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

Diodes Incorporated AP7383-44FDC-7

Name: AP7383-44FDC-7
Brand: Diodes Incorporated
SKU: AP7383-44FDC-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7383-44FDC-7

Manufacturer:: Diodes Incorporated

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

Package:: 6-UDFN Exposed Pad

Datasheet:: AP7383-44FDC-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:1,013

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Product details

Overview

AP7383-44FDC-7 from Diodes Incorporated is a fixed-output 4.4V, 150mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package. It operates across 3.5–30V input range, delivers ±1% output voltage accuracy at 10mA load, features 360mV typical dropout at 50mA, and draws only 1.8µA ground current-enabling long battery life in portable instrumentation and USB-powered sensors.

For engineers reviewing the AP7383-44FDC-7 datasheet, AP7383-44FDC-7 pinout, AP7383-44FDC-7 application, or AP7383-44FDC-7 equivalent, key selection criteria include its 4.4V fixed output, thermal shutdown at +160°C, compatibility with 1µF ceramic capacitors, and support for high-temperature operation up to +125°C junction.

Technical Context

The AP7383-44FDC-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 4.4V output, current-limit circuit (150mA), and enable control logic. Its internal architecture supports stable regulation under fast load transients while maintaining ultra-low quiescent current.

It implements thermal shutdown with +20°C hysteresis and uses a chip-enable input (EN) referenced to GND, allowing external control of regulator operation. The device is optimized for low-ESR ceramic output capacitors and exhibits 0.05%/V line regulation and 0.5% load regulation over full operating conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 4.4V ±1% at 10mA - ensures stable supply for 4.3–4.5V-tolerant ICs like microcontrollers and analog sensors.
Input Voltage Range	3.5V to 30V - supports direct connection to 5V, 9V, 12V, and 24V rails without pre-regulation.
Max Output Current	150mA - sufficient for powering low-power MCUs, RF modules, and sensor signal chains.
Dropout Voltage	360mV typ @ 50mA - enables regulation down to VIN = 4.76V, critical for battery systems near end-of-discharge.
Ground Current	1.8µA typ @ IOUT = 0A - minimizes standby power loss in always-on monitoring circuits.
Thermal Shutdown	+160°C with +20°C hysteresis - protects against sustained overload or poor PCB thermal design.
Line Regulation	0.05%/V - maintains tight output stability despite input rail fluctuations in automotive or industrial environments.

Pinout & Package

AP7383-44FDC-7 is housed in a 2.0mm × 2.0mm, 0.65mm height U-DFN2020-6 (Type C) package with wettable flank leads, rated Moisture Sensitivity Level 1 per J-STD-020 and NiPdAu-plated copper leadframe.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply connection; accepts 3.5–30V; requires local 1µF ceramic decoupling.
2	GND	Power ground reference; must be connected to low-impedance PCB ground plane for thermal and noise performance.
3	VOUT	Regulated 4.4V output; drives load and 1µF ceramic output capacitor.
4	NC	No internal connection; recommended to tie to GND for enhanced thermal dissipation via PCB copper.
5	NC	No internal connection; recommended to tie to GND for enhanced thermal dissipation via PCB copper.
6	EN	Active-high enable input; ≥2.0V enables regulation, ≤0.4V disables output and reduces IQ to 0.01µA.

Key Features

Feature	Design Value
Wide Input Range	3.5–30V operation eliminates need for upstream buck converter in multi-rail systems.
Ultra-Low Quiescent Current	1.8µA ground current extends battery runtime in IoT endpoint devices with infrequent wake cycles.
Low-ESR Ceramic Cap Support	Stable with 1µF X5R/X7R ceramics - reduces BOM count and board space vs. tantalum or aluminum electrolytics.
Thermal Protection	Auto-recovery shutdown at +160°C prevents permanent damage during transient overloads or poor heatsinking.
High Accuracy Output	±1% initial tolerance ensures reliable operation of ADC references and voltage-sensitive analog front-ends.

Applications

Portable Medical Sensors

USB-Powered Test Equipment

Use Scenario: Continuous glucose monitor with BLE radio and low-power op-amps running from single Li-ion cell (3.0–4.2V) plus boost stage.

IC Role / Device Role / Timing Role: Post-regulator delivering clean, stable 4.4V to analog sensor interface and RF transceiver.

Use Value: 360mV dropout allows regulation until battery drops to ~4.76V, extending usable runtime by >12% versus higher-dropout alternatives.

Use Scenario: Handheld oscilloscope probe powered via USB 5V bus with internal 4.4V rail for ADC driver and FPGA I/O.

IC Role / Device Role / Timing Role: Primary LDO supplying noise-sensitive analog signal path and digital core logic.

