Allegro MicroSystems A89500GEJTR-T

Overview

A89500GEJTR-T from Allegro MicroSystems is a 100 V half-bridge N-channel MOSFET driver in a 10-lead DFN package with wettable flank and exposed thermal pad, supporting 8–15 V gate drive supply, up to 100 V bridge voltage, and logic-level 3.3 V/5 V inputs - designed for driving high-power inductive loads such as brushed DC motors and solenoids in 12 V, 24 V, and 48 V automotive and industrial power networks.

For engineers reviewing the A89500GEJTR-T datasheet, A89500GEJTR-T pinout, A89500GEJTR-T application, or A89500GEJTR-T equivalent, key selection criteria include bootstrap-capable high-side drive, cross-conduction protection, independent HS/LS logic control, sleep mode via RESETn, and thermal performance in compact DFN packages for motor control PCBs.

Technical Context

The A89500GEJTR-T implements a bootstrap-based high-side gate driver architecture with VC–VS referenced output (GH) and GND-referenced low-side output (GL), enabling operation with bridge supplies up to 100 V while powered by a single 8–15 V VCC rail. Its internal lockout logic enforces non-overlapping HS/LS drive states to prevent shoot-through.

Each gate output delivers ±2.7 A peak source/sink current with <231 ns turn-on and <133 ns turn-off times into 33 nF load, and features active + passive pull-down circuits (R_GLPA/R_GHPA ≈ 10 kΩ; R_GLPD/R_GHPD ≈ 950 kΩ) ensuring safe MOSFET turn-off during power loss or sleep mode.

Key Specifications

Pinout & Package

The A89500GEJTR-T is housed in a 3 mm × 3 mm, 0.8 mm max height 10-lead DFN package (suffix EJ) with wettable flank and exposed thermal pad (PAD), lead-free with 100% matte-tin plating. Thermal resistance R_θJA = 28 °C/W on 4-layer JEDEC PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge MOSFET driver applications.

Compared with MP6542GQ-Z and DRV8305DCA, the A89500GEJTR-T uniquely supports 100 V bridge operation with hardware lockout and dedicated sleep mode - making it optimal for high-voltage brushed motor and solenoid control where simplicity, voltage headroom, and ultra-low standby power are critical.

Availability

A89500GEJTR-T is available at Aetrix Electronics and suitable for brushed DC motor control, solenoid actuation, and industrial linear actuator applications requiring stable component supply, automotive-grade reliability, and thermal-efficient DFN packaging.

Supply support for A89500GEJTR-T 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

Allegro MicroSystems is a U.S.-based designer and manufacturer of high-performance magnetic sensors and power ICs, specializing in motion control, power conversion, and precision sensing for automotive and industrial markets.

The A89500 product line delivers robust, high-voltage half-bridge gate drivers optimized for brushed motor, solenoid, and actuator control in demanding 12–48 V power networks - emphasizing reliability, thermal efficiency, and ease of integration.

FAQ

What is the maximum bridge supply voltage supported by the A89500GEJTR-T?

The A89500GEJTR-T supports a maximum bridge supply voltage of 100 V, enabling its use with 12 V, 24 V, and 48 V power networks while maintaining safe high-side gate drive operation. This rating is defined by the VC terminal's absolute maximum of VCC + 100 V and the VS terminal's VC – 16 V limit, verified in the Absolute Maximum Ratings table of the A89500 datasheet Rev. 2.

Does the A89500GEJTR-T require an external bootstrap capacitor, and what is its role?

Yes, the A89500GEJTR-T requires an external bootstrap capacitor connected between terminals C and S. It provides the elevated voltage needed to drive the high-side N-channel MOSFET gate above the bridge supply potential. During low-side conduction, the capacitor recharges through the internal bootstrap diode; proper sizing (typically ≥20× Q_GATE) ensures stable high-side operation across duty cycles and PWM frequencies.

How does the A89500GEJTR-T prevent cross-conduction between high-side and low-side MOSFETs?

The A89500GEJTR-T prevents cross-conduction using internal hardware lockout logic that forces both GH and GL outputs low whenever HS and LS inputs are simultaneously high. This behavior is explicitly defined in Table 1 (Control Logic) and confirmed in the Functional Description section - eliminating reliance on external dead-time generation and ensuring shoot-through immunity regardless of input timing.

What is the purpose of the RESETn pin on the A89500GEJTR-T, and what happens when it is asserted?

The RESETn pin on the A89500GEJTR-T is an active-low input that places the device into a low-power sleep mode. When pulled low, A89500GEJTR-T reduces quiescent current to 20 µA, disables all gate drive outputs, and holds GH/GL in a safe off-state via active and passive pull-down circuits - preserving system energy in battery-powered or standby-critical applications like automotive body controllers.

Is the A89500GEJTR-T AEC-Q100 qualified, and which grade does it meet?

The A89500GEJTR-T is the Grade G version, rated for ambient temperature range –40 °C to 105 °C and compliant with AEC-Q100 stress testing requirements for automotive applications. While the K version (A89500KEJSR) extends to 150 °C, the G version remains fully AEC-Q100 qualified per the Selection Guide and Features list in the A89500-DS Rev. 2 document.