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

Diodes Incorporated AP7347D-11W5-7

Name: AP7347D-11W5-7
Brand: Diodes Incorporated
SKU: AP7347D-11W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7347D-11W5-7

Manufacturer:: Diodes Incorporated

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

Package:: 6-WDFN Exposed Pad

Datasheet:: AP7347D-11W5-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:4,070

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Product details

Overview

AP7347D-11W5-7 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 and portable electronics, it operates across 1.7V–5.5V input and delivers stable power to microcontrollers, sensors, and RF circuitry.

For engineers reviewing the AP7347D-11W5-7 datasheet, AP7347D-11W5-7 pinout, AP7347D-11W5-7 application, or AP7347D-11W5-7 equivalent, key selection criteria include dropout voltage at 500mA (0.75V typ. for 1.1V V_OUT), EN logic thresholds (0.5V_IL/1.25V_IH), thermal resistance (140°C/W in SOT25), and wettable-flank W-DFN2020-6 package compatibility for automated optical inspection.

Technical Context

The AP7347D-11W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and NMOS pass transistor with auto-discharge capability. Its architecture enables fast load transient response (<200µs settling) and high line regulation (0.02%/V typical) under varying input conditions from 1.7V to 5.5V.

It supports active-low enable control with defined logic thresholds (V_ENL ≤ 0.5V, V_ENH ≥ 1.25V), includes thermal shutdown at +170°C with +20°C hysteresis, and provides foldback short-circuit current limiting (~180mA). The device is qualified for automotive-grade operation (−40°C to +125°C ambient) and meets AEC-Q100 stress test requirements per AP7347DQ variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.1V ±1% - ensures precise biasing for low-voltage logic cores and analog sensor interfaces.
Max Output Current	500mA - sufficient to power dual-core microcontrollers or multi-sensor subsystems without external boost stages.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in mixed-power-supply systems.
Output Noise	60µV_rms (10Hz–100kHz) - maintains signal integrity in ADC reference paths and RF front-end LDO stages.
Quiescent Current	60µA typical - extends battery life in always-on IoT nodes and automotive body-control modules.
Dropout Voltage	0.75V typ. at 500mA - enables operation from single-cell Li-ion (3.0V min) or 3.3V rails with margin.
Enable Thresholds	V_ENL ≤ 0.5V / V_ENH ≥ 1.25V - compatible with 1.8V/3.3V GPIOs and supports direct MCU-controlled power sequencing.
Thermal Resistance θ_JA	140°C/W (SOT25) - requires minimal PCB copper area for thermal management in space-constrained layouts.

Pinout & Package

SOT25 (Type A1) package: 5-pin surface-mount with exposed pad not present; footprint optimized for compact routing and hand-solderability. Wettable flank option supports AOI inspection.

Pin/Terminal	Circuit Role	Design Meaning
1 (VIN)	Input Power Supply	Accepts 1.7V–5.5V; requires local 1µF ceramic decoupling placed within 2mm of pin.
2 (EN)	Enable Control Input	Active-high logic; must be tied to VIN if unused; floating state disables regulator unpredictably.
3 (GND)	Power Ground Reference	Primary return path for input/output currents; connects directly to PCB ground plane for stability.
4 (VOUT)	Regulated Output	Delivers 1.1V ±1%; requires 1µF ceramic capacitor placed adjacent to pin for transient response.
5 (NC)	No Connect	Internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding.

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Enables clean power delivery in noisy environments like infotainment head units sharing 5V rail with buck converters.
Low Output Noise (60µV_rms)	Supports high-resolution SAR ADCs (16+ bits) without additional filtering, reducing BOM count.
Auto-Discharge Function	Integrates 30Ω N-channel FET to discharge VOUT when disabled - eliminates hold-up time in power-down sequences.
±1% Output Accuracy	Meets tight tolerance requirements for FPGA core voltage rails and low-voltage I/O supply domains.
Wettable Flank Packaging	SOT25 (W5) variant enables automated optical inspection of solder joints - critical for automotive Tier-1 manufacturing traceability.

Applications

Automotive Body Control Module

Industrial Sensor Node

Use Scenario: Powering CAN transceiver, LIN interface IC, and door-lock MCU in vehicle door module.

IC Role / Device Role / Timing Role: Primary 1.1V LDO supplying digital logic core and communication peripherals.

Use Value: 75dB PSRR prevents CAN bus bit errors caused by alternator ripple; ±1% accuracy ensures reliable MCU clock generation.

