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

Diodes Incorporated AP7343-285W5-7

Name: AP7343-285W5-7
Brand: Diodes Incorporated
SKU: AP7343-285W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343-285W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343-285W5-7.pdf

Description:: IC REG LINEAR 2.85V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343-285W5-7 from Diodes Incorporated is a 300mA, 2.85V fixed-output low-dropout linear regulator (LDO) with high PSRR (75dB at 1kHz), ultra-low output noise (60µVrms, 10Hz–100kHz), and ±1% output voltage accuracy over temperature. Built on a CMOS process, it features enable control, thermal shutdown, and short-circuit protection - optimized for RF supply rails in space-constrained portable electronics.

For engineers reviewing the AP7343-285W5-7 datasheet, AP7343-285W5-7 pinout, AP7343-285W5-7 application, or AP7343-285W5-7 equivalent, key selection criteria include its 1.7V–5.25V input range, 35µA quiescent current, SOT25 package footprint, and guaranteed 300mA output under 2.85V fixed regulation with <0.31V dropout at full load.

Technical Context

The AP7343-285W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor - enabling stable 2.85V regulation with fast line/load transient response and no external compensation required. Its EN pin supports active-high logic-level control (1.3V–5.25V threshold) and must not float.

Thermal protection activates at +150°C with +20°C hysteresis, and short-circuit current is clamped to ~60mA. The device operates across –40°C to +85°C ambient and delivers 300mA output with ≤0.31V dropout (SOT25) at V_OUT = 2.85V, I_OUT = 300mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.85V ±1% at +25°C; ±30ppm/°C tempco ensures stability across –40°C to +85°C.
Max Output Current	300mA guaranteed - sufficient for powering RF transceivers, camera ISPs, or baseband processors without derating.
Dropout Voltage	0.31V max at 300mA (SOT25) - enables operation from 3.16V input, critical for single-cell Li-ion or USB-powered systems.
PSRR	75dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, preserving RF signal integrity.
Output Noise	60µVrms (10Hz–100kHz) - low enough for sensitive analog circuits like VCOs, ADC references, or audio codecs.
I_Q	35µA typical - extends battery life in always-on sensor nodes or standby modes of handheld devices.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

AP7343-285W5-7 uses the SOT25 (SC-74A) 5-pin package - compact (2.9mm × 1.6mm × 1.1mm), thermally enhanced with exposed pad connected to GND for improved heat dissipation (R_θJA = 179°C/W).

Pin/Terminal	Circuit Role	Design Meaning
PIN1 (VIN)	Power Input	Accepts 1.7V–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin for stability.
PIN2 (GND)	Ground Reference	Primary return path for input/output currents; must connect to low-impedance ground plane to minimize noise coupling.
PIN3 (EN)	Enable Control	Active-high logic input; drives regulator ON/OFF; floating state disables device - tie to VIN if unused.
PIN4 (VOUT)	Regulated Output	Delivers 2.85V ±1%; requires ≥1µF ceramic output capacitor near load to ensure transient response and stability.
PIN5 (NC)	No Connection	Internally unconnected; PCB pad may be left floating or tied to GND for mechanical reinforcement only.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz - rejects ripple from upstream buck converters, reducing need for additional filtering stages in RF power domains.
Low Quiescent Current	35µA typical - enables >1-year battery life in IoT sensors operating at 10µA average system current.
Thermal Shutdown	+150°C trip with +20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking.
Short-Circuit Protection	Clamps output current to ~60mA - protects internal pass element and maintains safe junction temperature during fault conditions.
Wide Input Range	1.7V–5.25V - supports direct connection to single-cell Li-ion (2.7–4.2V), USB (4.75–5.25V), or hybrid power rails.

Applications

RF Power Supply

Camera Module Core Rail

Use Scenario: Providing clean bias to 2.4GHz/5GHz Wi-Fi/BT transceivers in smartphones and wearables.

IC Role / Device Role / Timing Role: Primary LDO for RF front-end ICs requiring ultra-low noise and high PSRR to prevent LO pulling and EVM degradation.

Use Value: 60µVrms noise and 75dB PSRR maintain EVM <1.5% at 54Mbps OFDM, meeting IEEE 802.11ac TX specs.

Use Scenario: Powering image signal processors (ISPs) and CMOS image sensors in mobile cameras.

IC Role / Device Role / Timing Role: Fixed 2.85V rail for sensor analog core and ISP I/O, where voltage stability directly impacts SNR and color fidelity.

