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

Diodes Incorporated AP7383-33W5-7

Name: AP7383-33W5-7
Brand: Diodes Incorporated
SKU: AP7383-33W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7383-33W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7383-33W5-7.pdf

Description:: IC REG LIN 3.3V SOT25 T&R 3K

Quantity:: RFQ Add To RFQ list

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Inventory:8,323

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Product details

Overview

AP7383-33W5-7 from Diodes Incorporated is a fixed-output 3.3V, 150mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 30V max input voltage, 500mV dropout at 50mA, ±1% output accuracy, and 1.8µA ground current at zero load-designed for USB-powered instrumentation and portable battery systems requiring stable low-noise supply.

For engineers reviewing the AP7383-33W5-7 datasheet, AP7383-33W5-7 pinout, AP7383-33W5-7 application, or AP7383-33W5-7 equivalent, key selection criteria include wide-input capability (3.5–30V), thermal shutdown at +160°C, EN control logic compatibility, and ceramic capacitor support with 1µF C_IN/C_OUT.

Technical Context

The AP7383-33W5-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 3.3V output, current-limit circuit (150mA typical), and enable input-operating as a single-stage LDO without internal pass transistor gate drive complexity. Its architecture delivers high line regulation (0.05%/V) and load regulation (0.5%) across -40°C to +125°C junction temperature.

Thermal protection is implemented via junction-sensing shutdown at +160°C with +20°C hysteresis, while ultra-low quiescent current (1.8µA typ.) enables multi-year battery life in always-on sensor nodes. The device supports low-ESR ceramic capacitors exclusively-no tantalum or electrolytic requirement-and exhibits no stability issues down to 1µF output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±1% (ensures reliable 3.3V I/O rail for MCU peripherals)
Input Voltage Range	3.5V to 30V (supports direct connection to 24V industrial bus or Li-ion+ boost stages)
Max Output Current	150mA (sufficient for microcontrollers, sensors, and RF transceivers)
Dropout Voltage	360mV typ. @ 50mA (enables 3.65V min input for full 3.3V output under load)
Ground Current	1.8µA typ. @ I_OUT = 0mA (minimizes standby power in battery-critical designs)
Line Regulation	0.05%/V (maintains <±1.5mV output shift across full 3.5–30V input range)
Thermal Shutdown	+160°C with +20°C hysteresis (prevents latch-up during transient overloads)

Pinout & Package

SOT25 (W5) package: 5-pin surface-mount, 2.8mm × 2.9mm footprint, 1.05mm height, moisture sensitivity level 1, matte tin-plated leads.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply connection; accepts up to 30V DC with internal ESD protection
2	GND	Analog/digital ground reference; must be low-impedance PCB plane for stability
3	VOUT	Regulated 3.3V output; requires ≥1µF ceramic capacitor to GND within 5mm
4	EN	Active-high enable input; >2.0V enables regulation, <0.4V disables output (I_EN ≤1µA)
5	NC	No internal connection; recommended to tie to GND for thermal copper area enhancement

Key Features

Feature	Design Value
Wide Input Range	3.5–30V operation eliminates need for pre-regulation in 12/24V systems
Ultra-Low Quiescent Current	1.8µA ground current enables >10-year battery life in 10µA sleep-mode IoT nodes
Ceramic Capacitor Compatible	Stable with 1µF X5R/X7R MLCCs-reduces BOM cost and board space vs. tantalum
Enable Control Logic	CMOS-compatible EN pin allows precise power sequencing with µController GPIO
Thermal Protection	Auto-recovery shutdown prevents damage during sustained overload or poor heatsinking

Applications

USB-Powered Test Equipment

Industrial Sensor Node

Use Scenario: Handheld multimeter powered by USB-C 5V adapter with variable input due to cable drop.

IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying ADC, display driver, and microcontroller core.

Use Value: 30V input tolerance accommodates upstream boost converters; 0.5% load regulation ensures measurement accuracy across battery discharge.

Use Scenario: Wireless temperature sensor node using CR2032 coin cell with intermittent BLE transmission.

IC Role / Device Role / Timing Role: Always-on 3.3V regulator enabling ultra-low-power wake-up and sensor biasing.

Use Value: 1.8µA ground current extends CR2032 life beyond 5 years; EN pin synchronizes with MCU sleep cycles.

Portable Medical Monitor

Laptop Peripheral Dock

Use Scenario: Battery-backed pulse oximeter with dual Li-ion cells (6–8.4V) and USB fallback.

