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

Diodes Incorporated AP7343D-14W5-7

Name: AP7343D-14W5-7
Brand: Diodes Incorporated
SKU: AP7343D-14W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343D-14W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343D-14W5-7.pdf

Description:: IC REG LINEAR 1.4V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343D-14W5-7 from Diodes Incorporated is a 300mA, 1.4V fixed-output low-dropout linear regulator with high PSRR (75dB at 1kHz), ultra-low output noise (60µV_rms, 10Hz–100kHz), ±1% output voltage accuracy, and enable-controlled shutdown. Built on CMOS process, it delivers stable power to RF supplies and camera modules in space-constrained portable devices using its SOT25 package.

For engineers reviewing the AP7343D-14W5-7 datasheet, AP7343D-14W5-7 pinout, AP7343D-14W5-7 application, or AP7343D-14W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.39–0.60V depending on V_OUT), thermal shutdown threshold (+150°C), EN input logic thresholds (0.5V_IL/1.3V_IH), and compatibility with 1µF ceramic input/output capacitors.

Technical Context

The AP7343D-14W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and thermal shutdown protection within a single CMOS LDO architecture. Its enable input (EN) provides precise on/off control with <1.0µA leakage and defined logic thresholds, supporting low-power sequencing in battery-operated systems.

It features built-in discharge functionality (denoted by "D" suffix), actively pulling V_OUT to GND during shutdown via a 30Ω internal N-channel MOSFET - critical for preventing back-powering in multi-rail systems. The device maintains stability with minimal 1µF ceramic capacitors and exhibits robust line/load transient response across –40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.4V ±1% - ensures tight regulation for core voltage of low-power RF ICs and image sensors.
Max Output Current	300mA - supports moderate-current loads such as Wi-Fi/BT transceivers and CMOS image sensor analog blocks.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy supply rails.
Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in sensitive analog front-ends like camera ISP power domains.
Quiescent Current	35µA typical - extends battery life in always-on subsystems (e.g., wake-on-RF, sensor hubs).
Dropout Voltage	0.39V @ 300mA (1.4V output, SOT25) - enables operation from single-cell Li-ion (3.0V min) down to ~1.8V input.
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting.
Thermal Shutdown	+150°C with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design.

Pinout & Package

SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed thermal pad (EP). Optimized for compact layout and efficient heat dissipation when EP is connected to GND plane.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Power Input	Accepts 1.7V–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin.
2 - GND	Ground Reference	Primary return path for load current and internal circuitry; must connect directly to low-impedance ground plane.
3 - EN	Enable Control	Active-high logic input; floating state prohibited - tie to VIN if always-on operation required.
4 - VOUT	Regulated Output	Delivers 1.4V ±1% to load; includes internal discharge FET (30Ω) to rapidly deplete output capacitance during shutdown.
5 - EP	Exposed Thermal Pad	Not electrically functional; soldered to large copper area tied to GND for thermal relief (R_θJA = 179°C/W).

Key Features

Feature	Design Value
Ultra-Low Output Noise	60µV_rms (10Hz–100kHz) - eliminates need for additional LC filtering in noise-sensitive analog power domains.
Integrated Output Discharge	30Ω internal N-FET - discharges V_OUT capacitor within microseconds upon EN deactivation, preventing backfeed into powered-down circuits.
High PSRR at Low Frequencies	75dB @ 1kHz - effectively rejects ripple from buck converter switching frequencies and their harmonics.
Low Quiescent Current	35µA typical - reduces standby power loss in battery-backed real-time clocks and sensor interfaces.
Wide Input Voltage Range	1.7V–5.25V - supports direct connection to single-cell Li-ion, USB VBUS, or intermediate rail outputs.
Stable with Small Capacitors	Works with ≥1µF ceramic C_IN/C_OUT - simplifies layout and lowers BOM cost vs. traditional LDOs requiring bulk electrolytics.

Applications

RF Power Supply

CMOS Image Sensor Core

Use Scenario: Providing clean bias to 2.4GHz Wi-Fi transceiver RF front-end and PLL VCO circuitry.

IC Role / Device Role / Timing Role: Low-noise post-regulator for RF IC analog supply rail, rejecting switching noise from system PMIC.

Use Value: 60µV_rms noise and 75dB PSRR prevent phase noise degradation and EVM deterioration in transmit paths.

Use Scenario: Powering analog core and ADC reference of 12MP mobile camera sensor.

IC Role / Device Role / Timing Role: Precision 1.4V LDO delivering stable voltage to image sensor pixel array and column ADC.

Use Value: ±1% accuracy and low thermal drift (±30ppm/°C) ensure consistent analog gain and reduced fixed-pattern noise.

