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

Diodes Incorporated AP7347D-11FDZW-7B

Name: AP7347D-11FDZW-7B
Brand: Diodes Incorporated
SKU: AP7347D-11FDZW-7B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7347D-11FDZW-7B

Manufacturer:: Diodes Incorporated

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

Package:: 6-WDFN Exposed Pad

Datasheet:: AP7347D-11FDZW-7B.pdf

Description:: LDO CMOS LOWCURR W-DFN2020-6 T&R

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7347D-11FDZW-7B from Diodes Incorporated is a 500mA low-dropout linear regulator with fixed 1.1V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 60µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality-designed for noise-sensitive automotive power rails and portable equipment requiring stable low-voltage bias.

For engineers reviewing the AP7347D-11FDZW-7B datasheet, AP7347D-11FDZW-7B pinout, AP7347D-11FDZW-7B application, or AP7347D-11FDZW-7B equivalent, this LDO delivers high PSRR and ultra-low noise in a wettable W-DFN2020-6 package ideal for space-constrained automotive infotainment and ADAS subsystems where input voltage ranges from 1.7V to 5.5V and dropout must remain below 0.75V at full load.

Technical Context

The AP7347D-11FDZW-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and NMOS pass transistor with auto-discharge capability via an internal 30Ω N-channel switch. Its architecture supports fast transient response (<200µs enable turn-on) and maintains stability with only 1µF ceramic input/output capacitors.

It operates across –40°C to +125°C ambient temperature, includes thermal shutdown at +170°C with +20°C hysteresis, and guarantees ±1% output accuracy over line, load, and temperature-enabling reliable operation in automotive engine control units and battery-powered industrial sensors without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.1V ±1% - ensures precise biasing for 1.1V-core logic and low-voltage microcontrollers without external feedback.
Max Output Current	500mA - supports moderate-power digital ICs and analog front-ends in compact automotive modules.
PSRR	75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-signal systems.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes jitter in clock buffers and ADC reference supplies.
Quiescent Current	60µA - extends battery life in always-on vehicle telematics and sensor nodes.
Dropout Voltage	0.75V max at 500mA (for VOUT = 1.1V) - enables operation from single-cell Li-ion (3.0V min) or 3.3V rails with margin.
Enable Threshold	V_EN(H) ≥ 1.25V, V_EN(L) ≤ 0.5V - compatible with standard GPIOs and open-drain controllers.

Pinout & Package

AP7347D-11FDZW-7B is packaged in a wettable W-DFN2020-6 (SWP) Type A1 package (2.0mm × 2.0mm, 0.75mm height) with exposed thermal pad. The package supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1	VOUT	Regulated 1.1V output - connect directly to load with low-impedance trace and local 1µF ceramic capacitor.
2, 5	NC	No-connect pins - recommended to tie to GND for enhanced thermal conduction and EMI shielding.
3	GND	Analog/digital ground reference - connect to solid ground plane under exposed pad for optimal thermal dissipation.
4	EN	Active-high enable - drive >1.25V to activate; <0.5V to shut down; avoid floating to prevent erratic behavior.
6	VIN	Input supply (1.7V–5.5V) - place 1µF decoupling capacitor within 2mm of this pin and GND.
EP	Exposed Pad	Thermal interface - must be connected to large copper area tied to GND; not electrically functional as ground node.

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Rejects ripple from buck converter switching frequencies, preserving signal integrity in RF and audio subsystems.
Low 60µV_rms noise	Enables clean power for precision analog circuits like SAR ADCs and PLL VCOs without additional filtering.
Auto-discharge function	Internal 30Ω NMOS discharges VOUT when disabled, preventing hold-up voltage that could delay system reset.
Wettable flank package	Facilitates automated AOI inspection and improves solder joint reliability in automotive-grade reflow processes.
±1% output accuracy	Meets tight tolerance requirements for core voltage regulation in 1.1V FPGA I/O banks and ASIC power domains.

Applications

Automotive Infotainment

Portable Medical Sensors

Use Scenario: Powering DSP cores and audio codecs in head-unit systems operating in vehicle cabins with wide ambient temperature swings and high EMI.

IC Role / Device Role / Timing Role: Primary 1.1V LDO supplying low-noise bias to audio DACs and real-time processing units.

Use Value: 75dB PSRR rejects alternator ripple and CAN bus transients; ±1% accuracy ensures consistent codec performance across –40°C to +105°C.

Use Scenario: Regulating power for wearable ECG front-end amplifiers and Bluetooth LE SoCs in battery-operated diagnostic patches.

IC Role / Device Role / Timing Role: Low-quiescent-current LDO delivering stable 1.1V to analog signal chain and BLE radio subsystems.

Use Value: 60µA IQ extends 7-day battery life; 60µV_rms noise prevents baseline drift in sub-microvolt biopotential measurements.

Industrial PLC I/O Modules

ADAS Camera Power Rails

Use Scenario: Providing isolated 1.1V bias to isolated RS-485 transceivers and microcontroller peripherals in factory automation controllers.

