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

Diodes Incorporated AP7375-50Y-13

Name: AP7375-50Y-13
Brand: Diodes Incorporated
SKU: AP7375-50Y-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7375-50Y-13

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AP7375-50Y-13.pdf

Description:: IC REG LIN 5V 300MA SOT89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7375-50Y-13 from Diodes Incorporated is a 5.0V fixed-output, wide-input (3–45V), 300mA ultra-low-dropout linear regulator in SOT89-3 package with 2.1μA quiescent current, 35mV dropout at 10mA, and integrated enable pin rated to 45V - deployed in battery-powered smoke detectors for long-life standby operation.

For engineers reviewing the AP7375-50Y-13 datasheet, AP7375-50Y-13 pinout, AP7375-50Y-13 application, or AP7375-50Y-13 equivalent, key selection criteria include input voltage range up to 45V, EN pin tolerance, thermal shutdown threshold (+150°C), ±2% output accuracy, and SOT89-3 thermal resistance (95°C/W).

Technical Context

The AP7375-50Y-13 uses a PMOS pass transistor architecture enabling true low-dropout operation down to 35mV at light load and maintaining regulation across 3V–45V input without external bias. Its EN pin accepts up to 45V directly, eliminating level-shifting circuitry in high-voltage industrial sensor nodes.

Internal protection includes current limiting (500mA typical), thermal shutdown with +20°C hysteresis, and fast transient response (<1ms recovery) ensuring stable 5.0V output during load steps from 10mA to 300mA - critical for microcontroller brown-out immunity in home appliance control modules.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±2% - ensures reliable logic-level compatibility with 5V MCU peripherals and sensors.
Input Voltage Range	3V to 45V - supports direct connection to 12V/24V/36V industrial rails and automotive battery systems.
Max Output Current	300mA continuous - sufficient to power ARM Cortex-M0+ MCUs, RF transceivers, and analog front-ends.
Quiescent Current	2.1μA typical - enables >10-year battery life in smoke detectors using CR123A cells.
Dropout Voltage	35mV @ 10mA / 350mV @ 100mA - maintains regulation even under cold-cranking (6.5V) or depleted battery (7V) conditions.
PSRR	85dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input.
Thermal Shutdown	+150°C with +20°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking.

Pinout & Package

SOT89-3 (Package Code: Y) package with exposed tab for thermal enhancement; 3-pin surface-mount device requiring minimum 1.5mm² copper pour connected to GND for optimal thermal dissipation (θ_JA = 95°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 (Tab)	Exposed Pad (EP)	Not electrically connected; must be soldered to large GND copper area for thermal relief - not used as primary GND path.
1	VIN	Main input supply pin - accepts 3–45V; requires 1μF ceramic decoupling capacitor placed adjacent to pin.
2	GND	Analog/digital ground reference - connects to system GND plane with low-impedance trace to minimize noise coupling.
3	VOUT	Regulated 5.0V output - requires 10μF X7R ceramic capacitor placed within 2mm of pin for stability and transient response.

Key Features

Feature	Design Value
Wide VIN range (3–45V)	Eliminates need for pre-regulator in 24V industrial I/O modules, reducing BOM count and board space.
EN pin rated to 45V	Allows direct interface with high-side switch controllers or PLC output signals without external resistive divider.
No overshoot at startup	Ensures safe power sequencing for EEPROMs and ADCs that cannot tolerate overvoltage stress during power-up.
Short-circuit protection	Limits output current to ~500mA during fault, preventing thermal runaway when VOUT is accidentally shorted to GND.
Lead-free & RoHS 3 compliant	Meets IPC-J-STD-020 moisture sensitivity Level 1 - suitable for standard reflow without baking.

Applications

Smoke Detectors

Industrial Sensors

Use Scenario: Standby operation powered by lithium thionyl chloride (LiSOCl₂) battery with 3.6V nominal voltage and 30-year shelf life.

IC Role / Device Role / Timing Role: Primary 5V regulator supplying MCU, optical chamber circuitry, and RF alarm transmitter.

Use Value: 2.1μA quiescent current extends battery life beyond 10 years; 45V input tolerance accommodates initial battery voltage up to 3.9V and avoids premature cutoff.

Use Scenario: 2-wire loop-powered pressure transmitter operating from 24V DC supply with 4–20mA analog output.

IC Role / Device Role / Timing Role: Local 5V rail generator for signal conditioning amplifier and HART modem IC.

Use Value: 95°C/W θ_JA enables operation at full 300mA load in sealed enclosures; EN pin allows remote sleep/wake via PLC digital output.

