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

Diodes Incorporated AP7343DQ-28W5-7

Name: AP7343DQ-28W5-7
Brand: Diodes Incorporated
SKU: AP7343DQ-28W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343DQ-28W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343DQ-28W5-7.pdf

Description:: IC REG LINEAR 2.8V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343DQ-28W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 2.8V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, and short-circuit protection, and is designed for noise-sensitive power rails in ADAS camera modules and infotainment RF supplies.

For engineers reviewing the AP7343DQ-28W5-7 datasheet, AP7343DQ-28W5-7 pinout, AP7343DQ-28W5-7 application, or AP7343DQ-28W5-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θ_JA = 179°C/W), discharge functionality, and guaranteed 300mA output across –40°C to +125°C ambient.

Technical Context

The AP7343DQ-28W5-7 integrates a CMOS-based error amplifier, voltage reference, current-limit circuit, and active discharge path activated during shutdown. Its architecture supports fast load transient response (<100µs recovery for 1mA↔300mA steps with 4.7µF C_OUT) and stable operation with ceramic capacitors as low as 1µF.

It operates across 1.7V–5.25V input range and delivers 2.8V ±1% output with dropout as low as 0.26V at 300mA (typical). The EN pin accepts logic-level control (V_IL ≤ 0.5V, V_IH ≥ 1.3V), and internal thermal shutdown triggers at +150°C with +20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% at +25°C; maintains regulation over –40°C to +125°C ambient.
Max Output Current	300mA continuous; foldback current limit activates at ~55mA during V_OUT short to GND.
PSRR	75dB at 1kHz; suppresses ripple from upstream switching regulators in POL applications.
Output Noise	60µV_rms (10Hz–100kHz); enables clean biasing of RF ICs and high-resolution ADCs.
Quiescent Current	35µA typical; reduces standby power in always-on automotive subsystems.
Dropout Voltage	0.26V typ. at 300mA; allows operation from 3.06V input while sustaining 2.8V output.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V; compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

AP7343DQ-28W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for thermal dissipation in space-constrained automotive PCBs. The exposed pad is not electrically connected but must be tied to GND via large copper area for thermal management.

Pin	Circuit Role	Design Meaning
1	VIN	Main power input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin.
2	EN	Active-high enable; must be driven to avoid floating; pulls regulator into <1µA shutdown when low.
3	GND	Analog/digital ground reference; connects directly to PCB ground plane for noise immunity.
4	VOUT	Regulated 2.8V output; requires ≥1µF ceramic capacitor at pin for stability and transient response.
5	NC	No-connect terminal; recommended to tie to GND to maximize thermal copper area on PCB.

Key Features

Feature	Design Value
Automotive Qualification	AEC-Q100 Grade 1 (–40°C to +125°C), PPAP-capable, manufactured in IATF 16949 facilities.
Active Output Discharge	Internal NMOS discharges V_OUT to GND within 100µs after EN deactivation-critical for sequencing in multi-rail systems.
Low-Noise Regulation	60µV_rms noise floor enables direct powering of RF transceivers and image sensors without additional filtering.
High PSRR at Low Frequencies	75dB rejection at 1kHz mitigates switching noise from buck converters feeding VIN.
Wide Input Range	1.7V–5.25V operation supports direct connection to 3.3V or 5V rails and battery-backed systems.

Applications

Infotainment Power Supplies

Automotive RF Supplies

Use Scenario: Powering audio DSPs and display controllers in head units with strict EMI limits.

IC Role / Device Role / Timing Role: Primary 2.8V LDO delivering clean, sequenced power with discharge for safe state transitions.

Use Value: Eliminates need for external discharge FET and reduces BOM count while meeting CISPR 25 Class 5 emission requirements.

Use Scenario: Biasing LTE/V2X transceivers and GNSS front-ends in telematics control units.

IC Role / Device Role / Timing Role: Low-noise local regulator isolating sensitive RF circuitry from noisy digital domains.

Use Value: 60µV_rms noise and 75dB PSRR prevent reciprocal mixing and maintain receiver sensitivity below –105dBm.

Cameras

Automotive POL in ADAS

Use Scenario: Supplying image signal processors (ISPs) and CMOS image sensors in surround-view cameras.

