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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated APX803L20-46W5-7

Name: APX803L20-46W5-7
Brand: Diodes Incorporated
SKU: APX803L20-46W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-46W5-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: APX803L20-46W5-7.pdf

Description:: Reset Generator SOT25 T&R 3K

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Product details

Overview

APX803L20-46W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring V_CC in battery-powered and embedded digital systems. It features a fixed 4.6V detection threshold (±1.5% accuracy), 220ms reset timeout, open-drain active-low RESET output, and consumes only 1µA typical supply current. Used in portable instrumentation and low-power microcontroller power-up sequencing.

For engineers reviewing the APX803L20-46W5-7 datasheet, APX803L20-46W5-7 pinout, APX803L20-46W5-7 application, or APX803L20-46W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L20-46W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×V_TH) to prevent oscillation during threshold crossing. Its reset logic asserts low on V_CC drop below 4.6V and holds until V_CC exceeds 4.6V + hysteresis, with guaranteed 20µs response time.

It operates across –40°C to +85°C ambient, maintains ±1.5% threshold accuracy over temperature (50 ppm/°C drift), and delivers stable 220ms reset timeout (143–297ms range) independent of supply voltage between 0.9V and 5.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Detection Threshold	4.6V ±1.5% - precise brown-out detection for 5V-tolerant µP systems
Reset Timeout	220ms (typ.) - ensures reliable processor initialization after power recovery
Supply Current	1.0µA (typ.), 2.5µA (max.) - negligible load on coin-cell or energy-harvesting supplies
Output Type	Open-drain, active-low - enables wired-OR reset bus and flexible pull-up voltage selection
Response Time	≤20µs - fast assertion prevents µP corruption during rapid V_CC collapse
Operating Voltage	0.9V to 5.5V - supports operation down to near-threshold conditions for ultra-low-V_CC monitoring
Temperature Range	–40°C to +85°C - qualified for industrial and extended-temperature embedded applications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 1.1mm height; RoHS-compliant, lead-free, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for internal comparator and output stage
2	RESET	Open-drain active-low reset signal; sinks up to 20mA, max 0.4V at 3.5mA
3	V_CC	Power input; supplies internal reference and logic; operates from 0.9V to 5.5V
4, 5	NC	No connection - electrically isolated, no internal bonding or function

Key Features

Feature	Design Value
Fixed 4.6V threshold	Eliminates external resistor network; reduces BOM count and layout area
220ms factory-set delay	Guarantees sufficient hold time for slow-ramping power rails without external timing capacitor
1µA typical supply current	Enables multi-year operation on primary lithium batteries in IoT endpoint devices
±1.5% threshold accuracy	Reduces design margin requirements versus lower-accuracy supervisors, improving system robustness
Open-drain output	Supports mixed-voltage reset buses and simplifies level-shifting in multi-rail systems

Applications

Battery-Powered Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Continuous glucose monitor with CR2032 coin cell and ARM Cortex-M0+ MCU.

IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; asserts RESET if voltage sags below 4.6V due to battery aging or cold-temperature impedance rise.

Use Value: Prevents firmware execution under marginal supply, avoiding memory corruption and false sensor readings.

Use Scenario: DIN-rail mounted remote I/O unit with isolated 24V DC input and 3.3V logic rail.

IC Role / Device Role / Timing Role: Supervises 3.3V FPGA configuration supply; provides 220ms reset pulse to ensure full FPGA reconfiguration after power interruption.

Use Value: Guarantees deterministic startup sequence without external RC timing components.

Smart Home Hub Power Management

Automotive Body Control Module (Non-AEC)

Use Scenario: Wi-Fi-enabled home automation hub powered by USB-C PD (5V) with buck converter to 3.3V.

IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during transient load surges; holds RESET until rail stabilizes above 4.6V + hysteresis.

Use Value: Avoids spurious reboots during concurrent BLE/Wi-Fi transmission bursts.

Use Scenario: Aftermarket lighting controller using 12V automotive supply stepped down to 5V/3.3V.

IC Role / Device Role / Timing Role: Monitors 5V microcontroller supply; triggers hardware reset during cranking-induced dip (6–8V transients).

Use Value: Maintains functional safety by ensuring MCU restarts cleanly after voltage recovery.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
APX803L20-46SA-7	SOT23-3 package (3-pin); identical electrical specs but smaller footprint and no NC pins	Better suited for space-constrained designs where 5-pin routing is impractical	Select when board real estate is critical and thermal dissipation < 200°C/W suffices
TLV803E46DBVR	Texas Instruments part; same 4.6V threshold, 200ms delay, but higher 2.5µA max ICC and ±2.5% accuracy	Limited to commercial temp range (–40°C to +125°C), no SOT25 option	Choose only if TI supply chain preference outweighs tighter accuracy and industrial temp compliance

Compared with APX803L20-46SA-7, the W5 variant offers improved thermal performance (200°C/W vs. 275°C/W in SOT323) and mechanical robustness via two NC pins; versus TLV803E46DBVR, it delivers superior accuracy (±1.5% vs. ±2.5%) and guaranteed industrial temperature operation.

Availability

APX803L20-46W5-7 is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, and smart home hub power management requiring stable component supply across long production lifecycles.

Supply support for APX803L20-46W5-7 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 for power management, signal integrity, and protection applications.

The APX803L series belongs to Diodes' µP supervisor product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in portable and industrial embedded systems.

FAQ

What is the exact reset timeout value for APX803L20-46W5-7, and how does temperature affect it?

The APX803L20-46W5-7 has a nominal reset timeout of 220ms at +25°C, with a guaranteed range of 143ms to 297ms across –40°C to +125°C. The datasheet's timing graph shows monotonic increase from ~150ms at –40°C to ~240ms at +125°C, confirming stable behavior without discontinuities.

Can APX803L20-46W5-7 be used with a 2.8V supply rail?

No - the device requires V_CC ≥ 0.9V to operate, but its 4.6V detection threshold means it must monitor a rail ≥ 4.6V. It cannot supervise 2.8V directly; use APX803L20-28W5-7 (2.8V threshold) instead for that voltage level.

Does the SOT25 package's NC pins require PCB routing or grounding?

No - pins 4 and 5 are unconnected internally and must remain floating on the PCB. Neither routing nor grounding is required or recommended; leaving them unconnected avoids unintended parasitic coupling or ESD paths.

How does the 1µA supply current impact battery life in a CR2032-powered device?

At 1µA typical current draw, APX803L20-46W5-7 consumes just 8.64mC/day. Over a typical CR2032 capacity of 220mAh (792C), this extends usable battery life by >25 years - effectively making quiescent current negligible in lifetime calculations.

APX803L20-46W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Type:: Voltage Detector

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.6V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 143ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

APX803L20-46W5-7 FAQ

1.How can I place an order for APX803L20-46W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-46W5-7 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 APX803L20-46W5-7 reliable?

The price and inventory of APX803L20-46W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-46W5-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-46W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-46W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-46W5-7?

APX803L20-46W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-46W5-7 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 APX803L20-46W5-7?

For technical support, including APX803L20-46W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-46W5-7 requirements.

6.How does Aetrix verify that APX803L20-46W5-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-46W5-7 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 APX803L20-46W5-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-46W5-7?

All APX803L20-46W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-46W5-7, 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 APX803L20-46W5-7 part is unused and in its original packaging.

Return procedure for APX803L20-46W5-7:

1.Submit a request within 90 days.

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

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