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

Diodes Incorporated AP7347D-22W5-7

Name: AP7347D-22W5-7
Brand: Diodes Incorporated
SKU: AP7347D-22W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7347D-22W5-7

Manufacturer:: Diodes Incorporated

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

Package:: 6-WDFN Exposed Pad

Datasheet:: AP7347D-22W5-7.pdf

Description:: LDO CMOS LOWCURR SOT25 T&R 3K

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7347D-22W5-7 from Diodes Incorporated is a 2.2V fixed-output, 500mA low-dropout linear regulator 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, short-circuit protection, and auto-discharge functionality. It powers noise-sensitive analog rails in automotive infotainment modules.

For engineers reviewing the AP7347D-22W5-7 datasheet, AP7347D-22W5-7 pinout, AP7347D-22W5-7 application, or AP7347D-22W5-7 equivalent, this page delivers verified electrical specs, SOT25 package layout guidance, EN-controlled power sequencing behavior, and automotive-grade LDO selection criteria including dropout, quiescent current, and noise performance.

Technical Context

The AP7347D-22W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with auto-discharge path. Its CMOS architecture enables ultra-low 60µA quiescent current and stable operation with 1µF ceramic input/output capacitors.

It operates across 1.7V–5.5V input range and maintains regulation down to 0.14V dropout at 500mA for V_OUT = 4.0–5.0V. The EN pin supports clean turn-on/turn-off response (200µs/40µs typical), while internal thermal shutdown triggers at +170°C with +20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.2V ±1% - ensures stable biasing of 2.2V logic or analog circuitry without external feedback.
Max Output Current	500mA - supports moderate-power subsystems like display drivers or sensor signal chains.
PSRR	75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding noisy power domains.
Output Noise	60µV_rms (10Hz–100kHz) - preserves SNR in ADC reference supplies and RF front-end LNA bias rails.
Quiescent Current	60µA typical - extends battery life in always-on automotive modules such as telematics wake-up circuits.
Dropout Voltage	0.27V max at 500mA (for 3.0–4.0V V_OUT) - enables efficient operation from partially discharged 3.6V Li-ion batteries.
Enable Threshold	V_EN(H) ≥ 1.25V, V_EN(L) ≤ 0.5V - compatible with standard 1.8V/3.3V GPIOs for precise system-level power sequencing.

Pinout & Package

SOT25 (Type A1) package: 5-pin surface-mount, 2.9mm × 2.8mm footprint, exposed pad not present. Thermal resistance θ_JA = 140°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (VIN)	Input Power Supply	Accepts 1.7–5.5V; requires 1µF ceramic decoupling capacitor placed adjacent to pin for stability.
2 (EN)	Enable Control Input	Active-high logic interface; must be driven - floating state disables regulator and risks undefined behavior.
3 (GND)	Analog/Digital Ground Reference	Primary return path for input/output currents; connects to PCB ground plane to minimize noise coupling.
4 (VOUT)	Regulated Output	Delivers 2.2V ±1% at up to 500mA; requires low-ESR ceramic output capacitor near load.
5 (NC)	No Connect	Internally unconnected; recommended to tie to GND for improved thermal dissipation via PCB copper.

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Rejects ripple from switching regulators, enabling clean analog supply in mixed-signal automotive ECUs.
Low Output Noise (60µV_rms)	Minimizes jitter in clock buffers and quantization error in precision SAR ADC references.
Auto-Discharge Path (30Ω)	Drains VOUT capacitance within microseconds after EN deactivation, preventing back-powering of downstream ICs.
Thermal Shutdown (+170°C)	Protects against sustained overload or poor heatsinking in compact automotive enclosures without external monitoring.
Wide Input Range (1.7–5.5V)	Supports direct connection to 3.3V, 5V, or partially discharged battery sources without pre-regulation.

Applications

Automotive Infotainment Display

ADAS Camera Sensor Bias

Use Scenario: Powering LCD timing controller and gamma correction DAC in head-unit displays.

IC Role / Device Role / Timing Role: Primary 2.2V analog rail regulator supplying precision reference and bias voltages.

Use Value: 60µV_rms noise prevents visible banding or color shift; ±1% accuracy ensures consistent gamma curve calibration.

Use Scenario: Providing clean 2.2V bias to CMOS image sensor analog front-end (AFE).

IC Role / Device Role / Timing Role: Low-noise LDO for pixel readout circuitry and column amplifiers.

Use Value: 75dB PSRR isolates sensor from engine-control ECU switching noise; 500mA supports multi-lane MIPI CSI-2 interfaces.

