Diodes Incorporated APX803L-30W5-7

Overview

APX803L-30W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 220ms reset timeout. It delivers active-low open-drain reset signaling in battery-powered IoT sensors and portable medical monitors where low quiescent power and reliable power-on reset are critical.

For engineers reviewing the APX803L-30W5-7 datasheet, APX803L-30W5-7 pinout, APX803L-30W5-7 application, or APX803L-30W5-7 equivalent, this page details its fixed-threshold supervision function, SOT25 package compatibility, reset timing behavior across temperature, and direct substitution options for 3.0V system monitoring in space-constrained embedded designs.

Technical Context

The APX803L-30W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent chatter during VCC recovery. Its comparator continuously monitors VCC against a factory-trimmed 3.0V threshold and asserts RESET when VCC drops below 2.955V (VTH – 1.5%).

Reset assertion remains active for exactly 220ms after VCC exceeds 3.045V (VTH + 1.5%), per the -20 suffix in the part number, with propagation delay under 20µs. The open-drain output supports pull-up to any voltage ≤5.5V, independent of VCC.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 0.95mm height; pin 4 and 5 are no-connect (NC), enabling backward-compatible layout with 3-pin variants while preserving thermal performance (θJA = 200°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L-30W5-7, the SA variant saves board space but offers identical supervision performance, while the TLV803EB30DBZR adds automotive qualification at the cost of layout incompatibility and tighter supply current tolerance.

Availability

APX803L-30W5-7 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart home sensor hubs, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for APX803L-30W5-7 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 solutions, with design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.

The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and energy-sensitive embedded systems.

FAQ

What is the exact reset timeout duration for APX803L-30W5-7?

The APX803L-30W5-7 provides a guaranteed 220ms reset active timeout period after VCC recovers above the threshold. This value is factory-programmed and specified as 143ms (min) to 297ms (max) over temperature, with typical performance tightly centered at 220ms per the -20 suffix in the part number.

Can APX803L-30W5-7 monitor a 1.8V supply rail?

No - the APX803L-30W5-7 is configured for 3.0V threshold detection and requires VCC ≥ 0.9V to operate, but it only asserts reset when the monitored voltage falls below 3.0V ±1.5%. To supervise a 1.8V rail, select APX803L-18W5-7 or APX803L-18SA-7 instead.

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

Yes - the RESET pin is open-drain and must be pulled up to a valid logic voltage (≤5.5V) via an external resistor. Typical values range from 10kΩ (for low power) to 4.7kΩ (for faster rise time); the datasheet recommends 100kΩ for battery-critical applications.

Does APX803L-30W5-7 support operation down to 0.9V VCC?

Yes - the device functions across VCC = 0.9V to 5.5V, but threshold detection accuracy degrades below 1.5V. At 0.9V, the internal reference remains active and reset assertion is still guaranteed, though propagation delay increases to ~50µs and supply current rises to ~1.8µA.