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

Diodes Incorporated AP7343D-36W5-7

Name: AP7343D-36W5-7
Brand: Diodes Incorporated
SKU: AP7343D-36W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343D-36W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343D-36W5-7.pdf

Description:: IC REG LINEAR 3.6V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343D-36W5-7 from Diodes Incorporated is a 300mA, 3.6V fixed-output low-dropout linear regulator with high PSRR (75dB at 1kHz), ultra-low output noise (60µV_rms, 10Hz–100kHz), and ±1% output voltage accuracy over temperature. Built on a CMOS process, it features enable control, thermal shutdown, short-circuit protection, and an auto-discharge function. It powers RF supplies and camera modules in space-constrained portable electronics.

For engineers reviewing the AP7343D-36W5-7 datasheet, AP7343D-36W5-7 pinout, AP7343D-36W5-7 application, or AP7343D-36W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.22–0.29V), quiescent current (35µA typ), EN logic thresholds (0.5V_IL/1.3V_IH), and thermal resistance (179°C/W in SOT25).

Technical Context

The AP7343D integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with built-in discharge path. Its CMOS architecture enables low quiescent current and fast load transient response-critical for battery-powered RF and imaging subsystems.

It operates across 1.7V–5.25V input range and delivers stable 3.6V output up to 300mA. The enable pin (EN) provides precise on/off control with 0.01µA standby current, while thermal shutdown (150°C) and fold-back current limiting (55mA short-circuit) ensure robust operation under fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.6V ±1% at +25°C; maintains regulation down to 1.7V input
Max Output Current	300mA continuous; supports peak loads in portable media players and wireless adapters
PSRR	75dB at 1kHz; suppresses switching noise from PMICs or DC-DC converters feeding its input
Output Noise	60µV_rms (10Hz–100kHz); meets low-noise requirements for RF bias and image sensor analog rails
Quiescent Current	35µA typical; extends battery life in always-on camera or Bluetooth modules
Dropout Voltage	0.22–0.31V at 300mA (SOT25); enables operation from single-cell Li-ion (3.0–4.2V) with margin
Enable Thresholds	V_EN-HI ≥1.3V, V_EN-LO ≤0.5V; compatible with 1.8V/3.3V GPIO without level-shifting

Pinout & Package

AP7343D-36W5-7 is packaged in SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm), a surface-mount package optimized for compact PCB layouts. The exposed pad (EP) must be connected to GND via large copper area for thermal dissipation but not used as sole GND electrode.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 4)	Power Input	Accepts 1.7–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin
GND (Pin 2)	Ground Reference	Primary return path for output current and internal circuits; connects to system ground plane
EN (Pin 3)	Enable Control	Active-high logic input; drives regulator ON/OFF; must not float; 0.01µA leakage in shutdown
VOUT (Pin 1)	Regulated Output	Delivers 3.6V ±1%; requires ≥1µF ceramic output capacitor near load for stability and transient response
NC (Pin 5)	No Connection	Internally unconnected; electrically isolated; may be left floating or tied to GND for mechanical stability

Key Features

Feature	Design Value
Auto-Discharge Function	Internal 30Ω NMOS discharge path activates when EN = LOW, rapidly draining VOUT to prevent hold-up in power sequencing
High PSRR at Low Frequencies	75dB at 1kHz ensures clean 3.6V rail even when powered from noisy switcher outputs or shared battery sources
Low-Noise Analog Supply	60µV_rms noise floor supports sensitive analog front-ends in cameras and RF transceivers without external filtering
Thermal Protection	150°C junction shutdown with 20°C hysteresis prevents damage during sustained overload or poor heatsinking
Wide Input Range	1.7–5.25V operation allows direct use with Li-ion, Li-poly, or regulated 3.3V/5V system rails

Applications

Smartphone Camera Module

RF Power Amplifier Bias

Use Scenario: Powers CIS (CMOS Image Sensor) analog core and PLL in smartphone rear cameras requiring ultra-low noise and fast turn-on.

IC Role / Device Role / Timing Role: Primary 3.6V analog supply LDO with enable-controlled power sequencing synchronized to sensor initialization.

Use Value: 60µV_rms noise prevents image banding; 35µA quiescent current minimizes standby drain; 0.22V dropout preserves headroom at end-of-life battery voltage.

Use Scenario: Supplies bias voltage to GaAs pHEMT power amplifiers in 4G/5G mobile front-end modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR post-regulator cleaning up switched-mode supply ripple before PA stage.

Use Value: 75dB PSRR at 1kHz rejects envelope-tracking noise; fast load transient response (<100µs settling) maintains PA linearity during burst transmission.

