Asahi Kasei Microdevices/AKM AP4405AENFE

Overview

AP4405AENFE from ABOV Semiconductor is a single-channel voltage detector with integrated P- and N-channel MOSFET power switches, operating from 1.2 V to 5.5 V supply, consuming only 10 nA quiescent current, featuring 2.3 V high-detection threshold and 2.2 V low-detection threshold with ±35 mV accuracy, used in battery-powered microcontroller reset supervision and power sequencing control.

For engineers reviewing the AP4405AENFE datasheet, AP4405AENFE pinout, AP4405AENFE application, or AP4405AENFE equivalent, key selection criteria include detection threshold hysteresis, ultra-low current consumption, dual-output drive capability (open-drain + push-pull), WQFN-16 thermal performance, and -40°C to +85°C industrial temperature operation.

Technical Context

The AP4405AENFE integrates independent voltage monitoring and dual-mode output drivers within a single die: one channel monitors supply voltage against fixed thresholds (2.3 V high / 2.2 V low), triggering either open-drain or push-pull outputs based on detection state. Its internal reference achieves ±35 mV accuracy across temperature and supply variation.

This device implements a dual-MOSFET switch architecture-comprising complementary P- and N-channel devices-enabling bidirectional load control and fast turn-on/turn-off response without external components. It requires no external timing capacitor and operates continuously over the full -40°C to +85°C range.

Key Specifications

Pinout & Package

AP4405AENFE is housed in a thermally enhanced HWQFN-16 package (3.0 × 3.0 mm, 0.5 mm pitch) with exposed thermal pad, supporting reflow soldering and efficient heat dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector with integrated MOSFET switch applications.

Compared with AP4405AENFE, AP4405AENMH offers higher trip point for cleaner 3.3 V rail monitoring, while AP4405AENJG provides centered thresholds ideal for dual-supply domains-both retain identical thermal, package, and drive capabilities.

Availability

AP4405AENFE is available at Aetrix Electronics and suitable for battery-powered MCU supervision, USB-C power path control, and industrial sensor node power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for AP4405AENFE 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

ABOV Semiconductor is a fabless Korean semiconductor company specializing in 8-bit and 32-bit MCUs, analog/mixed-signal ICs, and power management solutions for industrial, consumer, and automotive markets.

The AP4405 series targets compact, low-power system supervision with integrated switching-designed to replace discrete voltage detectors and external MOSFETs in space- and current-constrained applications.

FAQ

What is the detection accuracy specification for AP4405AENFE?

The AP4405AENFE has a detection accuracy of ±35 mV across its full operating temperature range (-40°C to +85°C) and supply voltage range (1.2 V to 5.5 V). This tolerance applies to both the 2.3 V high-detection threshold and the 2.2 V low-detection threshold, ensuring consistent reset behavior under varying environmental and electrical conditions. The AP4405AENFE achieves this accuracy using a trimmed bandgap reference and on-die comparator design.

Does AP4405AENFE support both push-pull and open-drain outputs simultaneously?

Yes, the AP4405AENFE provides two independent outputs: OUT (push-pull) and OD (open-drain), both driven by the same internal detection circuitry. The push-pull output can source/sink up to 20 mA, while the open-drain output requires an external pull-up but supports voltage-level translation. This dual-output capability allows the AP4405AENFE to interface directly with multiple MCU GPIO configurations without additional logic.

What is the recommended PCB layout practice for the thermal pad of AP4405AENFE?

The AP4405AENFE's exposed thermal pad (TPAD) must be soldered to a solid GND copper pour on the PCB using at least nine 0.3 mm diameter thermal vias spaced evenly beneath the pad. This configuration ensures optimal thermal dissipation and electrical stability. Failure to properly connect TPAD may result in elevated junction temperature, reduced long-term reliability, and potential shift in detection thresholds. The AP4405AENFE datasheet specifies minimum solder mask opening and stencil aperture dimensions for reliable reflow.

Can AP4405AENFE be used to monitor voltages below 1.2 V?

No, the AP4405AENFE is not specified for operation below 1.2 V supply voltage, and its internal reference and comparator circuitry require ≥1.2 V to function correctly. While the SENSE input accepts external voltage dividers, the device itself cannot monitor sub-1.2 V rails directly. For lower-voltage monitoring, consider using a dedicated low-V_DD supervisor or scaling the input via resistor divider-ensuring the divided voltage remains within the AP4405AENFE's valid detection range and does not violate input leakage or impedance limits.

Is AP4405AENFE pin-compatible with other variants in the AP4405 family?

Yes, all AP4405 variants-including AP4405AENFE, AP4405AENMH, AP4405AENJG, and AP4405AENTS-share identical HWQFN-16 (3.0 × 3.0 mm, 0.5 mm pitch) packaging and pinout. This allows drop-in replacement across threshold variants without PCB redesign. The AP4405AENFE maintains full mechanical, thermal, and electrical compatibility with other members of the AP4405 family, simplifying design reuse and inventory consolidation.