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

Diodes Incorporated AP7343-28W5-7

Name: AP7343-28W5-7
Brand: Diodes Incorporated
SKU: AP7343-28W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343-28W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343-28W5-7.pdf

Description:: IC REG LINEAR 2.8V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Inventory:2,920

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Product details

Overview

AP7343-28W5-7 from Diodes Incorporated is a 300mA, 2.8V fixed-output low-dropout linear regulator (LDO) with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). Built on CMOS process, it features enable control, thermal shutdown, and short-circuit protection - designed for RF supply rails in compact portable electronics.

For engineers reviewing the AP7343-28W5-7 datasheet, AP7343-28W5-7 pinout, AP7343-28W5-7 application, or AP7343-28W5-7 equivalent, key selection criteria include its 1.7V–5.25V input range, 35µA quiescent current, SOT25 package footprint, and guaranteed 300mA output under low dropout conditions (≤390mV at 300mA, V_OUT=2.8V).

Technical Context

The AP7343-28W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor - enabling stable regulation with fast line/load transient response. Its EN pin provides precise on/off control with defined logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.3V), and internal thermal shutdown activates at +150°C with +20°C hysteresis.

It operates without external compensation, supports ceramic output capacitors as low as 1µF, and delivers high PSRR across frequency (≥75dB @ 1kHz, >60dB @ 100kHz) due to optimized internal feedback loop design - critical for noise-sensitive analog and RF subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% at +25°C; ensures stable biasing for RF power amplifiers and camera sensor analog blocks.
Max Output Current	300mA continuous; sufficient to power dual-band RF transceivers or high-resolution image sensors.
Dropout Voltage	≤390mV at 300mA (SOT25); enables operation from single-cell Li-ion (3.0V min) with margin.
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding digital cores.
Output Noise	60µV_rms (10Hz–100kHz); meets low-noise requirements for ADC references and PLL VCO supplies.
I_Q	35µA typical; extends battery life in always-on sensor or standby communication modules.
Enable Threshold	V_{EN_H} ≥ 1.3V, V_{EN_L} ≤ 0.5V; compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

AP7343-28W5-7 is packaged in SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm), featuring exposed pad for thermal enhancement. Pin 1 = VIN, Pin 2 = GND, Pin 3 = EN, Pin 4 = VOUT, Pin 5 = NC (no connection).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (VIN)	Power Input	Accepts 1.7V–5.25V input; requires local 0.47µF ceramic decoupling capacitor placed adjacent to pin.
Pin 2 (GND)	Ground Reference	Primary return path for load current and internal circuits; must connect to low-impedance PCB ground plane.
Pin 3 (EN)	Enable Control	Active-high logic input; floating state prohibited - tie to VIN if always-on operation required.
Pin 4 (VOUT)	Regulated Output	Delivers 2.8V ±1%; requires 1µF ceramic output capacitor placed within 2mm of pin and GND.
Pin 5 (NC)	No Connection	Internally unconnected; may be left floating or tied to GND for mechanical stability - no electrical function.

Key Features

Feature	Design Value
High PSRR	75dB at 1kHz and >60dB up to 100kHz - maintains clean supply under noisy system conditions.
Ultra-Low Noise	60µV_rms (10Hz–100kHz) - avoids modulation artifacts in RF front-end and audio codec supplies.
Low Quiescent Current	35µA typical - enables multi-week battery runtime in IoT sensor nodes with periodic wake-up.
Thermal Protection	+150°C shutdown with +20°C hysteresis - prevents damage during sustained overload or poor heatsinking.
Short-Circuit Limit	~60mA fold-back current limit - protects device and upstream source during VOUT-to-GND faults.

Applications

RF Power Amplifier Supply

Camera Image Sensor Bias

Use Scenario: Providing clean, stable 2.8V bias to LTE/5G PA modules in smartphones.

IC Role / Device Role / Timing Role: Primary LDO delivering regulated V_{CC_PA} with minimal ripple-induced spectral regrowth.

Use Value: 75dB PSRR suppresses DC/DC switching noise, preserving EVM and ACLR performance.

Use Scenario: Powering analog pixel array and column ADC in mobile camera modules.

