Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Channel Type | Synchronous | Digi-Key | |
| Current Peak Output Source Sink | - | Digi-Key | |
| Digikey Programmable | Not Verified | Digi-Key | |
| Driven Configuration | Full-Bridge | Digi-Key | |
| Gate Type | MOSFET (N-Channel) | Digi-Key | |
| Input Type | Non-Inverting | Digi-Key | |
| Logic Voltage Vil Vih | 0.8V, 2V | Digi-Key | |
| Mounting Type | Surface Mount | Digi-Key | |
| Number Of Drivers | 4 | Digi-Key | |
| Operating Temperature Range | -40°C ~ 135°C (TA) | Digi-Key | |
| Package Case | 20-WFQFN Exposed Pad | Digi-Key | |
| Rise Fall Time (Typ) | - | Digi-Key | |
| Supplier Device Package | 20-QFN-EP (4x4) | Digi-Key | |
| Voltage Supply | - | Digi-Key |
When To Use
Use the A89506KESSR-J in applications requiring a full-bridge MOSFET driver with four integrated drivers and non-inverting inputs, such as synchronous motor control or DC-DC converters operating within the -40°C to 135°C ambient temperature range. The device is ideal when a compact surface-mount solution (20-WFQFN Exposed Pad) is needed with logic input thresholds compatible with standard 3.3 V or 5 V logic (VIL = 0.8 V, VIH = 2 V).
Avoid using this device in applications requiring analog or programmable drive current control, as it does not support programmable peak output sourcing or sinking. For such cases, consider a driver with verified programmable current capabilities.
When Not To Use
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Sub-1V output voltage regulation: The minimum logic voltage threshold of 2V and lack of low-dropout capability disqualify this driver for tight dropout or low-voltage linear regulation. Use an LDO regulator instead.
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Output currents above 20A continuous: The integrated MOSFET driver current sourcing and sinking capability is limited by package thermal and current ratings. For currents exceeding this, a high-current synchronous buck with external FETs is required.
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Battery-powered sensor node needing μA standby current: Without verified low quiescent current specs, this driver is unsuitable for ultra-low power designs where sleep-mode current dominates. Use a low-IQ PFM buck instead.
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 minimize parasitic inductance and switching noise. The logic input pins are noise-sensitive and should be routed away from noisy switching nodes and power traces. Although the device package (20-WFQFN Exposed Pad) offers good thermal conduction, a proper thermal land and PCB copper area should be provided to maintain junction temperature within the -40°C to 135°C operating range; a heatsink is typically not required under normal operating conditions.
Gotchas
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Connecting the device inputs to signals with voltage levels below 0.8 V or above 2 V without proper level shifting can cause unreliable switching or incomplete gate drive. To avoid this, ensure input logic signals meet the specified VIL and VIH thresholds.
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Using the A89506KESSR-J without adequate PCB layout attention to the gate drive loop can result in increased switching noise and EMI. Minimize the loop area of the switching node and gate drive traces to prevent oscillations and voltage spikes.