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

Diodes Incorporated AP7383-41WR-7

Name: AP7383-41WR-7
Brand: Diodes Incorporated
SKU: AP7383-41WR-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7383-41WR-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7383-41WR-7.pdf

Description:: IC REG LIN 4.1V SOT25 T&R 3K

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7383-41WR-7 from Diodes Incorporated is a fixed-output 4.15V ultra-low dropout (ULDO) linear regulator IC designed for power management in space-constrained, battery-powered systems. It delivers up to 150mA output current with 500mV dropout at 50mA, ±1% output voltage accuracy, and only 1.8–3.0µA ground current across load. Its wide 3.5–30V input range and thermal shutdown make it suitable for USB-powered instrumentation and portable computing peripherals.

For engineers reviewing the AP7383-41WR-7 datasheet, AP7383-41WR-7 pinout, AP7383-41WR-7 application, or AP7383-41WR-7 equivalent, key selection criteria include dropout performance at 150mA, EN pin logic thresholds (2.0V high / 0.4V low), thermal resistance (166°C/W in SOT25-WR), compatibility with 1µF ceramic capacitors, and fixed 4.15V output tolerance over –40°C to +125°C junction temperature.

Technical Context

The AP7383-41WR-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 4.15V output, current-limit protection (150mA typical), and enable control circuitry. It operates without external feedback components and supports direct connection to low-ESR ceramic output capacitors.

Its internal architecture provides excellent line regulation (0.05%/V) and load regulation (0.5% over 1–150mA), with thermal shutdown triggered at +160°C and 20°C hysteresis. The EN pin allows system-level power sequencing, and the NC pins are internally unconnected-recommended tied to GND for thermal enhancement.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 4.15V ±1% - ensures stable rail for 4.2V nominal Li-ion–fed peripherals without external resistive divider.
Input Voltage Range	3.5V to 30V - supports direct connection to unregulated 5V/9V/12V/24V supplies and automotive transients.
Max Output Current	150mA - sufficient for low-power microcontrollers, sensors, and USB interface ICs.
Dropout Voltage	360–580mV @ 50mA - enables regulation down to VIN = 4.51V while maintaining 4.15V output.
Ground Current	1.8–3.0µA @ IOUT = 0–150mA - minimizes quiescent power loss in always-on battery backup circuits.
EN Pin Thresholds	V_EN(HI) = 2.0V min, V_EN(LO) = 0.4V max - compatible with 3.3V and 1.8V logic-level enable signals.
Thermal Shutdown	Triggers at +160°C with +20°C hysteresis - protects against sustained overload or poor PCB heatsinking.

Pinout & Package

AP7383-41WR-7 is packaged in SOT25 (WR variant), a 5-pin surface-mount package with exposed pad for thermal dissipation. Pin 1 is VIN, Pin 2 is GND, Pin 3 is VOUT, Pin 4 is NC (not connected; recommended tied to GND), and Pin 5 is EN. The WR package has θ_JA = 166°C/W on JEDEC High-K board.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply connection; accepts 3.5–30V with transient robustness up to 33V absolute max.
2	GND	Analog and power ground reference; must be low-impedance for stability and thermal conduction.
3	VOUT	Regulated 4.15V output; requires ≥1µF ceramic capacitor placed adjacent to pin per layout guidelines.
4	NC	No internal connection; tie to GND to improve thermal performance and reduce EMI susceptibility.
5	EN	Active-high enable input; pulls device into ultra-low standby mode (<0.01µA) when driven <0.4V.

Key Features

Feature	Design Value
Wide-input operation	3.5–30V input range enables single-regulator support across multiple industrial and USB-C PD adapter outputs.
Ultra-low quiescent current	1.8–3.0µA ground current preserves battery life in sleep-mode IoT nodes and portable medical devices.
Ceramic capacitor compatibility	Stable with ≥1µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics.
Fixed 4.15V output	Optimized for 4.2V Li-ion battery systems where 4.15V avoids overvoltage stress on downstream 4.2V-tolerant ICs.
Thermal protection	+160°C shutdown with +20°C hysteresis prevents latch-up during short-circuit or ambient overheating events.

Applications

USB-Powered Test Equipment

Portable Data Loggers

Use Scenario: Handheld multimeters and oscilloscope probes powered via USB 5V bus with variable load and ambient temperature shifts.

IC Role / Device Role / Timing Role: Primary 4.15V LDO supplying analog front-end and MCU core, replacing switching regulators to eliminate noise-sensitive ripple.

Use Value: 0.05%/V line regulation maintains ADC reference stability despite USB port voltage sag under load; 1.8µA quiescent current extends battery-backed runtime between charges.

Use Scenario: Battery-operated environmental monitors logging temperature/humidity every 10 seconds using BLE or LoRaWAN.

IC Role / Device Role / Timing Role: Always-on 4.15V regulator powering RTC, sensor interface, and RF transceiver in deep-sleep cycles.

