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

Diodes Incorporated AP7341D-12FS4-7

Name: AP7341D-12FS4-7
Brand: Diodes Incorporated
SKU: AP7341D-12FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341D-12FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341D-12FS4-7.pdf

Description:: IC REG LINEAR 1.2V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341D-12FS4-7 from Diodes Incorporated is a 300mA low-dropout linear regulator with fixed 1.2V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and integrated auto-discharge functionality - designed for powering RF circuitry and precision analog blocks in space-constrained portable devices.

For engineers reviewing the AP7341D-12FS4-7 datasheet, AP7341D-12FS4-7 pinout, AP7341D-12FS4-7 application, or AP7341D-12FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (max 0.62V for 1.2V output), EN logic thresholds (0.5V low / 1.3V high), thermal pad grounding requirements, and compatibility with 1µF ceramic output capacitors.

Technical Context

The AP7341D-12FS4-7 uses a CMOS-based LDO architecture with internal voltage reference, error amplifier, and current-limit circuitry. Its enable input controls NMOS pass transistor conduction, while the built-in discharge path (enabled by 'D' suffix) actively pulls VOUT to GND during shutdown - critical for systems requiring rapid rail collapse and leakage minimization.

It operates across 1.7V–5.25V input range with guaranteed 300mA output under -40°C to +85°C ambient conditions. The X2-DFN1010-4 package integrates an exposed thermal pad optimized for PCB copper area connection to GND, enabling 400mW power dissipation on JEDEC High-K board.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2V ±1% (25°C), ±1.5% (-40°C to +85°C) - ensures stable core bias for low-voltage logic and RF ICs
Max Output Current	300mA continuous - supports single-rail powering of baseband processors or sensor interfaces
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails
Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in ADC reference or PLL supply applications
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes
Dropout Voltage	0.62V max at 150mA (1.2V output) - enables operation from single-cell Li-ion or 1.8V system rails
Enable Thresholds	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO without level-shifting

Pinout & Package

The AP7341D-12FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with wettable flank leads and an exposed thermal pad (Pin 5) intended for GND connection via PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
1 - VOUT	Regulated power output	Delivers clean 1.2V; requires 1µF ceramic capacitor placed within 2mm of pin for stability
2 - GND	Power ground reference	Primary return path; must be connected to low-impedance ground plane adjacent to thermal pad
3 - EN	Active-high enable input	Pulled high to enable regulation; floating prohibited - tie to VIN if unused
4 - VIN	Unregulated input supply	Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling capacitor placed <1mm from pin

Key Features

Feature	Design Value
Auto-discharge function	30Ω on-resistance between VOUT and GND during shutdown - discharges load capacitance in <1ms for fast state transitions
High PSRR at low frequency	75dB @ 1kHz - rejects ripple from buck converter switching frequencies and their harmonics
Ultra-low noise output	60µV_rms broadband noise - avoids modulation artifacts in RF front-end and audio codec supplies
Low quiescent current	35µA operating / 0.01µA shutdown - enables >1-year battery life in IoT edge sensors
Thermal protection	Internal foldback current limit and thermal shutdown - prevents damage during sustained overload or poor PCB heatsinking

Applications

RF Power Amplifier Bias

Low-Power Microcontroller Core Supply

Use Scenario: Providing stable 1.2V bias to GaAs or SiGe PA driver stages in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering clean V_CC to minimize AM-to-PM distortion and EVM degradation.

Use Value: 60µV_rms noise and 75dB PSRR prevent LO pulling and spectral regrowth under dynamic transmit load.

Use Scenario: Powering ARM Cortex-M0+ core and SRAM in wearable health monitors with coin-cell batteries.

IC Role / Device Role / Timing Role: Primary voltage regulator enabling deep-sleep mode with sub-1µA system leakage.

Use Value: 35µA I_Q and 0.62V dropout extend runtime by 22% vs. legacy 1.8V LDOs when Vin drops to 1.82V.

Camera Image Sensor Analog Rail

Wireless SoC I/O Domain Supply

Use Scenario: Supplying 1.2V to CIS analog pixel array and column ADC in smartphone multi-camera modules.

IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating sensitive analog imaging path from digital switching noise.

Use Value: ±1% output accuracy maintains consistent pixel response; 100kHz PSRR >60dB suppresses digital coupling.

Use Scenario: Regulating 1.2V I/O supply for Bluetooth 5.0 or Wi-Fi 6 companion chips interfacing with application processors.

IC Role / Device Role / Timing Role: Enable-controlled rail ensuring synchronized power-up/down with host processor reset sequence.

Use Value: EN pin compatibility with 1.8V GPIO and auto-discharge prevent bus contention during hot-plug events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1202E/TT	250mA output, 6µA I_Q, no EN pin, no discharge	Limited to ultra-low-power always-on sensors; lacks enable sequencing and rail collapse	Select only when minimal I_Q dominates over output current and control flexibility
Torex XC6210B122MR-G	200mA output, 1.0µA I_Q, 1.2V ±2%, no discharge	Suitable for static bias rails where shutdown behavior is irrelevant	Prefer for cost-sensitive, non-sequenced applications with <200mA load and no fast discharge requirement

Compared with MCP1700T-1202E/TT and XC6210B122MR-G, the AP7341D-12FS4-7 uniquely balances 300mA drive capability, 35µA quiescent current, precise ±1% accuracy, and integrated discharge - making it optimal for dynamically controlled, noise-sensitive, medium-current portable subsystems.

Availability

AP7341D-12FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, low-power microcontroller core supply, camera image sensor analog rails, and wireless SoC I/O domain regulation requiring stable component supply across consumer, industrial, and medical portable designs.

Supply support for AP7341D-12FS4-7 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 industrial, automotive, and consumer markets.

The AP7341 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics where compact size, fast transient response, and rail collapse control are mandatory.

FAQ

What is the minimum input voltage required for AP7341D-12FS4-7 to regulate 1.2V output at 300mA?

The minimum input voltage is determined by dropout: at 300mA and 1.2V output, max dropout is 0.65V (per Electrical Characteristics table). Thus, VIN must be ≥1.85V to maintain regulation. Below this, output voltage collapses linearly with input.

Can the thermal pad of AP7341D-12FS4-7 be left unconnected?

No. The exposed thermal pad (Pin 5) must be soldered to a PCB copper area connected to GND. Leaving it unconnected degrades thermal performance, reduces safe operating area, and risks thermal shutdown at >150mA loads. Minimum recommended copper area is 25mm² per JEDEC High-K board spec.

Does AP7341D-12FS4-7 require an external resistor network to set output voltage?

No. The '12' in the part number denotes factory-trimmed fixed 1.2V output. Internal resistor network is laser-trimmed during test; no external components are needed for voltage setting. Only input/output capacitors (CIN ≥0.47µF, COUT ≥1.0µF ceramic) are required for stability.

How does the auto-discharge feature behave during EN pin assertion?

When EN is pulled low, the internal 30Ω NMOS switch connects VOUT to GND, discharging external load capacitance. Discharge time is ~C_LOAD × 30Ω (e.g., 10µF → ~300µs). When EN returns high, discharge switch opens before regulation resumes - preventing shoot-through or inrush current.

AP7341D-12FS4-7 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):: 1.2V

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

AP7341D-12FS4-7 FAQ

1.How can I place an order for AP7341D-12FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341D-12FS4-7 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-12FS4-7 reliable?

The price and inventory of AP7341D-12FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341D-12FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341D-12FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341D-12FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341D-12FS4-7?

AP7341D-12FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341D-12FS4-7 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-12FS4-7?

For technical support, including AP7341D-12FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341D-12FS4-7 requirements.

6.How does Aetrix verify that AP7341D-12FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341D-12FS4-7 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-12FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341D-12FS4-7?

All AP7341D-12FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341D-12FS4-7, 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-12FS4-7 part is unused and in its original packaging.

Return procedure for AP7341D-12FS4-7:

1.Submit a request within 90 days.

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

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