes limited to ≤6.0V for <1µs.

Does AP7341D-11FS4-7 require an external discharge resistor?

No. The "D" suffix denotes built-in auto-discharge functionality. When EN is pulled low, an internal 30Ω N-channel MOSFET connects VOUT to GND, discharging output capacitance without external components. This eliminates leakage paths and simplifies PCB layout versus non-D variants.

Can AP7341D-11FS4-7 operate with ceramic output capacitors smaller than 1.0µF?

Yes - the device is stable with ceramic capacitors as low as 0.47µF, though 1.0µF is recommended for optimal transient response and PSRR. Capacitor ESR must remain below 100mΩ; X5R/X7R dielectrics are preferred. Avoid high-ESR tantalum or aluminum electrolytics.

How does thermal performance change with PCB copper area under the thermal pad?

Thermal resistance θ_JA drops significantly with increased copper area: 220°C/W with minimal pad vs. ~120°C/W with ≥100mm² of 1oz copper connected to GND. The datasheet recommends large copper pour tied to GND for thermal pad; leaving it floating degrades thermal performance by >30%.

AP7341D-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

AP7341D-11FS4-7 FAQ

1.How can I place an order for AP7341D-11FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341D-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 AP7341D-11FS4-7 reliable?

The price and inventory of AP7341D-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 AP7341D-11FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341D-11FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341D-11FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341D-11FS4-7?

AP7341D-11FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341D-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 AP7341D-11FS4-7?

For technical support, including AP7341D-11FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341D-11FS4-7 requirements.

6.How does Aetrix verify that AP7341D-11FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341D-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 AP7341D-11FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341D-11FS4-7?

All AP7341D-11FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341D-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 AP7341D-11FS4-7 part is unused and in its original packaging.

Return procedure for AP7341D-11FS4-7:

1.Submit a request within 90 days.

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

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