IC Role / Device Role / Timing Role: Secondary LDO post-regulator ensuring clean, accurate voltage for communication interface ICs.

Use Value: Dropout <0.75V allows operation from 3.3V backplane rails even under brownout conditions; thermal shutdown protects during field wiring faults.

Use Scenario: Supplying image sensor analog core and ISP logic in surround-view camera modules mounted near engine compartments.

IC Role / Device Role / Timing Role: High-reliability LDO powering CIS analog front-end and timing-critical ISP blocks.

Use Value: –40°C to +125°C operation meets AEC-Q100 Grade 2; wettable flanks ensure solder joint integrity during thermal cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, high-PSRR LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361D-11FDZW-7B	600mA rating, same 1.1V output, but higher 100µA IQ and 65dB PSRR at 1kHz.	Suitable for higher-current loads but less optimal for ultra-low-noise analog stages.	Select if load current exceeds 500mA; accept trade-off in noise and PSRR for extra headroom.
TLD1111EL	1.1V fixed, 500mA, but no enable pin and 90µV_rms noise; automotive-qualified per AEC-Q100 Grade 1.	Lacks EN control and has higher noise-limits use in dynamically powered systems.	Choose only when EN functionality is unnecessary and AEC-Q100 Grade 1 certification is mandatory.

Compared with AP7347D-11FDZW-7B, AP7361D-11FDZW-7B offers higher current capacity at the cost of noise and PSRR, while TLD1111EL provides stricter automotive qualification but forfeits enable control and low-noise performance-making AP7347D-11FDZW-7B the optimal balance for noise-sensitive, dynamically controlled automotive subsystems.

Availability

AP7347D-11FDZW-7B is available at Aetrix Electronics and suitable for automotive infotainment, portable medical diagnostics, and ADAS camera modules requiring stable component supply, long-term lifecycle support, and AEC-compliant sourcing.

Supply support for AP7347D-11FDZW-7B 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 for automotive, industrial, computing, and consumer markets-with emphasis on high-reliability, AEC-Q100-qualified power management solutions.

The AP7347D series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-critical automotive subsystems and portable electronics demanding precision voltage regulation with minimal board space.

FAQ

What is the maximum allowable input voltage for AP7347D-11FDZW-7B?

The absolute maximum input voltage is 6.0V. However, the recommended operating range is 1.7V to 5.5V. Exceeding 5.5V may trigger overvoltage protection or degrade long-term reliability-even if within absolute ratings-so design margins should maintain VIN ≤ 5.5V under all conditions including transients.

Does AP7347D-11FDZW-7B require an external discharge resistor?

No. The device integrates an auto-discharge NMOS switch (30Ω typical) between VOUT and GND when EN is low. This eliminates the need for an external resistor, reduces BOM count, and ensures rapid VOUT decay-critical for deterministic power sequencing in multi-rail systems.

Can AP7347D-11FDZW-7B be used in AEC-Q100 qualified designs?

The AP7347D-11FDZW-7B itself is not AEC-Q100 certified; however, its automotive-grade variant AP7347DQ-11FDZW-7B is fully qualified to AEC-Q100 Grade 2 (–40°C to +105°C). For production automotive applications, the Q-suffix part must be specified-this version undergoes extended reliability testing and lot traceability.

What is the thermal resistance (θ_JA) of the W-DFN2020-6 package under standard JEDEC 51-7 conditions?

The junction-to-ambient thermal resistance is 54°C/W when mounted on a 3-inch × 3-inch multilayer PCB with 1oz internal planes and 2oz top/bottom copper. This value assumes the exposed pad is soldered to a minimum 10mm² GND copper area-reducing θ_JA by up to 20°C/W compared to non-thermal-pad layouts.

AP7347D-11FDZW-7B 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):: 1.1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.95V @ 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-11FDZW-7B FAQ

1.How can I place an order for AP7347D-11FDZW-7B through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7347D-11FDZW-7B 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-11FDZW-7B reliable?

The price and inventory of AP7347D-11FDZW-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347D-11FDZW-7B is usually 5 days.

3.What payment methods are accepted for AP7347D-11FDZW-7B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347D-11FDZW-7B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7347D-11FDZW-7B?

AP7347D-11FDZW-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7347D-11FDZW-7B 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-11FDZW-7B?

For technical support, including AP7347D-11FDZW-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347D-11FDZW-7B requirements.

6.How does Aetrix verify that AP7347D-11FDZW-7B is sourced from the original manufacturer or authorized distributors?

All AP7347D-11FDZW-7B 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-11FDZW-7B meets industry standards.

7.What is the process for return or replacement of AP7347D-11FDZW-7B?

All AP7347D-11FDZW-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7347D-11FDZW-7B, 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-11FDZW-7B part is unused and in its original packaging.

Return procedure for AP7347D-11FDZW-7B:

1.Submit a request within 90 days.

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

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