Use Scenario: Battery-powered wireless temperature/humidity sensor with BLE SoC and analog front-end.

IC Role / Device Role / Timing Role: Low-noise 1.1V supply for ADC reference and RF transceiver VDDIO.

Use Value: 60µV_rms noise preserves 12-bit sensor measurement fidelity; 60µA IQ extends 10-year battery life.

Portable Medical Monitor

Smart Home Hub Controller

Use Scenario: ECG front-end ASIC and ultra-low-power display driver in handheld diagnostic device.

IC Role / Device Role / Timing Role: Precision 1.1V rail for analog signal chain and touch controller I/O.

Use Value: Auto-discharge clears residual charge during sleep mode transitions, preventing false wake-ups.

Use Scenario: Powering voice-assistant SoC, microphone array bias, and Zigbee radio in always-listening hub.

IC Role / Device Role / Timing Role: Always-on 1.1V LDO enabling fast wake-from-sleep response.

Use Value: 0.75V dropout allows operation down to 1.85V battery voltage, maximizing usable cell capacity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703T-1102E/MB	1.1V fixed, 250mA max, 175µA IQ, no enable pin, SOT23-5 package	Lacks EN control and auto-discharge; lower current rating limits use in multi-peripheral designs	Select only for cost-sensitive, non-sequenced, low-current applications where enable is unnecessary.
Torex XC6210B112MR-G	1.1V fixed, 500mA, 1.0µA IQ (shutdown), 65dB PSRR @ 1kHz, SOT25	Lower PSRR and higher dropout (0.9V @ 500mA); ultra-low shutdown current but no auto-discharge	Prefer for ultra-low-power standby modes; avoid where ripple rejection or fast turn-off discharge is required.

Compared with MCP1703T-1102E/MB and XC6210B112MR-G, the AP7347D-11W5-7 uniquely combines 500mA drive, 75dB PSRR, 60µA operating IQ, and integrated auto-discharge - making it optimal for automotive and industrial systems requiring robust power sequencing and noise immunity.

Availability

AP7347D-11W5-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical monitors, and smart home hubs requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for AP7347D-11W5-7 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 solutions for automotive, industrial, computing, and consumer markets.

The AP7347D series belongs to Diodes' high-PSRR, low-noise LDO family, engineered specifically for noise-sensitive automotive and portable applications demanding precision voltage regulation and robust thermal performance.

FAQ

What is the minimum input voltage required for AP7347D-11W5-7 to regulate 1.1V output at 500mA?

The minimum input voltage is determined by dropout: 0.75V typical at 500mA, so VIN must be ≥ 1.85V (1.1V + 0.75V) to maintain regulation. At worst-case 0.95V dropout (per datasheet), VIN ≥ 2.05V ensures guaranteed 500mA output across temperature and process variation.

Can the NC pin on AP7347D-11W5-7 be left floating?

No - Pin 5 (NC) is internally unconnected but thermally coupled to the die. Diodes recommends connecting it to GND to improve heat dissipation and reduce thermal resistance by up to 15°C/W, especially in high-ambient or high-duty-cycle applications.

Does AP7347D-11W5-7 support reverse current blocking?

No - the device lacks integrated reverse-current protection. When VIN < VOUT, reverse current can flow through the internal pass transistor body diode. External reverse-blocking circuitry (e.g., series Schottky) is required in back-powering scenarios.

Is AP7347D-11W5-7 qualified for automotive applications?

The base AP7347D-11W5-7 is industrial-grade (−40°C to +125°C ambient), but Diodes offers the automotive-qualified AP7347DQ-11W5-7 variant, which undergoes AEC-Q100 stress testing and includes enhanced reliability screening for under-hood and chassis applications.

AP7347D-11W5-7 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):: 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-11W5-7 FAQ

1.How can I place an order for AP7347D-11W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7347D-11W5-7 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-11W5-7 reliable?

The price and inventory of AP7347D-11W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347D-11W5-7 is usually 5 days.

3.What payment methods are accepted for AP7347D-11W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347D-11W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7347D-11W5-7?

AP7347D-11W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7347D-11W5-7 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-11W5-7?

For technical support, including AP7347D-11W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347D-11W5-7 requirements.

6.How does Aetrix verify that AP7347D-11W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7347D-11W5-7 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-11W5-7 meets industry standards.

7.What is the process for return or replacement of AP7347D-11W5-7?

All AP7347D-11W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347D-11W5-7, 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-11W5-7 part is unused and in its original packaging.

Return procedure for AP7347D-11W5-7:

1.Submit a request within 90 days.

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

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