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

Diodes Incorporated AP7343D-23W5-7

Name: AP7343D-23W5-7
Brand: Diodes Incorporated
SKU: AP7343D-23W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343D-23W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343D-23W5-7.pdf

Description:: IC REG LINEAR 2.3V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343D-23W5-7 from Diodes Incorporated is a 300mA low-dropout linear regulator with fixed 2.3V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features CMOS-based architecture, integrated enable control, thermal shutdown, and short-circuit protection-designed for RF supply rails in space-constrained portable electronics.

For engineers reviewing the AP7343D-23W5-7 datasheet, AP7343D-23W5-7 pinout, AP7343D-23W5-7 application, or AP7343D-23W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.22–0.29V for 2.3V output), EN logic thresholds (0.5V low / 1.3V high), thermal resistance (179°C/W in SOT25), and discharge functionality enabled by the "D" suffix.

Technical Context

The AP7343D-23W5-7 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, current-limit circuit, and thermal shutdown. Its enable input (EN) provides precise on/off control with defined logic thresholds and <1.0µA leakage.

It delivers regulated 2.3V output across 1.7V–5.25V input range, supports 300mA continuous load, and includes built-in auto-discharge (enabled by "D" suffix) via a 30Ω N-channel switch between VOUT and GND during shutdown-critical for rapid rail collapse in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.3V ±1% - ensures stable bias for RF power amplifiers and analog sensor front-ends without external feedback.
Max Output Current	300mA - sufficient to power baseband processors, camera ISPs, or dual-band RF transceivers in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails.
Output Noise	60µVrms (10Hz–100kHz) - preserves SNR in sensitive analog signal chains like audio codecs or ADC references.
Quiescent Current	35µA typical - extends battery life in always-on subsystems such as Bluetooth LE receivers or real-time clocks.
Dropout Voltage	0.22–0.29V at 300mA (2.3V output) - enables operation from single-cell Li-ion (3.0V min) down to 2.53V under full load.
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting in modern SoC platforms.

Pinout & Package

AP7343D-23W5-7 is packaged in SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm), with pin 4 as VIN, pin 1 as VOUT, pin 2 as GND, pin 3 as EN, and pin 5 as NC. The exposed pad (EP) is thermally connected to PCB copper for enhanced heat dissipation but must not serve as sole GND connection.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 4)	Input Power Supply	Accepts 1.7–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to minimize input impedance.
VOUT (Pin 1)	Regulated Output	Delivers fixed 2.3V ±1%; connects to load and 1µF ceramic output capacitor for transient stability.
GND (Pin 2)	Power Ground Reference	Low-impedance return path; must be tied directly to PCB ground plane to avoid noise coupling into regulation loop.
EN (Pin 3)	Enable Control Input	Active-high logic: drives high (>1.3V) to enable, low (<0.5V) to disable and activate auto-discharge (30Ω path to GND).
NC (Pin 5)	No Connection	Internally unconnected; must remain floating or grounded per layout best practice-no electrical function.

Key Features

Feature	Design Value
Auto-discharge function	30Ω internal N-channel switch discharges VOUT to GND when EN = low-prevents back-powering and ensures clean power sequencing.
High PSRR at 1kHz	75dB rejection of ripple from upstream switching regulators-enables co-location with noisy DC/DC stages on compact PCBs.
Ultra-low noise output	60µVrms broadband noise-meets stringent requirements for RF synthesizer VCO supplies and precision ADC reference buffers.
Thermal shutdown + hysteresis	Triggers at +150°C with +20°C hysteresis-protects against sustained overload while allowing safe recovery after cooling.
Lead-free & green compliance	Fully RoHS 3 compliant, halogen- and antimony-free (<900ppm Br+Cl, <1000ppm Sb)-meets global environmental and automotive standards.

Applications

RF Power Amplifier Supply

Camera Image Signal Processor (ISP)

Use Scenario: Powers 2.3V bias rail for LTE/5G PA modules in smartphones where supply noise directly impacts EVM and ACLR.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO providing clean, sequenced VCC for PA driver stage.

Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion; auto-discharge ensures fast PA turn-off during sleep mode.

Use Scenario: Supplies 2.3V core voltage to ISP in mobile cameras requiring stable clock domain referencing and minimal thermal drift.

IC Role / Device Role / Timing Role: Precision voltage source maintaining ±1% output accuracy over -40°C to +85°C ambient.

Use Value: ±30ppm/°C tempco and ±1% initial accuracy preserve image white balance calibration; 35µA IQ extends standby time.