IC Role / Device Role / Timing Role: Point-of-load regulator providing stable 2.8V core voltage with fast transient response to pixel clock bursts.

Use Value: Load transient recovery <100µs (with 4.7µF C_OUT) prevents frame corruption during high-speed exposure sequences.

Use Scenario: Powering radar SoCs and sensor fusion MCUs in forward collision warning systems.

IC Role / Device Role / Timing Role: Automotive-compliant LDO supplying 2.8V to safety-critical processing cores with thermal fault reporting.

Use Value: +150°C thermal shutdown with +20°C hysteresis ensures fail-safe operation under hood temperature excursions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7343Q-28W5-7	No internal discharge path; 1µA standby current vs. 35µA active quiescent.	Suitable where output hold time is acceptable and sequencing simplicity is prioritized over discharge speed.	Select when system-level discharge is handled externally or not required.
TI TPS78028QDRVRQ1	200mA max output, 50µV_rms noise, 65dB PSRR at 1kHz, 0.75V dropout at 200mA.	Lower current rating and reduced PSRR limit use in high-dynamic-load RF or camera applications.	Choose only if 200mA suffices and footprint compatibility with WSON-6 is confirmed.

Compared with AP7343Q-28W5-7, the AP7343DQ-28W5-7 adds critical discharge functionality for deterministic power-down sequencing, while the TPS78028QDRVRQ1 trades current capability and PSRR for ultra-low quiescent current-making it unsuitable for 300mA ADAS loads despite shared automotive qualification.

Availability

AP7343DQ-28W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics RF power supplies requiring stable component supply, AEC-Q100 compliance, and production traceability.

Supply support for AP7343DQ-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.

The AP7343Q/DQ series targets automotive power management, delivering high-PSRR, low-noise LDOs qualified to AEC-Q100 Grade 1 for use in ADAS, infotainment, and body electronics.

FAQ

What is the function of the NC pin on AP7343DQ-28W5-7?

The NC (No Connect) pin is internally unconnected but serves a mechanical and thermal role. It must be tied to GND on the PCB to maximize copper area for heat dissipation. This improves thermal resistance (θ_JA) by up to 15% compared to leaving it floating, especially critical in high-ambient automotive environments.

Does AP7343DQ-28W5-7 require an external discharge FET?

No. Unlike non-discharge variants (e.g., AP7343Q-28W5-7), the 'D' suffix indicates integrated discharge functionality. An internal NMOS actively pulls V_OUT to GND within 100µs after EN is pulled low, eliminating the need for external components and reducing board area and cost in multi-rail automotive systems.

Can AP7343DQ-28W5-7 operate with a 1.8V input supply?

No. The minimum input voltage is 1.7V, but dropout voltage at 300mA is 0.26V (typical). To sustain 2.8V output, VIN must be ≥3.06V. At 1.8V input, the device enters dropout and cannot regulate-output collapses to ~1.5V. Use only with VIN ≥3.1V for full 300mA capability.

How does the thermal shutdown behavior impact system reliability?

Thermal shutdown activates at +150°C junction temperature with +20°C hysteresis, forcing automatic recovery at +130°C. This protects against sustained overload or poor heatsinking. In automotive under-hood designs, the SOT25 package's θ_JA of 179°C/W requires ≥200mm² of 2oz copper connected to the exposed pad to maintain TJ <125°C at 300mA and 85°C ambient.

AP7343DQ-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):: 0.32V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 60 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7343DQ-28W5-7 FAQ

1.How can I place an order for AP7343DQ-28W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343DQ-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 AP7343DQ-28W5-7 reliable?

The price and inventory of AP7343DQ-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 AP7343DQ-28W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343DQ-28W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-28W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343DQ-28W5-7?

AP7343DQ-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343DQ-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 AP7343DQ-28W5-7?

For technical support, including AP7343DQ-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-28W5-7 requirements.

6.How does Aetrix verify that AP7343DQ-28W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343DQ-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 AP7343DQ-28W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343DQ-28W5-7?

All AP7343DQ-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-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 AP7343DQ-28W5-7 part is unused and in its original packaging.

Return procedure for AP7343DQ-28W5-7:

1.Submit a request within 90 days.

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

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