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

Diodes Incorporated AP7343-22W5-7

Name: AP7343-22W5-7
Brand: Diodes Incorporated
SKU: AP7343-22W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7343-22W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7343-22W5-7.pdf

Description:: IC REG LINEAR 2.2V 300MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7343-22W5-7 from Diodes Incorporated is a 300mA, 2.2V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in compact portable electronics.

For engineers reviewing the AP7343-22W5-7 datasheet, AP7343-22W5-7 pinout, AP7343-22W5-7 application, or AP7343-22W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.22–0.29V for V_OUT=2.2V), enable threshold compatibility (EN high ≥1.3V), thermal resistance (179°C/W in SOT25), and SOT25 package footprint constraints.

Technical Context

The AP7343-22W5-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current limit circuit, and thermal shutdown. Its EN pin provides precise on/off control with defined logic thresholds (V_IL ≤0.5V, V_IH ≥1.3V) and <1.0µA leakage.

It delivers stable 2.2V output across input voltages from 1.7V to 5.25V, supports 300mA guaranteed load current, and maintains regulation under fast load transients (e.g., 1mA ↔ 300mA steps) when paired with ≥1µF ceramic C_OUT. No discharge function is included (non-D variant).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.2V ±1% at +25°C; ensures stable bias for 2.2V-tolerant RF ICs and baseband processors.
Max Output Current	300mA guaranteed; sufficient for powering single-band RF front-end modules or camera sensor interfaces.
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_rms (10Hz–100kHz); minimizes phase noise degradation in VCO/PLL supply domains.
Quiescent Current	35µA typical; enables ultra-low-power standby modes in battery-operated devices without compromising wake-up latency.
Dropout Voltage	0.22–0.29V at 300mA (SOT25); allows operation from single-cell Li-ion (3.0V min) down to ~2.42V input while sustaining 2.2V output.
Enable Threshold	V_IH ≥1.3V, V_IL ≤0.5V; compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

AP7343-22W5-7 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). The NC pin must remain unconnected per datasheet guidance.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (VIN)	Power Input	Accepts 1.7–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to this pin.
Pin 2 (GND)	Ground Reference	Primary return path for input/output currents; must connect to low-impedance ground plane to minimize noise coupling.
Pin 3 (EN)	Enable Control	Active-high digital input; drives regulator into shutdown (<1.0µA I_STANDBY) when pulled ≤0.5V.
Pin 4 (VOUT)	Regulated Output	Delivers 2.2V ±1% to load; requires ≥1µF ceramic output capacitor placed within 2mm of this pin and GND.
Pin 5 (NC)	No Connection	Internally unconnected; must be left floating or tied to GND only if required by PCB mechanical constraints - not for electrical function.

Key Features

Feature	Design Value
High PSRR at 1kHz	75dB - enables clean power delivery to noise-sensitive RF sections even with noisy shared input sources.
Low Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in analog front-ends and clock distribution paths.
Ultra-Low Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and wearable devices.
Thermal Shutdown Protection	+150°C trip with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design.
Wide Input Voltage Range	1.7V to 5.25V - supports direct connection to single-cell Li-ion, USB VBUS, or intermediate buck outputs.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

Use Scenario: Providing stable 2.2V bias to GaAs pHEMT power amplifiers in LTE/5G front-end modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering regulated V_CC to PA collector/drain node.

Use Value: Maintains PA linearity and EVM performance by rejecting switching noise from PMIC DC/DC converters sharing the same battery rail.

Use Scenario: Powering image sensor core logic and analog pixel array in smartphone rear cameras.

IC Role / Device Role / Timing Role: Fixed 2.2V LDO supplying critical sensor core voltage with minimal ripple-induced fixed-pattern noise.

Use Value: Reduces dark current variation and improves SNR by limiting output noise to 60µV_rms across 10Hz–100kHz band.

Wireless Adapter Baseband

Portable Media Player Audio Codec

Use Scenario: Regulating 2.2V supply for Wi-Fi/BT SoC baseband processors in USB dongles and IoT gateways.