Home Appliance Control

Microcontroller Power

Use Scenario: Embedded control board in washing machine with 12V auxiliary supply derived from main SMPS.

IC Role / Device Role / Timing Role: Clean 5V source for touch controller, display driver, and motor gate driver logic.

Use Value: 85dB PSRR rejects 100kHz switching noise from nearby DC-DC converter; fast line transient response prevents MCU reset during pump motor commutation.

Use Scenario: Low-power IoT node using STM32L0 series MCU with deep-sleep current <1μA.

IC Role / Device Role / Timing Role: Always-on 5V regulator enabling wake-on-external-interrupt functionality.

Use Value: 35mV dropout at 10mA ensures stable 5V output even when input drops to 5.035V - critical for brown-out detection margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361-50Y-13	Lower max current (150mA), same 5V output, identical SOT89-3 package and EN rating.	Insufficient for 300mA MCU + radio loads; suitable only for sensor-only nodes.	Select when load current ≤150mA and cost sensitivity outweighs headroom requirements.
MCP1703T-5002E/MB	45V input, 250mA output, 3μA IQ, but EN pin limited to 6V - requires external level shift.	Cannot interface directly with 24V control signals; adds component count and layout complexity.	Choose only if existing design already includes level-shifting circuitry and 250mA suffices.

Compared with AP7375-50Y-13, AP7361-50Y-13 trades 150mA output headroom for lower cost, while MCP1703T-5002E/MB sacrifices EN voltage tolerance and current capability - making AP7375-50Y-13 the sole option meeting 300mA, 45V-EN, and SOT89 thermal requirements simultaneously.

Availability

AP7375-50Y-13 is available at Aetrix Electronics and suitable for battery-powered equipment, smoke detectors and sensors, microcontroller applications, and home appliances requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AP7375-50Y-13 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 industrial, computing, consumer, and automotive markets.

The AP7375 series belongs to Diodes' high-voltage LDO portfolio designed specifically for battery-backed and wide-input industrial systems where ultra-low IQ, high VIN tolerance, and robust protection are mandatory.

FAQ

What is the maximum allowable input voltage for AP7375-50Y-13?

The absolute maximum input voltage is 55V, but the recommended operating range is 3V to 45V per the datasheet. Operation above 45V risks exceeding thermal limits under load and violates specified operating conditions - sustained use at 50V is not advised even if below absolute maximum ratings.

Does AP7375-50Y-13 require an external pull-up on the EN pin?

No external pull-up is required. The EN pin has internal logic-level thresholds: it enables the regulator when voltage exceeds 1V and disables it below 0.4V. For always-on operation, connect EN directly to VIN; for controlled enable, drive with a clean 0–45V logic signal.

Can AP7375-50Y-13 operate with only a 1μF output capacitor?

A 1μF ceramic capacitor meets minimum stability requirements, but the datasheet recommends ≥10μF for optimal load transient response and undershoot suppression. Using only 1μF may cause >100mV output dip during 300mA step loads - acceptable only in non-critical applications with relaxed regulation specs.

Is the exposed pad on AP7375-50Y-13 electrically connected to GND?

No - the exposed pad (Pin 1 Tab) is not internally connected to any circuit node. It must be soldered to a large GND copper area solely for thermal conduction; connecting it as the sole GND return path may compromise noise performance and reliability due to insufficient current-carrying capacity.

AP7375-50Y-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: AP7375

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 45V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.36V @ 100mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 5 µA

Current - Supply (Max):: -

PSRR:: -

Control Features:: Current Limit

Protection Features:: Over Current, Over Temperature, Short Circuit

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

AP7375-50Y-13 FAQ

1.How can I place an order for AP7375-50Y-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7375-50Y-13 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 AP7375-50Y-13 reliable?

The price and inventory of AP7375-50Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7375-50Y-13 is usually 5 days.

3.What payment methods are accepted for AP7375-50Y-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375-50Y-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7375-50Y-13?

AP7375-50Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7375-50Y-13 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 AP7375-50Y-13?

For technical support, including AP7375-50Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375-50Y-13 requirements.

6.How does Aetrix verify that AP7375-50Y-13 is sourced from the original manufacturer or authorized distributors?

All AP7375-50Y-13 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 AP7375-50Y-13 meets industry standards.

7.What is the process for return or replacement of AP7375-50Y-13?

All AP7375-50Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375-50Y-13, 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 AP7375-50Y-13 part is unused and in its original packaging.

Return procedure for AP7375-50Y-13:

1.Submit a request within 90 days.

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

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