Use Value: EN pin enables full system shutdown between readings; thermal shutdown prevents damage during extended outdoor exposure above 60°C ambient.

Industrial Sensor Nodes

Medical Wearables

Use Scenario: DIN-rail mounted condition monitoring units with 24V DC input and isolated 4.15V sensor supply rails.

IC Role / Device Role / Timing Role: Post-isolation LDO delivering clean 4.15V to MEMS accelerometers and signal-conditioning op-amps.

Use Value: 0.5% load regulation ensures consistent sensor biasing across 1–150mA dynamic current draw; 30V abs-max rating withstands 24V system transients.

Use Scenario: ECG patch devices with coin-cell battery and Bluetooth LE radio requiring precise 4.15V for analog front-end amplification.

IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO supplying analog signal chain and BLE SoC VDDIO rail.

Use Value: 500mV dropout at 50mA allows >90% battery utilization from 3.0V cutoff; ±100ppm/°C tempco maintains gain calibration across body-worn temperature ranges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output ULDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703T-4102E/MB	4.1V output (±2%), 250mV dropout @ 250mA, 3µA IQ, SOT23-5 package	Higher dropout margin but lower accuracy; lacks thermal shutdown	Select if higher current headroom needed and thermal protection is handled externally.
Torex XC6219B412MR-G	4.1V output (±2%), 170mV dropout @ 100mA, 1µA IQ, SOT25 package	Lower dropout and IQ, but no EN pin or thermal shutdown; tighter output tolerance not guaranteed	Select for ultra-low-power applications where enable control and fault protection are not required.

Compared with MCP1703T-4102E/MB and XC6219B412MR-G, AP7383-41WR-7 uniquely combines 4.15V precision, integrated EN, thermal shutdown, and 30V input capability in a single SOT25 footprint-making it optimal for ruggedized, feature-complete portable designs where reliability and design simplicity are prioritized over minimal IQ.

Availability

AP7383-41WR-7 is available at Aetrix Electronics and suitable for USB-powered instrumentation, portable data loggers, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AP7383-41WR-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 manufacturing certified to IATF 16949 and product compliance to AEC-Q200.

The AP7383 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding precision, low IQ, and robust fault protection.

FAQ

What is the minimum input voltage required for AP7383-41WR-7 to regulate 4.15V at 100mA?

The datasheet specifies a typical dropout voltage of 750mV at 100mA. Therefore, the minimum input voltage is 4.15V + 0.75V = 4.90V. This ensures stable regulation under worst-case conditions including temperature variation and part-to-part tolerance. Operation below this voltage results in pass transistor saturation and unregulated output.

Can AP7383-41WR-7 be used with a 10µF aluminum electrolytic capacitor instead of ceramic?

No-AP7383-41WR-7 is optimized for low-ESR ceramic capacitors (≥1µF X5R/X7R). Aluminum electrolytics typically exhibit ESR >100mΩ and capacitance drift, which can cause instability, overshoot, or oscillation. The datasheet explicitly states "Compatible with Low ESR Ceramic Capacitor" and shows stability only with 1µF ceramics in typical application circuits.

Is the NC pin (Pin 4) required to be grounded on the PCB?

Yes-the NC pin is not internally connected but serves as a thermal pad extension. Diodes recommends tying Pin 4 to GND to maximize copper area for heat dissipation, reducing θ_JA by up to 20°C/W in standard layouts. Leaving it floating degrades thermal performance and may increase junction temperature beyond safe limits at full load.

Does AP7383-41WR-7 meet AEC-Q200 for automotive use?

No-AP7383-41WR-7 is not qualified to AEC-Q200. The datasheet notes that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing; those parts carry separate part numbers (e.g., AP7383-41WR-7Q) and are explicitly marked as "automotive" in ordering information. This variant is intended for industrial and consumer applications.

AP7383-41WR-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):: 30V

Voltage - Output (Min/Fixed):: 4.1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 1.5V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 3 µA

Current - Supply (Max):: 3 µA

PSRR:: -

Control Features:: -

Protection Features:: Current Limit, Thermal Shutdown

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7383-41WR-7 FAQ

1.How can I place an order for AP7383-41WR-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7383-41WR-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 AP7383-41WR-7 reliable?

The price and inventory of AP7383-41WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-41WR-7 is usually 5 days.

3.What payment methods are accepted for AP7383-41WR-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-41WR-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7383-41WR-7?

AP7383-41WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7383-41WR-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 AP7383-41WR-7?

For technical support, including AP7383-41WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-41WR-7 requirements.

6.How does Aetrix verify that AP7383-41WR-7 is sourced from the original manufacturer or authorized distributors?

All AP7383-41WR-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 AP7383-41WR-7 meets industry standards.

7.What is the process for return or replacement of AP7383-41WR-7?

All AP7383-41WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-41WR-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 AP7383-41WR-7 part is unused and in its original packaging.

Return procedure for AP7383-41WR-7:

1.Submit a request within 90 days.

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

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