Use Value: 0.05%/V line regulation rejects USB port ripple and shared-rail noise, improving ENOB by ≥0.8 bits.

Industrial Data Loggers

Automotive Cabin Sensors

Use Scenario: Remote environmental logger using LoRaWAN, operating from 12V vehicle battery or solar-charged LiFePO₄ pack.

IC Role / Device Role / Timing Role: Main system regulator converting wide-input 6–30V to precise 4.4V for MCU, RTC, and EEPROM.

Use Value: 30V max input withstands load-dump transients; thermal shutdown prevents failure during enclosure overheating.

Use Scenario: Occupancy sensor module mounted near HVAC ducts, exposed to ambient -40°C to +105°C.

IC Role / Device Role / Timing Role: Power management IC providing regulated 4.4V to PIR detector and CAN transceiver interface.

Use Value: Guaranteed operation to +125°C junction temperature and ±100ppm/°C tempco ensure consistent sensor biasing across full automotive thermal range.

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-4402E/MB	4.4V output, 250mA rating, 600mV dropout @ 250mA, 2.5µA IQ, SOT23-5 package.	Higher current capability but larger dropout limits use below 5.0V input; no EN pin in this variant.	Select when >150mA load or SOT23 footprint required; avoid if EN control or minimal dropout is critical.
Torex XC6219B442MR-G	4.4V output, 150mA rating, 350mV dropout @ 100mA, 1µA IQ, SOT25 package.	Lower IQ and similar dropout, but only rated to +85°C ambient (vs. +125°C TJ for AP7383).	Select for ultra-low-power battery apps <85°C ambient; avoid for industrial/high-temp deployments.

Compared with MCP1703T-4402E/MB and XC6219B442MR-G, the AP7383-44FDC-7 uniquely combines 4.4V precision, 150mA capability, +125°C junction rating, active enable control, and 2.0mm² DFN footprint-making it optimal for space-constrained, thermally demanding, and battery-sensitive designs.

Availability

AP7383-44FDC-7 is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered test equipment, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AP7383-44FDC-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 industrial, computing, and consumer markets.

The AP7383 series belongs to Diodes' ultra-low dropout linear regulator product line, engineered specifically for battery-powered and wide-input industrial applications where precision, efficiency, and thermal robustness are critical.

FAQ

What is the minimum input voltage required for AP7383-44FDC-7 to maintain regulation?

The AP7383-44FDC-7 requires a minimum input voltage of 3.5V to operate within specification. At 50mA load, its typical dropout is 360mV, so VIN must be ≥4.76V to sustain 4.4V output. Below 3.5V, the device enters undervoltage lockout and ceases regulation.

Can AP7383-44FDC-7 be used with ceramic output capacitors smaller than 1µF?

No-Diodes specifies a minimum 1µF ceramic output capacitor (X5R/X7R) for stability. Using smaller values risks oscillation or degraded load transient response. The device is not characterized for <1µF, and layout parasitics become dominant below this threshold.

Does AP7383-44FDC-7 support reverse polarity protection?

No-the AP7383-44FDC-7 has no built-in reverse-voltage protection. Applying negative voltage to VIN or VOUT can cause irreversible damage. External protection (e.g., series Schottky diode or ideal diode controller) is required in systems prone to reverse connection.

Is AP7383-44FDC-7 qualified for automotive applications?

AP7383-44FDC-7 is not AEC-Q100 qualified. While it operates from -40°C to +125°C junction temperature, Diodes explicitly states that automotive-grade variants require separate PPAP-capable part numbers and IATF 16949 manufacturing. This part is intended for industrial and commercial use only.

AP7383-44FDC-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-UDFN Exposed Pad

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):: 4.4V

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:: Over Current, Over Temperature

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: U-DFN2020-6 (Type C)

AP7383-44FDC-7 FAQ

1.How can I place an order for AP7383-44FDC-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7383-44FDC-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 AP7383-44FDC-7 reliable?

The price and inventory of AP7383-44FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-44FDC-7 is usually 5 days.

3.What payment methods are accepted for AP7383-44FDC-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-44FDC-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7383-44FDC-7?

AP7383-44FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7383-44FDC-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 AP7383-44FDC-7?

For technical support, including AP7383-44FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-44FDC-7 requirements.

6.How does Aetrix verify that AP7383-44FDC-7 is sourced from the original manufacturer or authorized distributors?

All AP7383-44FDC-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 AP7383-44FDC-7 meets industry standards.

7.What is the process for return or replacement of AP7383-44FDC-7?

All AP7383-44FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-44FDC-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 AP7383-44FDC-7 part is unused and in its original packaging.

Return procedure for AP7383-44FDC-7:

1.Submit a request within 90 days.

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

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