Wireless Adapter Baseband Core

Portable Media Player Audio Codec

Use Scenario: Regulates 2.3V supply for Wi-Fi/BT SoC baseband logic in USB dongles and IoT edge nodes.

IC Role / Device Role / Timing Role: Enable-controlled LDO enabling dynamic power gating of baseband subsystems.

Use Value: EN-compatible 1.3V logic threshold integrates directly with 1.8V I/O domains; 0.22V dropout allows operation from shared 2.5V system rail.

Use Scenario: Delivers ultra-low-noise 2.3V bias to stereo audio DAC/ADC in portable media players.

IC Role / Device Role / Timing Role: Low-ESR-stable LDO supporting ceramic output caps to minimize board area and cost.

Use Value: 60µVrms noise prevents audible hiss; 179°C/W θ_JA in SOT25 permits >200mA continuous load without heatsinking.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703-2302E/TO	2.3V fixed, ±2% accuracy, 6µA IQ, no enable, no discharge	Lacks EN control and auto-discharge-requires external MOSFET for sequencing; higher accuracy tolerance affects RF bias stability	Select only if enable/discharge is unnecessary and ultra-low IQ dominates design priority.
Torex XC6210B232MR-G	2.3V fixed, ±2% accuracy, 35µA IQ, EN pin, no discharge, 250mA max	Lower current rating limits use in high-drive ISP or PA applications; identical noise/PSRR specs but no discharge path	Choose when 250mA suffices and footprint compatibility with SOT25 is required; verify thermal margin at full load.

Compared with MCP1703-2302E/TO and XC6210B232MR-G, AP7343D-23W5-7 uniquely combines 300mA drive, ±1% accuracy, EN control, and integrated discharge-making it optimal for RF and imaging subsystems demanding tight regulation, fast sequencing, and noise immunity.

Availability

AP7343D-23W5-7 is available at Aetrix Electronics and suitable for RF power amplifier supply, camera ISP biasing, wireless adapter baseband regulation, and portable media player audio codec powering requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for AP7343D-23W5-7 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 ICs for power management, signal integrity, and connectivity applications.

The AP7343 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for low-noise, high-PSRR power delivery in battery-powered portable and wireless communication devices.

FAQ

What is the purpose of the NC pin (Pin 5) in the SOT25 package?

Pin 5 is a no-connect terminal with no internal bond wire or circuit connection. It must remain electrically floating or be grounded per PCB layout best practices to avoid parasitic coupling. It serves no functional role in regulation, enable, or thermal performance-its presence is solely for mechanical symmetry and package standardization.

Does AP7343D-23W5-7 require an external discharge resistor?

No. The "D" suffix indicates integrated auto-discharge functionality: when EN is pulled low, a 30Ω internal N-channel MOSFET actively discharges VOUT to GND. This eliminates need for external resistors, reduces BOM count, and ensures consistent discharge timing across temperature and unit variance-critical for reliable power sequencing.

Can AP7343D-23W5-7 operate with a 1.7V input when delivering 2.3V output?

No. A 1.7V input is below the minimum required headroom. At 2.3V output, the dropout voltage ranges from 0.22V to 0.29V depending on load and temperature. Therefore, minimum valid input is 2.3V + 0.22V = 2.52V. Operation below this violates specification and causes output collapse or regulation loss.

How does thermal performance differ between SOT25 and X2-DFN1010-4 packages?

SOT25 offers lower junction-to-ambient thermal resistance (179°C/W vs. 237°C/W for X2-DFN1010-4), enabling higher continuous current capability without derating. However, X2-DFN1010-4 provides superior junction-to-board conduction (85.7°C/W vs. 79.2°C/W) when using large copper pads-making it preferable for thermally dense layouts with aggressive board-level heat spreading.

AP7343D-23W5-7 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):: 2.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.34V @ 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-23W5-7 FAQ

1.How can I place an order for AP7343D-23W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343D-23W5-7 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-23W5-7 reliable?

The price and inventory of AP7343D-23W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-23W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343D-23W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-23W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343D-23W5-7?

AP7343D-23W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343D-23W5-7 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-23W5-7?

For technical support, including AP7343D-23W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-23W5-7 requirements.

6.How does Aetrix verify that AP7343D-23W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343D-23W5-7 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-23W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343D-23W5-7?

All AP7343D-23W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-23W5-7, 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-23W5-7 part is unused and in its original packaging.

Return procedure for AP7343D-23W5-7:

1.Submit a request within 90 days.

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

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