Use Value: ±1% output accuracy and ±30ppm/°C tempco limit voltage drift to <±15mV over –20°C to +70°C, preventing banding artifacts.

Portable Media Player Audio

Wireless Adapter Baseband

Use Scenario: Supplying DACs, headphone amplifiers, and codec analog sections in Bluetooth headphones and portable speakers.

IC Role / Device Role / Timing Role: Low-noise post-regulator for audio signal chain, isolating sensitive analog stages from noisy digital supplies.

Use Value: 60µVrms broadband noise avoids audible hiss; 35µA I_Q extends playback time by >8% versus higher-I_Q alternatives.

Use Scenario: Powering baseband processors and memory interfaces in USB Wi-Fi dongles and cellular modems.

IC Role / Device Role / Timing Role: Stable 2.85V domain for DDR I/O and ARM Cortex-M cores, where voltage droop causes timing violations.

Use Value: 300mA capability with <0.31V dropout ensures reliable operation down to 3.16V input - critical during USB port voltage sag.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703T-285I/OT	300mA, 2.85V, 6µVrms noise, but 120µA I_Q; SOT23-5 package (larger R_θJA = 220°C/W).	Lacks integrated thermal shutdown; requires external thermal monitoring in high-power-density designs.	Prefer AP7343-285W5-7 when ultra-low noise and thermal safety are mandatory in compact layouts.
Torex XC6210B285MR-G	200mA max output, 2.85V, 40µVrms noise, 1.2µA I_Q; same SOT25 footprint but lower current rating.	Insufficient for RF PA bias or multi-core baseband loads exceeding 200mA peak.	Choose AP7343-285W5-7 where 300mA continuous delivery and robust short-circuit protection are required.

Compared with MCP1703T-285I/OT and XC6210B285MR-G, the AP7343-285W5-7 uniquely balances 300mA drive, 60µVrms noise, 35µA I_Q, and integrated thermal/short-circuit protection in the smallest SOT25 form factor - making it optimal for next-gen portable RF and imaging subsystems.

Availability

AP7343-285W5-7 is available at Aetrix Electronics and suitable for RF power supplies, camera module rails, portable media player audio stages, and wireless adapter baseband circuits requiring stable component supply, tight voltage tolerance, and long-term lifecycle support.

Supply support for AP7343-285W5-7 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 belongs to Diodes' high-performance LDO portfolio, engineered specifically for noise-sensitive, battery-powered portable electronics demanding ultra-low I_Q, high PSRR, and small-footprint packaging.

FAQ

What is the minimum input voltage required for AP7343-285W5-7 to regulate 2.85V at 300mA?

The minimum input voltage is determined by dropout: at 300mA and +25°C, maximum dropout is 0.31V in SOT25. Thus, VIN(min) = 2.85V + 0.31V = 3.16V. Operation below this risks output collapse under full load, especially at elevated temperatures where dropout increases.

Can AP7343-285W5-7 be used without an output capacitor?

No. The datasheet mandates ≥1µF ceramic output capacitance for stability and transient response. Omitting C_OUT causes oscillation and voltage overshoot during load steps, risking system malfunction. Low-ESR ceramic capacitors placed within 2mm of VOUT/GND pins are required.

Is the EN pin internally pulled up or down?

The EN pin has no internal pull-up or pull-down. It must be actively driven to ≥1.3V for enable or ≤0.5V for shutdown. Leaving it floating results in undefined operation and potential partial conduction - tie to VIN via 100kΩ resistor if unused.

Does AP7343-285W5-7 include reverse-current protection?

No. The AP7343-285W5-7 lacks reverse-current blocking; if VOUT exceeds VIN (e.g., during hot-swap or backup battery scenarios), current flows backward through the pass transistor. An external Schottky diode in series with VIN is required for reverse-polarity or backfeed protection.

AP7343-285W5-7 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):: 2.85V

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

AP7343-285W5-7 FAQ

1.How can I place an order for AP7343-285W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343-285W5-7 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 AP7343-285W5-7 reliable?

The price and inventory of AP7343-285W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-285W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343-285W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-285W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343-285W5-7?

AP7343-285W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343-285W5-7 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 AP7343-285W5-7?

For technical support, including AP7343-285W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-285W5-7 requirements.

6.How does Aetrix verify that AP7343-285W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343-285W5-7 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 AP7343-285W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343-285W5-7?

All AP7343-285W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-285W5-7, 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 AP7343-285W5-7 part is unused and in its original packaging.

Return procedure for AP7343-285W5-7:

1.Submit a request within 90 days.

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

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