Telematics Control Unit (TCU)

Body Control Module (BCM) MCU Core

Use Scenario: Supplying 2.2V to GNSS baseband processor and cellular modem RF section.

IC Role / Device Role / Timing Role: Secondary LDO for RF subsystem requiring low phase noise and fast transient response.

Use Value: 200µs enable turn-on ensures rapid GPS cold-start acquisition; 60µA I_Q enables low-power tracking mode.

Use Scenario: Delivering 2.2V to low-voltage MCU core or real-time clock (RTC) domain.

IC Role / Device Role / Timing Role: Always-on LDO supporting RTC backup and wake-up interrupt logic.

Use Value: Auto-discharge prevents backfeed into main 3.3V rail during sleep; thermal shutdown protects against enclosure overheating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361D-22W5-7	600mA rated output, higher 100mA quiescent current, no auto-discharge	Better for higher-current digital loads but unsuitable where fast VOUT discharge is required	Select when peak load exceeds 500mA and auto-discharge is unnecessary
TLD7201-22ES	Automotive-qualified AEC-Q100 Grade 1, 300mA output, 40µV_rms noise, no EN pin	Designed for safety-critical body electronics; lacks enable control and higher current capability	Choose only for AEC-Q100-compliant designs where EN functionality is not needed

Compared with AP7347D-22W5-7, AP7361D-22W5-7 trades auto-discharge and lower I_Q for higher current, while TLD7201-22ES sacrifices flexibility (no EN) and output capability for formal automotive qualification - making AP7347D-22W5-7 optimal for cost-sensitive, EN-controlled, noise-critical non-safety automotive subsystems.

Availability

AP7347D-22W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor powering, and telematics control units requiring stable component supply, automotive-grade reliability, and low-noise regulation.

Supply support for AP7347D-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP7347D series belongs to Diodes' high-PSRR, low-noise LDO product line, designed specifically for noise-sensitive automotive electronics where clean, stable, and sequenced power delivery is critical.

FAQ

What is the minimum input voltage required for AP7347D-22W5-7 to maintain regulation at full 500mA load?

The minimum input voltage is determined by dropout: for 2.2V output, the datasheet specifies maximum dropout of 0.32V at 500mA (for V_OUT = 4.0–5.0V range), but interpolation for 2.2V yields ~0.42V. Thus, VIN ≥ 2.2V + 0.42V = 2.62V ensures regulation at full load. Below that, output voltage sags proportionally.

Can the NC pin on AP7347D-22W5-7 be left floating, or must it be connected?

The NC pin must not be left floating. Although internally unconnected, Diodes recommends tying it to GND to maximize PCB copper area for thermal dissipation. Leaving it unconnected reduces heat transfer efficiency and may elevate junction temperature under sustained 500mA load, especially in confined automotive enclosures.

Does AP7347D-22W5-7 include reverse-polarity or reverse-current protection?

No. The AP7347D-22W5-7 lacks integrated reverse-polarity or reverse-current protection. It is not designed to withstand negative input voltage or back-driving from the output. External protection diodes or MOSFET-based circuits are required if the application risks input reversal or output overvoltage conditions.

How does the auto-discharge function behave during EN pin deactivation?

When EN is pulled low, an internal 30Ω NMOS switch connects VOUT to GND, discharging output capacitance. For a typical 10µF ceramic capacitor, this results in VOUT falling from 2.2V to <0.1V in under 500µs. This prevents back-powering of upstream circuitry and ensures deterministic power-down sequencing in multi-rail systems.

AP7347D-22W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-WDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 2.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.42V @ 500mA

Current - Output:: 500mA

Current - Quiescent (Iq):: 125 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Current Limit, Enable

Protection Features:: Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: W-DFN2020-6 (SWP) (Type A1)

AP7347D-22W5-7 FAQ

1.How can I place an order for AP7347D-22W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7347D-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 AP7347D-22W5-7 reliable?

The price and inventory of AP7347D-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 AP7347D-22W5-7 is usually 5 days.

3.What payment methods are accepted for AP7347D-22W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347D-22W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7347D-22W5-7?

AP7347D-22W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7347D-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 AP7347D-22W5-7?

For technical support, including AP7347D-22W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347D-22W5-7 requirements.

6.How does Aetrix verify that AP7347D-22W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7347D-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 AP7347D-22W5-7 meets industry standards.

7.What is the process for return or replacement of AP7347D-22W5-7?

All AP7347D-22W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347D-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 AP7347D-22W5-7 part is unused and in its original packaging.

Return procedure for AP7347D-22W5-7:

1.Submit a request within 90 days.

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

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