Diodes Incorporated APX803L05-48SA-7

Overview

APX803L05-48SA-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 features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered and embedded digital systems.

For engineers reviewing the APX803L05-48SA-7 datasheet, APX803L05-48SA-7 pinout, APX803L05-48SA-7 application, or APX803L05-48SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, low-quiescent-current impact on system power budget, and SOT23 package compatibility with high-density PCB layouts.

Technical Context

The APX803L05-48SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×V_TH) to prevent oscillation during V_CC recovery. Its comparator continuously monitors V_CC against a fixed 5.0V threshold and asserts the open-drain RESET pin low when V_CC drops below V_TH – 100mV within 20µs.

Reset assertion remains active until V_CC exceeds the release threshold (V_{TH_H} = V_TH + V_HYS), after which the 55ms timeout period begins before RESET deassertion. No external components are required for basic operation, and the device supports sink currents up to 20mA at V_DS ≤ 0.4V.

Key Specifications

Pinout & Package

SOT23-3 package: ultra-small outline transistor with gull-wing leads, 1.3mm × 2.9mm body, 0.95mm height, JEDEC MO-178 compliant, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G50DBVR and MAX809SEUR+T, the APX803L05-48SA-7 delivers tighter threshold accuracy and lower quiescent current in a drop-in SOT23-3 package, making it optimal for new designs demanding precision 5.0V supervision with minimal power overhead.

Availability

APX803L05-48SA-7 is available at Aetrix Electronics and suitable for smartphone power sequencing, industrial PLC I/O modules, medical wearable sensor hubs, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for APX803L05-48SA-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 manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 standards.

The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for low-power, high-accuracy power-rail monitoring in portable and embedded systems where reliability and energy efficiency are critical.

FAQ

What is the exact reset threshold voltage for APX803L05-48SA-7?

The APX803L05-48SA-7 has a factory-trimmed fixed threshold of 5.0V with guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C). This corresponds to a minimum detectable voltage of 4.925V and maximum of 5.075V at +25°C, with temperature coefficient of 50ppm/°C.

Can APX803L05-48SA-7 drive a 10kΩ pull-up resistor to 3.3V?

Yes - the open-drain RESET output can sink ≥3.5mA at VOL ≤ 0.4V, supporting standard 3.3V or 5V pull-ups. With a 10kΩ resistor to 3.3V, the resulting load is 0.33mA, well within the device's 20mA absolute maximum sink capability and ensuring clean logic-low assertion.

Is there a version with adjustable reset delay?

No - the APX803L05-48SA-7 has a fixed 55ms reset timeout. Diodes offers other variants in the APX803L family with 0ms, 220ms, and 450ms delays (e.g., APX803L20-XXSA-7), but no externally adjustable delay option exists in this series; timing is set at wafer-level trimming.

Does APX803L05-48SA-7 require an input bypass capacitor?

A 100nF ceramic capacitor between V_CC and GND is recommended per the typical application circuit in DS38171 Rev. 3–2. It stabilizes the internal reference and improves noise immunity during transient events, though the device will function without it in low-noise environments.