Portable Media Player Audio Codec

Wireless Adapter Baseband IC

Use Scenario: Provides clean 3.6V supply to stereo audio DAC/ADC and headphone driver in Bluetooth speakers and portable players.

IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating audio signal chain from digital SoC noise coupling.

Use Value: Sub-100µV noise floor avoids audible hiss; ±1% accuracy ensures consistent DAC reference scaling across temperature.

Use Scenario: Powers baseband processor and RF transceiver ICs in USB Wi-Fi/Bluetooth dongles with tight board space constraints.

IC Role / Device Role / Timing Role: Compact-area SOT25 LDO enabling dense layout while delivering stable 3.6V for mixed-signal operation.

Use Value: 179°C/W θ_JA allows full 300mA output without external heatsink; auto-discharge prevents back-powering during hot-plug events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1826-3602E/DB	300mA, 3.6V, ±2% accuracy, 65dB PSRR @ 1kHz, no auto-discharge, SOT23-5	Lacks discharge path; higher noise (85µV_rms) and lower PSRR limit suitability in RF/camera apps	Select if discharge is unnecessary and cost sensitivity outweighs noise/PSRR requirements
Torex XC6210B362MR-G	300mA, 3.6V, ±1% accuracy, 70dB PSRR @ 1kHz, 50µV_rms, SOT25, no discharge	Lower noise than AP7343D but lacks auto-discharge; slightly lower PSRR reduces ripple rejection in noisy environments	Prefer where lowest noise is critical and system-level discharge is handled externally

Compared with MCP1826-3602E/DB and XC6210B362MR-G, AP7343D-36W5-7 uniquely combines ±1% accuracy, 75dB PSRR, 60µV_rms noise, and integrated discharge in SOT25-making it optimal for RF and imaging systems demanding both cleanliness and controlled power-down.

Availability

AP7343D-36W5-7 is available at Aetrix Electronics and suitable for smartphone camera modules, RF power amplifier biasing, portable media player audio codecs, and wireless adapter baseband ICs requiring stable component supply across production lifecycles.

Supply support for AP7343D-36W5-7 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 devices, with design centers in Asia, Europe, and the US.

The AP7343 series targets portable and battery-powered applications-delivering high PSRR, low noise, and ultra-low quiescent current in miniature packages for smartphones, tablets, and wireless infrastructure.

FAQ

What is the minimum input voltage required for AP7343D-36W5-7 to regulate 3.6V at 300mA?

The minimum input voltage is determined by dropout: at 300mA and 3.6V output, typical dropout is 0.22V (max 0.31V). Thus, VIN must be ≥3.82V (3.6V + 0.22V) for guaranteed regulation. At 85°C ambient, worst-case dropout rises to 0.29V, requiring VIN ≥3.89V.

Does AP7343D-36W5-7 require an external discharge resistor?

No. AP7343D-36W5-7 integrates an auto-discharge NMOS (30Ω typical) that activates when EN is pulled low, rapidly discharging VOUT. This eliminates need for external resistors and simplifies power sequencing in portable systems with strict turn-off timing.

Can AP7343D-36W5-7 be used with ceramic output capacitors smaller than 1µF?

Yes-the device is stable with ≥1µF ceramic capacitors, but smaller values (e.g., 0.47µF) may compromise transient response and phase margin. For 300mA load steps, ≥1µF is recommended; ESR <10mΩ ensures stability per datasheet ESR vs. IOUT graph.

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

In SOT25, θ_JA = 179°C/W; in X2-DFN1010-4 (Type B), it is 237°C/W. The SOT25 offers better thermal dissipation due to larger copper exposure and lower junction-to-board resistance (79.2°C/W vs. 85.7°C/W), making it preferable for 300mA continuous operation without forced airflow.

AP7343D-36W5-7 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):: 3.6V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.29V @ 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-36W5-7 FAQ

1.How can I place an order for AP7343D-36W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343D-36W5-7 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-36W5-7 reliable?

The price and inventory of AP7343D-36W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-36W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343D-36W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-36W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343D-36W5-7?

AP7343D-36W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343D-36W5-7 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-36W5-7?

For technical support, including AP7343D-36W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-36W5-7 requirements.

6.How does Aetrix verify that AP7343D-36W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343D-36W5-7 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-36W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343D-36W5-7?

All AP7343D-36W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-36W5-7, 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-36W5-7 part is unused and in its original packaging.

Return procedure for AP7343D-36W5-7:

1.Submit a request within 90 days.

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

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