Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Channel Type | Independent | Digi-Key | |
| Current Peak Output Source Sink | - | Digi-Key | |
| Digikey Programmable | - | Digi-Key | |
| Driven Configuration | Full-Bridge | Digi-Key | |
| Gate Type | MOSFET (N-Channel) | Digi-Key | |
| Grade | Automotive | Digi-Key | |
| Input Type | Non-Inverting | Digi-Key | |
| Logic Voltage Vil Vih | - | Digi-Key | |
| Mounting Type | Surface Mount | Digi-Key | |
| Number Of Drivers | 2 | Digi-Key | |
| Operating Temperature Range | -40°C ~ 135°C (TA) | Digi-Key | |
| Package Case | 20-TSSOP (0.173”, 4.40mm Width) Exposed Pad | Digi-Key | |
| Qualification | AEC-Q100 | Digi-Key | |
| Rise Fall Time (Typ) | - | Digi-Key | |
| Supplier Device Package | 20-TSSOP-EP | Digi-Key | |
| Voltage Supply | 50V | Digi-Key |
When To Use
Use the A89505KLPTR in automotive applications requiring dual independent MOSFET gate drivers with a full-bridge configuration, where operation up to 50 V supply voltage and an operating temperature range of -40°C to 135°C is needed. Its non-inverting input type and automotive-grade qualification (AEC-Q100) make it ideal for motor control and power conversion in harsh environments.
Do not use this device in applications requiring logic-level input thresholds (VIL/VIH) or programmable gate drive current, as these specifications are not provided. For applications needing integrated programmable gate drive or specific logic voltage thresholds, consider alternative drivers with those features.
When Not To Use
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High-current (>10A) power stage for server VRM: The current rating and driver architecture limit output current handling to moderate levels. Use a high-current synchronous buck with external FETs designed for large gate charge and current demands instead.
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Battery-powered IoT sensor with μA standby current: The lack of quiescent current specification and fast switching rise/fall times imply substantial bias current unsuitable for ultra-low-power applications. Use a low-IQ PFM buck to maximize battery life.
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Isolated power supply for medical instrumentation: The device has no galvanic isolation features or isolated input logic. Use an isolated flyback controller to meet safety and isolation requirements.
Application Notes
The switching node connected to the MOSFET gates is the critical node that switches rapidly and requires the smallest possible loop area to reduce EMI and switching losses. The logic input pins are noise-sensitive and should be routed away from high-current switching traces. Due to the device’s integration and thermal characteristics, a properly designed PCB with the exposed pad soldered to a thermal plane is sufficient; no additional heatsink is generally needed for operation within the specified -40°C to 135°C temperature range at typical load conditions.
Gotchas
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If the engineer connects the device inputs with inverted logic signals, expecting inverting operation, the driver will not switch the MOSFET gates correctly, leading to improper bridge operation and potential device failure. To avoid this, ensure the input signals are non-inverting as specified.
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If the PCB layout results in a large switching node loop area, excessive EMI and switching losses may occur due to the high di/dt from the MOSFET gate drive. To fix this, minimize the loop area around the switching node and gate drive traces, especially at the MOSFET gate pins.