Diodes Incorporated PT8A2766ITAEX

Overview

PT8A2766ITAEX from Pericom Semiconductor is a mixed-signal CMOS DC motor controller IC designed for battery-powered personal care devices. It integrates a 150mΩ high-side MOSFET, thermal/short-circuit protection, battery under-voltage detection (VT1 = 2.2V typ), over-discharge cutoff (VT2 = 1.9V typ), and dual LED status indicators - all in a lead-free 5-pin SOT23 package. It drives up to 1A motor loads directly and supports lock/unlock via long-press (>3s) on the ON/OFF pin.

For engineers reviewing the PT8A2766ITAEX datasheet, PT8A2766ITAEX pinout, PT8A2766ITAEX application, or PT8A2766ITAEX equivalent, key selection criteria include its 1.6–5.5V operating range, 20µA standby current, integrated OCP threshold (VT3 = 2.25V), ON/OFF programmable discharge voltage, and SOT23-5 footprint compatibility with space-constrained shaver and toothbrush PCBs.

Technical Context

The PT8A2766ITAEX implements a fully self-contained motor power switch with embedded analog comparators for battery monitoring and over-current sensing. Its ENB pin enables hardware reset and unlocks auto-lock after three consecutive under-voltage shutdowns, while the ON/OFF pin serves dual roles: momentary control (50–90ms debounce) and adjustable discharge threshold via external resistor divider.

It features a dedicated OCP input (pin 3 in SOT23-5 variant) that triggers high-impedance shutdown when voltage at that node exceeds 2.25V, corresponding to ~1A load current through an external sense resistor. Thermal protection activates at 130°C junction temperature, forcing OUT into high-Z without resetting internal state.

Key Specifications

Pinout & Package

PT8A2766ITAEX uses the SOT23-5 package (JEDEC MO-178C/AA), measuring 2.92mm × 1.60mm × 1.10mm with 0.95mm lead pitch. Pin 1 is marked by a dot; pin numbering follows standard SOT23 orientation (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DC motor control applications.

Compared with TB67H401FTG and BD65496MUV, PT8A2766ITAEX delivers a purpose-built, minimal-BOM solution for ultra-low-power, single-button, battery-protected motor switching - trading programmability for integration density and sub-20µA quiescent current.

Availability

PT8A2766ITAEX is available at Aetrix Electronics and suitable for electric shavers, rechargeable toothbrushes, and portable hair trimmers requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for PT8A2766ITAEX 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-performance interface, timing, and power management ICs for consumer and computing markets before its 2017 acquisition.

The PT8A2766x series was developed specifically for cost-sensitive, space-constrained battery-powered personal care appliances - emphasizing integration of motor drive, protection, and user interface functions in minimal footprint packages.

FAQ

What is the maximum continuous motor current supported by PT8A2766ITAEX?

The IC supports 1A continuous output current per electrical characteristics table (IOUT = –1.0A at VOUT = 0.15V, VCC = 2.4V). This assumes adequate PCB copper area for thermal dissipation; junction-to-ambient thermal resistance is 86°C/W in SOT23-5, limiting sustained 1A operation to ambient ≤60°C without heatsinking.

How does the ON/OFF pin adjust battery over-discharge voltage (VT2)?

VT2 is set by an internal comparator referencing an internal 2.0V bandgap. An external resistor divider from VCC to GND, with the tap connected to ON/OFF, scales the battery voltage applied to the pin. For example, a 200kΩ–100kΩ divider yields VT2 ≈ 1.9V at battery terminals - matching the typical spec value.

Can PT8A2766ITAEX drive a motor requiring reverse polarity?

No. PT8A2766ITAEX contains only a high-side switch and cannot reverse motor direction. It is designed exclusively for unidirectional brushed DC motor control. Bidirectional operation requires an external H-bridge or a different IC such as the TB67H401FTG.

Is there a recommended bypass capacitor value for VCC?

A 0.1µF ceramic capacitor placed within 2mm of the VCC and GND pins is specified in the application circuit and functional description. This value ensures stable operation during motor turn-on transients and suppresses noise coupling into the internal POR and protection comparators.