IC Role / Device Role / Timing Role: Clean 3.3V rail for analog front-end and optical sensor interface.

Use Value: Low noise and 0.05%/V line regulation prevent signal distortion during battery voltage sag.

Use Scenario: USB-C dock supplying 3.3V to HDMI bridge IC and USB hub controller.

IC Role / Device Role / Timing Role: Secondary LDO delivering regulated 3.3V from 5V USB-PD rail.

Use Value: 500mV dropout at 100mA allows operation even with 4.5V minimum PD negotiation voltage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	250mA rating, 17µA quiescent current, TO-92 package only	Larger through-hole footprint; higher IQ limits battery runtime	Select when leaded assembly or >150mA peak load required
Torex XC6206P332MR	150mA, 1µA IQ, but only 6V max input voltage	Unsuitable for 12/24V industrial inputs; limited to single-cell Li-ion or USB	Select only for low-voltage portable designs where 30V tolerance is unnecessary

Compared with MCP1700-3302E/TO and XC6206P332MR, the AP7383-33W5-7 uniquely balances 30V input capability, 1.8µA IQ, and SOT25 space efficiency-making it optimal for compact, wide-input, battery-sensitive applications where alternatives trade off voltage range, quiescent current, or package size.

Availability

AP7383-33W5-7 is available at Aetrix Electronics and suitable for USB-powered instrumentation, industrial sensor nodes, portable medical monitors, and laptop peripheral docks requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP7383-33W5-7 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 design centers in Asia, Europe, and the US, and manufacturing in certified ISO/TS 16949 and ISO 14001 facilities.

The AP7383 series belongs to Diodes' high-voltage ULDO product line, engineered specifically for battery-powered and industrial equipment needing robust input tolerance, ultra-low IQ, and guaranteed 150mA output in miniature packages.

FAQ

What is the minimum input voltage required for AP7383-33W5-7 to regulate 3.3V at 100mA?

The AP7383-33W5-7 requires VIN ≥ VOUT + VDROP. At 100mA, typical dropout is 750mV (max 1000mV per datasheet), so minimum VIN is 3.3V + 0.75V = 4.05V. The absolute minimum operating VIN is specified as 3.5V, but regulation margin degrades below 4.05V at full load.

Can AP7383-33W5-7 be used with aluminum polymer capacitors instead of ceramic?

No-the AP7383-33W5-7 is explicitly characterized and stabilized for use with low-ESR ceramic capacitors (1µF X5R/X7R). Aluminum polymer capacitors exhibit higher ESR and phase shift that may cause instability or oscillation; the datasheet does not validate or guarantee performance with non-ceramic types.

Is the EN pin internally pulled down when left unconnected?

No-the EN pin has no internal pull-down. When floating, leakage current may cause unpredictable enable/disable behavior. The datasheet specifies connecting EN to GND via a 100kΩ resistor or driving it actively to ensure defined state; NC pin (Pin 5) should be tied to GND for thermal benefit but is electrically isolated.

Does AP7383-33W5-7 support reverse polarity protection on the input?

No-the AP7383-33W5-7 lacks integrated reverse-voltage protection. Applying negative voltage to VIN relative to GND exceeds absolute maximum rating (−0.3V) and risks permanent damage. External protection (e.g., series Schottky diode or ideal diode controller) is required in systems prone to reverse connection.

AP7383-33W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 30V

Voltage - Output (Min/Fixed):: 3.3V

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:: Enable

Protection Features:: Current Limit, Thermal Shutdown

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7383-33W5-7 FAQ

1.How can I place an order for AP7383-33W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7383-33W5-7 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 AP7383-33W5-7 reliable?

The price and inventory of AP7383-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-33W5-7 is usually 5 days.

3.What payment methods are accepted for AP7383-33W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-33W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7383-33W5-7?

AP7383-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7383-33W5-7 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 AP7383-33W5-7?

For technical support, including AP7383-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-33W5-7 requirements.

6.How does Aetrix verify that AP7383-33W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7383-33W5-7 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 AP7383-33W5-7 meets industry standards.

7.What is the process for return or replacement of AP7383-33W5-7?

All AP7383-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-33W5-7, 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 AP7383-33W5-7 part is unused and in its original packaging.

Return procedure for AP7383-33W5-7:

1.Submit a request within 90 days.

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

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