IC Role / Device Role / Timing Role: Enable-controlled LDO enabling rapid power cycling of baseband subsystem during sleep/wake transitions.

Use Value: Achieves <1.0µA shutdown current and fast turn-on (<100µs) to meet Bluetooth LE duty-cycle requirements.

Use Scenario: Delivering clean 2.2V to stereo audio DAC/ADC in portable media players and wireless earbuds.

IC Role / Device Role / Timing Role: Low-noise LDO isolating sensitive audio conversion circuitry from noisy digital supply domains.

Use Value: Limits THD+N degradation by suppressing power supply-induced distortion via 75dB PSRR at audio-relevant frequencies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2202E/TO	250mA max output, 6µV_rms noise (10Hz–100kHz), 17µA I_Q, SOT23-5 package.	Lacks enable pin; fixed 2.2V output but no shutdown control - unsuitable for dynamic power gating.	Select when ultra-low noise dominates over enable functionality and load current stays ≤250mA.
Torex XC6210B222MR-G	200mA max output, 40µV_rms noise, 1.0µA I_Q (shutdown), 65dB PSRR at 1kHz, SOT25.	Lower PSRR and output current rating; optimized for ultra-low-I_Q rather than RF-grade noise rejection.	Prefer for always-on sensor nodes where standby current is critical and RF interference is absent.

Compared with MCP1700-2202E/TO and XC6210B222MR-G, the AP7343-22W5-7 uniquely balances 300mA drive capability, 75dB PSRR, and 35µA operating I_Q in the same SOT25 footprint - making it optimal for RF-supply applications requiring both headroom and noise immunity.

Availability

AP7343-22W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, wireless adapter baseband regulation, and portable media player audio codec applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for AP7343-22W5-7 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-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics where RF performance, battery life, and board space are critical constraints.

FAQ

What is the maximum input voltage for AP7343-22W5-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Operation above 5.25V risks permanent damage per Absolute Maximum Ratings. For reliable 2.2V output, VIN must exceed VOUT by at least the dropout voltage (≥0.22V at 300mA), so minimum functional VIN is ~2.42V.

Does AP7343-22W5-7 include an output discharge function?

No. The "-7" suffix indicates non-discharge configuration (per Diodes' ordering guide: blank = non-discharge, "D" = discharge). When disabled, the output remains floating and does not actively pull VOUT to GND. External discharge circuitry is required if rapid output discharge is needed during shutdown.

Can AP7343-22W5-7 be used with ceramic output capacitors smaller than 1µF?

Yes - the device is stable with ceramic capacitors as low as 0.47µF, but 1µF is recommended for optimal transient response and PSRR performance. Capacitor ESR must remain below 100mΩ across 10Hz–2MHz; X5R/X7R dielectrics with 0402 or 0603 case sizes are validated per layout guidelines.

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

In SOT25, θ_JA is 179°C/W; in X2-DFN1010-4 (Type B), it is 237°C/W - meaning the SOT25 offers superior ambient heat dissipation due to larger copper exposure and lower junction-to-board resistance (79.2 vs. 85.72°C/W). For 300mA loads at 85°C ambient, SOT25 limits junction temperature rise to ~53.7°C, staying well below the 125°C max.

AP7343-22W5-7 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):: 2.2V

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

AP7343-22W5-7 FAQ

1.How can I place an order for AP7343-22W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7343-22W5-7 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 AP7343-22W5-7 reliable?

The price and inventory of AP7343-22W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-22W5-7 is usually 5 days.

3.What payment methods are accepted for AP7343-22W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-22W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7343-22W5-7?

AP7343-22W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7343-22W5-7 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 AP7343-22W5-7?

For technical support, including AP7343-22W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-22W5-7 requirements.

6.How does Aetrix verify that AP7343-22W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7343-22W5-7 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 AP7343-22W5-7 meets industry standards.

7.What is the process for return or replacement of AP7343-22W5-7?

All AP7343-22W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-22W5-7, 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 AP7343-22W5-7 part is unused and in its original packaging.

Return procedure for AP7343-22W5-7:

1.Submit a request within 90 days.

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

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