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

Diodes Incorporated AP7347DQ-15W5-7

Name: AP7347DQ-15W5-7
Brand: Diodes Incorporated
SKU: AP7347DQ-15W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7347DQ-15W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7347DQ-15W5-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

AP7347DQ-15W5-7 from Diodes Incorporated is an automotive-grade 1.5V fixed-output low-dropout linear regulator delivering 500mA output current with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality-designed for powering noise-sensitive RF and infotainment subsystems in ADAS and automotive wireless communication systems.

For engineers reviewing the AP7347DQ-15W5-7 datasheet, AP7347DQ-15W5-7 pinout, AP7347DQ-15W5-7 application, or AP7347DQ-15W5-7 equivalent, this page delivers verified package mapping (SOT25 Type A1), validated terminal functions, confirmed AEC-Q100 qualification, and real-world design constraints including dropout voltage vs. load, EN threshold behavior, and thermal resistance (θ_JA = 140°C/W).

Technical Context

The AP7347DQ-15W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and NMOS pass transistor with auto-discharge capability. Its internal architecture supports fast line/load transient response and stable operation with only 1µF input/output ceramic capacitors.

It operates across 1.7V–5.5V input range, maintains regulation down to 1.5V output with dropout as low as 0.55V at 500mA (for V_OUT ≥ 1.4V), and includes thermal shutdown at +170°C with +20°C hysteresis-ensuring robustness in under-hood automotive environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% - ensures stable core supply for 1.5V logic rails without external feedback network.
Max Output Current	500mA - supports moderate-power automotive sensors, transceivers, and camera modules without derating at T_A ≤ +105°C.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in multi-rail automotive power domains.
Output Noise	60µV_rms (10Hz–100kHz) - enables clean analog/RF biasing for automotive cameras and GNSS receivers.
Quiescent Current	60µA typical - minimizes standby power loss in always-on vehicle networks (e.g., CAN wake-up circuits).
Dropout Voltage	0.55V max at 500mA (V_OUT = 1.5V) - allows operation from 2.05V input, compatible with partially discharged 12V battery systems via pre-regulator.
Enable Threshold	V_EN(H) ≥ 1.25V, V_EN(L) ≤ 0.5V - interfaces directly with 1.8V/3.3V microcontroller GPIO without level-shifting.

Pinout & Package

SOT25 (Type A1) package: 2.9mm × 2.8mm × 1.45mm body height, wettable flank-compatible, with exposed pad not present. Thermal resistance θ_JA = 140°C/W on JEDEC-standard multilayer board.

Pin	Circuit Role	Design Meaning
1	VIN	Main input power pin; requires local 1µF ceramic decoupling to GND for stability and transient immunity.
2	EN	Active-high enable; must be driven to ≥1.25V to activate regulator; floating state is undefined and prohibited.
3	GND	Analog/digital ground reference; connects to PCB ground plane to minimize noise coupling and thermal impedance.
4	VOUT	Regulated 1.5V output; requires low-ESR ceramic capacitor (≥1µF) placed adjacent to pin for load transient response.
5	NC	No-connect terminal; internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding.

Key Features

Feature	Design Value
Automotive Qualification	AEC-Q100 Grade 1 (−40°C to +125°C ambient), PPAP-capable, manufactured in IATF 16949-certified facilities.
Auto-Discharge Function	30Ω on-resistance NMOS between VOUT and GND when disabled - rapidly discharges output capacitance to prevent latch-up in sequencing-critical systems.
Low-Noise Design	60µV_rms integrated noise over 10Hz–100kHz - eliminates need for post-LDO RC filtering in RF signal chains.
High PSRR Architecture	75dB rejection at 1kHz, >50dB up to 100kHz - sustains signal integrity in proximity to high-frequency buck converters.
Thermal Protection	+170°C shutdown with +20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking.

Applications

Infotainment Power Supplies

Automotive RF Supplies

Use Scenario: Powering audio DSPs, display controllers, and touch interface ICs in center-stack head units.

IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying core logic voltage for SoC peripherals requiring tight regulation and low noise.

Use Value: ±1% accuracy ensures reliable boot and operation of 1.5V I/O domains; 60µV_rms noise prevents audible artifacts in Class-D amplifier bias paths.

Use Scenario: Biasing VCOs, LNAs, and mixer stages in cellular/V2X modems and GNSS receivers.

IC Role / Device Role / Timing Role: Clean, low-noise 1.5V rail isolating sensitive RF analog blocks from noisy digital power domains.

Use Value: 75dB PSRR suppresses ripple from nearby 3.3V/5V DC/DC converters; fast load transient response (<10µs) maintains VCO tuning stability during burst transmissions.

Cameras

Automotive POL in ADAS

Use Scenario: Supplying image sensor analog front-ends (AFE) and ISP cores in rear-view and surround-view camera modules.

IC Role / Device Role / Timing Role: Dedicated 1.5V LDO for sensor pixel array bias and ADC reference voltage generation.

