Diodes Incorporated APX803L20-22W5-7

Overview

APX803L20-22W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 2.2V detection threshold (±1.5% accuracy), 220ms reset timeout, open-drain active-low RESET output, and consumes only 1µA typical supply current. Used in portable equipment where low quiescent power and precise brown-out protection are critical.

For engineers reviewing the APX803L20-22W5-7 datasheet, APX803L20-22W5-7 pinout, APX803L20-22W5-7 application, or APX803L20-22W5-7 equivalent, key selection factors include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT25 package compatibility with space-constrained PCB layouts.

Technical Context

The APX803L20-22W5-7 implements a precision bandgap-based voltage reference and comparator circuit to detect when VCC falls below 2.2V. Its internal hysteresis (0.01 × VTH) prevents oscillation during slow-rising or noisy supply transitions.

It delivers a clean, fast-reset signal with ≤20µs response time from VCC drop to RESET assertion and maintains reset state until VCC exceeds 2.2V + hysteresis. The 220ms timeout (typ. 220ms, min 143ms, max 297ms at +25°C) is factory-trimmed and stable across -40°C to +85°C operating range.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 3 functional pins (VCC, RESET, GND) and 2 no-connect (NC) terminals. Compact 2.9mm × 1.6mm footprint with 0.95mm height, optimized for automated assembly and high-density routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E22DBVR and MAX809SEUR+T, the APX803L20-22W5-7 offers superior current efficiency (1µA vs. 0.5µA/10µA) and tighter threshold accuracy (±1.5% vs. ±2% / ±2.5%), while its SOT25 package improves thermal dissipation and solder joint reliability in thermally cycled environments.

Availability

APX803L20-22W5-7 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial controller modules, and medical wearables requiring stable component supply and long-term production continuity.

Supply support for APX803L20-22W5-7 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 power monitoring in portable and embedded systems where battery longevity and deterministic reset behavior are essential.

FAQ

What is the exact reset timeout value for APX803L20-22W5-7 at 25°C?

The APX803L20-22W5-7 has a nominal reset timeout of 220ms at +25°C, with a guaranteed range of 143ms (minimum) to 297ms (maximum) under recommended operating conditions. This value is factory-trimmed and does not require external timing components.

Can APX803L20-22W5-7 drive a 10kΩ pull-up resistor to 3.3V?

Yes. With VOL ≤ 0.4V at ISINK = 3.5mA, the APX803L20-22W5-7 can reliably drive a 10kΩ pull-up to 3.3V, resulting in <0.33mA sink current and <0.33V logic-low voltage-well within standard CMOS input thresholds.

Is the 2.2V threshold calibrated across temperature?

Yes. The APX803L20-22W5-7 exhibits a temperature coefficient of ±50ppm/°C for its 2.2V threshold, meaning drift is limited to ±11mV over the full -40°C to +85°C range-ensuring consistent detection performance without external compensation.

Does the SOT25 package offer better thermal performance than SOT23 for this device?

Yes. The SOT25 package used in APX803L20-22W5-7 has a junction-to-ambient thermal resistance (θJA) of 200°C/W, identical to SOT23 but with improved mechanical robustness and larger copper area for enhanced heat spreading in high-reliability or thermally stressed PCB layouts.