IC Role / Device Role / Timing Role: Low-noise voltage source for image sensor analog core and reference buffers.

Use Value: 60µV_rms noise prevents fixed-pattern noise and SNR degradation in low-light capture.

Wireless Communication SoC Core

Portable Media Player Audio Codec

Use Scenario: Supplying I/O or auxiliary domain of Bluetooth/Wi-Fi SoCs in wearables.

IC Role / Device Role / Timing Role: Enable-controlled LDO powering interface logic and PHY layers.

Use Value: 35µA I_Q and fast enable/disable reduce system-level standby power by >40% vs. legacy LDOs.

Use Scenario: Delivering 2.8V to stereo audio DAC and headphone driver in DAPs.

IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator for analog audio signal chain.

Use Value: <0.01% THD+N contribution ensures fidelity preservation in high-resolution playback.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2802E/TO	250mA max output, 6µV_rms noise (10Hz–100kHz), no enable pin, TO-92 package.	Lacks enable control and thermal shutdown; unsuitable for dynamic power sequencing or high-reliability designs.	Select only for cost-sensitive, low-current, always-on applications where board space and feature set permit.
Torex XC6210B282MR-G	300mA output, 2.8V ±2%, 40µA I_Q, SOT-25 package, but 65dB PSRR @ 1kHz.	Lower PSRR reduces noise rejection in mixed-signal systems with aggressive DC/DC switching.	Prefer when ultra-low I_Q is primary requirement and PSRR >70dB is not mandatory.

Compared with MCP1700-2802E/TO and XC6210B282MR-G, AP7343-28W5-7 uniquely combines 300mA drive, ±1% accuracy, 75dB PSRR, and enable functionality in SOT25 - making it optimal for RF and imaging subsystems demanding both precision and noise immunity.

Availability

AP7343-28W5-7 is available at Aetrix Electronics and suitable for RF power amplifier supply, camera image sensor bias, wireless communication SoC core, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7343-28W5-7 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, with emphasis on power management, signal integrity, and connectivity solutions for consumer, industrial, and automotive markets.

The AP7343 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for noise-sensitive portable electronics - prioritizing PSRR, output accuracy, and ultra-low quiescent current in miniature packages.

FAQ

What is the minimum input voltage required for AP7343-28W5-7 to maintain regulation at full 300mA load?

The minimum input voltage is determined by dropout: at 300mA and V_OUT=2.8V, max dropout is 0.39V (SOT25), so VIN must be ≥3.19V. This ensures regulation across temperature (-40°C to +85°C) and line/load variations per datasheet specifications.

Can AP7343-28W5-7 be used with a 1µF ceramic output capacitor?

Yes - the AP7343-28W5-7 is explicitly characterized and stable with 1µF ceramic output capacitors (X5R/X7R, 0402 or 0603). Layout best practice requires placing it within 2mm of VOUT and GND pins, with low-inductance grounding to ensure transient response and phase margin.

Does AP7343-28W5-7 include reverse-current protection?

No - the AP7343-28W5-7 does not integrate reverse-current blocking. If VOUT exceeds VIN (e.g., during hot-swap or backup supply scenarios), current can flow backward through the pass transistor. External protection (e.g., series Schottky diode) is required in such architectures.

Is the exposed pad on the SOT25 package electrically connected?

No - the exposed pad on AP7343-28W5-7's SOT25 package is thermally conductive only and not internally connected to any circuit node. It should be soldered to a large copper pour tied to GND for optimal thermal dissipation, but must not serve as the sole GND connection point.

AP7343-28W5-7 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):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 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

AP7343-28W5-7 FAQ

1.How can I place an order for AP7343-28W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343-28W5-7 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 AP7343-28W5-7 reliable?

The price and inventory of AP7343-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-28W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343-28W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-28W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343-28W5-7?

AP7343-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343-28W5-7 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 AP7343-28W5-7?

For technical support, including AP7343-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-28W5-7 requirements.

6.How does Aetrix verify that AP7343-28W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343-28W5-7 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 AP7343-28W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343-28W5-7?

All AP7343-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-28W5-7, 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 AP7343-28W5-7 part is unused and in its original packaging.

Return procedure for AP7343-28W5-7:

1.Submit a request within 90 days.

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

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