Use Value: Low 60µV_rms noise directly reduces fixed-pattern noise (FPN) and improves SNR; ±1% accuracy ensures consistent ADC full-scale calibration across temperature.

Use Scenario: Point-of-load regulation for radar processor memory interfaces and FPGA configuration banks in forward collision warning systems.

IC Role / Device Role / Timing Role: Secondary LDO providing tightly regulated 1.5V for DDR I/O or SerDes termination in safety-critical ADAS ECUs.

Use Value: AEC-Q100 qualification guarantees reliability over 15-year vehicle lifetime; 500mA capacity supports burst-mode memory access without voltage droop.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73315PDBVR	Lower max output current (300mA), no auto-discharge, higher quiescent current (45µA typ vs. 60µA), same 1.5V fixed output.	Lacks AEC-Q100 qualification; rated only for industrial temp (−40°C to +125°C junction, but not automotive PPAP or change control).	Select only for non-automotive designs where 300mA suffices and discharge is handled externally.
NCP114AMX15T2G	Same 500mA rating and ±1% accuracy, but lower PSRR (65dB @ 1kHz), higher noise (120µV_rms), no auto-discharge, AEC-Q100 qualified.	Higher noise limits use in RF/camera AFE; absence of discharge requires external MOSFET for safe power-down sequencing.	Acceptable for cost-sensitive ADAS sub-systems where PSRR/noise margins allow, but requires added external circuitry for discharge.

Compared with TLV73315PDBVR and NCP114AMX15T2G, the AP7347DQ-15W5-7 uniquely combines automotive qualification, 500mA capability, 75dB PSRR, 60µV_rms noise, and integrated auto-discharge-enabling single-component compliance with stringent ADAS power sequencing and noise requirements.

Availability

AP7347DQ-15W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and vehicle-to-everything (V2X) RF subsystems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

Supply support for AP7347DQ-15W5-7 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 devices, with manufacturing certified to IATF 16949 and product lines focused on automotive, industrial, and computing applications.

The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, high-reliability power rails in ADAS, infotainment, and telematics systems operating across −40°C to +125°C ambient.

FAQ

What is the minimum input voltage required for AP7347DQ-15W5-7 to maintain regulation at full 500mA load?

The AP7347DQ-15W5-7 requires VIN ≥ VOUT + dropout voltage. At 500mA and 1.5V output, maximum dropout is 0.55V per datasheet (DS42799 Rev. 5-2, p.4). Thus, minimum valid input is 2.05V. Below this, output voltage drops below 1.5V ±1%, risking system instability in 1.5V logic domains.

Does AP7347DQ-15W5-7 require an external pull-up resistor on the EN pin if used in a system with open-drain enable signaling?

No external pull-up is needed if the driving source meets EN thresholds: V_EN(H) ≥ 1.25V and V_EN(L) ≤ 0.5V. However, if the source cannot actively drive high (e.g., open-drain MCU GPIO), a pull-up to VIN (≤5.5V) is mandatory-per datasheet recommendation-to avoid floating EN, which may cause erratic startup or shutdown behavior.

Can AP7347DQ-15W5-7 be used with ceramic output capacitors smaller than 1µF?

The datasheet specifies stability with ≥1µF ceramic COUT (p.12). Using <1µF risks instability, especially under load transients, due to insufficient phase margin. While some variants may tolerate 0.47µF in limited conditions, Diodes does not guarantee performance below 1µF; design validation with actual layout and load profile is required before deviation.

How does the auto-discharge function behave during EN-driven shutdown, and what is its impact on system power sequencing?

When EN is pulled low, the internal 30Ω NMOS switch connects VOUT to GND (p.4, DS42799), discharging output capacitance with τ ≈ R×C (e.g., 30Ω × 10µF = 300µs time constant). This ensures rapid VOUT collapse-critical for preventing back-powering of upstream logic or violating reset timing in multi-rail automotive MCUs during controlled power-down sequences.

AP7347DQ-15W5-7 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):: 5.5V

Voltage - Output (Min/Fixed):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.66V @ 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

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7347DQ-15W5-7 FAQ

1.How can I place an order for AP7347DQ-15W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7347DQ-15W5-7 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 AP7347DQ-15W5-7 reliable?

The price and inventory of AP7347DQ-15W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-15W5-7 is usually 5 days.

3.What payment methods are accepted for AP7347DQ-15W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-15W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7347DQ-15W5-7?

AP7347DQ-15W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7347DQ-15W5-7 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 AP7347DQ-15W5-7?

For technical support, including AP7347DQ-15W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-15W5-7 requirements.

6.How does Aetrix verify that AP7347DQ-15W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7347DQ-15W5-7 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 AP7347DQ-15W5-7 meets industry standards.

7.What is the process for return or replacement of AP7347DQ-15W5-7?

All AP7347DQ-15W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-15W5-7, 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 AP7347DQ-15W5-7 part is unused and in its original packaging.

Return procedure for AP7347DQ-15W5-7:

1.Submit a request within 90 days.

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

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