Portable Media Player Audio Codec

Wireless Adapter Baseband

Use Scenario: Supplying DAC and headphone amplifier in Bluetooth audio streaming device.

IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO powering audio signal chain to minimize hiss and maximize SNR.

Use Value: 35µA I_Q extends playback time; 60µV_rms noise avoids audible artifacts in 24-bit audio output.

Use Scenario: Regulating baseband processor I/O and memory interface voltage in mini-PCIe wireless adapter.

IC Role / Device Role / Timing Role: Enable-controlled 1.4V supply enabling fast power cycling during link sleep states (e.g., PCIe ASPM L1).

Use Value: Active discharge (30Ω FET) clears residual charge before re-enabling, preventing timing violations on I/O power-up sequencing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361D-14SAG-7	Higher output current (600mA), same 1.4V output, SOT25 package, identical discharge function and PSRR/noise specs.	Better suited for higher-current digital loads (e.g., FPGA I/O banks) where 300mA margin is insufficient.	Select when future-proofing for increased load or needing headroom for peak current surges beyond 300mA.
MCP1700-1402E/TO	Lower I_Q (2.0µA), no discharge FET, 250mA max output, TO-92 package - lacks thermal performance and active discharge.	Only viable for ultra-low-power always-on monitoring nodes where discharge is unnecessary and board space allows through-hole mounting.	Choose only for cost-sensitive, non-discharge, sub-250mA applications where thermal constraints are minimal and TO-92 is acceptable.

Compared with AP7343D-14W5-7, AP7361D-14SAG-7 offers double the current capacity without sacrificing noise or PSRR, while MCP1700-1402E/TO trades discharge capability and thermal efficiency for ultra-low quiescent current in legacy through-hole designs.

Availability

AP7343D-14W5-7 is available at Aetrix Electronics and suitable for RF power supplies, CMOS image sensor cores, portable media player audio codecs, and wireless adapter baseband circuits requiring stable component supply, long-term manufacturability, and automotive-grade traceability (via AP7343Q variant).

Supply support for AP7343D-14W5-7 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 company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AP7343 series targets portable and battery-powered electronics, delivering high PSRR, low noise, and enable/discharge functionality in ultra-small packages for next-generation handheld communication equipment.

FAQ

What is the purpose of the exposed pad (EP) on the SOT25 package?

The exposed pad (EP) is a thermal pad-not an electrical terminal-designed to improve heat transfer from the die to the PCB. It must be soldered to a large copper area connected to GND for optimal thermal performance (R_θJA = 179°C/W). Using it as a standalone GND electrode is not recommended; instead, integrate it into the ground plane for both thermal and electrical integrity.

Does AP7343D-14W5-7 require an external pull-up resistor on the EN pin?

No external pull-up is required. The EN pin has no internal pull-up; however, it must never be left floating. For always-on operation, connect EN directly to VIN. For controlled enable/disable, drive it with a GPIO that meets V_IH ≥ 1.3V and V_IL ≤ 0.5V, with leakage <±1.0µA confirmed in the datasheet.

How does the internal discharge FET affect output capacitor selection?

The 30Ω internal discharge FET rapidly pulls V_OUT to GND after EN deactivation, eliminating need for external bleed resistors. This allows use of smaller output capacitors (≥1µF ceramic) without compromising safe discharge time, reducing board area and cost versus non-discharge LDOs requiring RC networks.

Can AP7343D-14W5-7 operate with input voltage below 1.7V?

No. The absolute minimum input voltage is 1.7V per datasheet specifications. Operation below this violates recommended conditions and may cause dropout, regulation failure, or undefined behavior. For sub-1.7V inputs, consider alternative regulators such as the AP7363 series or specialized ultra-low-V_IN LDOs.

AP7343D-14W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

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):: 1.4V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.44V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 60 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:: SOT-25

AP7343D-14W5-7 FAQ

1.How can I place an order for AP7343D-14W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343D-14W5-7 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 AP7343D-14W5-7 reliable?

The price and inventory of AP7343D-14W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-14W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343D-14W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-14W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343D-14W5-7?

AP7343D-14W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343D-14W5-7 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 AP7343D-14W5-7?

For technical support, including AP7343D-14W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-14W5-7 requirements.

6.How does Aetrix verify that AP7343D-14W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343D-14W5-7 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 AP7343D-14W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343D-14W5-7?

All AP7343D-14W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-14W5-7, 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 AP7343D-14W5-7 part is unused and in its original packaging.

Return procedure for AP7343D-14W5-7:

1.Submit a request within 90 days.

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

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