Diodes Incorporated APX803L05-13SA-7

Overview

APX803L05-13SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 5.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms reset timeout. It delivers active-low open-drain reset signaling in battery-powered IoT sensors, portable medical devices, and industrial microcontroller systems requiring reliable power-up sequencing.

For engineers reviewing the APX803L05-13SA-7 datasheet, APX803L05-13SA-7 pinout, APX803L05-13SA-7 application, or APX803L05-13SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, low-quiescent-current operation under brown-out conditions, and SOT23 package compatibility with high-density PCB layouts.

Technical Context

The APX803L05-13SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 5.0V detection threshold, with built-in hysteresis (0.01×VTH) preventing oscillation during slow-rising or noisy supply transitions. Its internal circuitry ensures reset assertion within 20µs of VCC falling below threshold and holds reset until VCC exceeds 5.0V by at least the hysteresis margin.

This variant implements a factory-programmed 55ms recovery delay (tDELAY), achieved via on-chip RC timing-no external capacitor required-and maintains output sink capability up to 3.5mA while operating across -40°C to +85°C ambient range with supply voltage from 0.9V to 5.5V.

Key Specifications

Pinout & Package

SOT23-3 package: ultra-compact surface-mount outline with 0.95mm pitch, JEDEC MO-178 compliant, suitable for space-constrained embedded designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01QDBVRQ1 and MAX809SEUR+T, the APX803L05-13SA-7 delivers optimal balance of ultra-low ICC, factory-set 5.0V/55ms precision, and zero-component implementation-making it superior for cost-sensitive, space-constrained 5V µP supervision where fixed timing suffices.

Availability

APX803L05-13SA-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and USB-C power delivery adapters requiring stable component supply across production lifecycles.

Supply support for APX803L05-13SA-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy monitoring in battery-operated and energy-conscious embedded systems.

FAQ

What is the exact reset threshold voltage for APX803L05-13SA-7?

The APX803L05-13SA-7 has a factory-trimmed reset threshold of 5.0V with ±1.5% accuracy over temperature (–40°C to +85°C). This means the actual trip point falls between 4.925V and 5.075V at +25°C, and remains within ±1.5% across the full operating range per datasheet DS38171 Rev. 3–2.

Can APX803L05-13SA-7 operate with a 3.3V supply rail?

Yes-the device monitors its own VCC pin and functions correctly when VCC = 3.3V, provided the monitored rail is also 3.3V and the 5.0V threshold is appropriate for detecting failure of a higher auxiliary supply (e.g., 5V LDO feeding the 3.3V regulator). It does not regulate; it supervises.

Is an external pull-up resistor required on the RESET pin?

Yes-an external pull-up resistor (typically 10kΩ to host logic rail) is mandatory because the RESET pin is open-drain. Without it, the output cannot drive a valid HIGH logic level, rendering the reset signal non-functional in most µP reset input configurations.

Does APX803L05-13SA-7 support AEC-Q100 qualification?

No-APX803L05-13SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives like the APX803L05-42SA (marked "A442", status Active) in same SOT23 package but with extended temperature screening and PPAP-capable manufacturing per IATF 16949.