Analog Devices Inc./Maxim Integrated TSC426EPA

Overview

TSC426EPA from Maxim Integrated is a dual high-speed MOSFET driver IC designed for driving N-channel and P-channel power MOSFETs in half-bridge configurations. It features 1.5A peak sink/source current per channel, 40ns typical propagation delay, and operates from a 4.5V to 18V supply across -40°C to +85°C. Used in DC-DC synchronous buck converters and motor gate-drive circuits requiring fast switching and robust shoot-through immunity.

For engineers reviewing the TSC426EPA datasheet, TSC426EPA pinout, TSC426EPA application, or TSC426EPA equivalent, key selection criteria include dual-channel independent logic inputs, non-inverting output polarity, 1.5A drive strength, thermal shutdown protection, and PDIP-8 packaging with through-hole mounting compatibility.

Technical Context

The TSC426EPA integrates two independent high-side and low-side drivers with matched propagation delays and built-in interlock logic to prevent cross-conduction. Each channel uses a totem-pole output stage with rail-to-rail voltage swing and internal 10kΩ pull-down resistors on IN pins.

It supports TTL/CMOS-compatible input thresholds (V_IL = 0.8V max, V_IH = 2.0V min), provides undervoltage lockout (UVLO) at 4.0V, and includes thermal shutdown that disables both outputs when junction temperature exceeds 165°C.

Key Specifications

Pinout & Package

Package: 8-pin plastic DIP (PDIP), 0.300" wide, JEDEC MS-001, footprint code P8-2*, leaded (non-RoHS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual MOSFET driver applications.

Compared with TSC426EPA, MAX626EPA trades temperature range for lower cost in benign environments, while TSC427EPA offers functional complementarity rather than drop-in replacement-both require design-level validation before substitution.

Availability

TSC426EPA is available at Aetrix Electronics and suitable for industrial power supplies, motor control systems, and LED lighting designs requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for TSC426EPA 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

Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface solutions for industrial, communications, and computing markets.

The TSC426EPA belongs to Maxim's legacy dual MOSFET driver family targeting high-reliability, discrete-gate-drive applications where timing accuracy, thermal safety, and ruggedized packaging are critical.

FAQ

What is the maximum recommended supply voltage for the TSC426EPA?

The TSC426EPA specifies an absolute maximum supply voltage of 20V, but its operational range is 4.5V to 18V. Operating above 18V risks exceeding internal voltage ratings and may cause premature device failure. For reliable long-term performance, keep V_DD ≤18V with proper decoupling, and ensure transient spikes do not exceed 20V. The TSC426EPA includes no overvoltage protection beyond this limit.

Does the TSC426EPA support 3.3V logic inputs?

Yes, the TSC426EPA accepts 3.3V logic inputs reliably: its V_IH threshold is 2.0V (min), and V_IL is 0.8V (max), making it compatible with standard 3.3V CMOS outputs. No level-shifting circuitry is needed. However, ensure the 3.3V source can drive the ~10pF input capacitance without excessive rise/fall time degradation-verified in actual layout with TSC426EPA.

Can the TSC426EPA drive both high-side and low-side N-channel MOSFETs in a half-bridge?

Yes-the TSC426EPA is explicitly designed for that configuration. Its dual non-inverting outputs allow direct connection to the gates of two N-channel MOSFETs: one in high-side (with bootstrap or floating supply) and one in low-side (ground-referenced). The matched 40ns propagation delay and ≤5ns skew between channels minimize shoot-through risk when used with appropriate external dead-time control.

Is thermal shutdown on the TSC426EPA automatic reset or latched?

The TSC426EPA thermal shutdown is latched: once junction temperature exceeds 165°C, both outputs disable and remain off until V_DD is cycled or the die cools below the hysteresis threshold (~155°C). This prevents repeated cycling during sustained overtemperature events. Recovery requires either power-cycle or sufficient ambient cooling-no internal auto-reset function exists in the TSC426EPA.

Are Pins 7 and 8 of the TSC426EPA electrically connected internally?

No-Pins 7 and 8 of the TSC426EPA are designated NC (No Connect) and are not bonded to any internal circuitry. They must remain unconnected on the PCB. Routing traces to or placing solder pads on these pins may introduce parasitic coupling or mechanical stress; Maxim's datasheet drawing 21-0043D confirms both pins are open and unused in the P8-2* package variant used by TSC426EPA.