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The LM27222 is a dual N-channel MOSFET driver designed to drive MOSFETs in push-pull configurations as typically used in synchronous buck regulators. The LM27222 takes the PWM output from a controller and provides the proper timing and drive levels to the power stage MOSFETs. Adaptive shoot-through protection prevents damaging and efficiency reducing shoot-through currents, thus ensuring a robust design capable of being used with nearly any MOSFET. The adaptive shoot-through protection circuitry also reduces the dead time down to as low as 10ns, ensuring the highest operating efficiency. The peak sourcing and sinking current for each driver of the LM27222 is about 3A and 4.5Amps respectively with a Vgs of 5V. System performance is also enhanced by keeping propagation delays down to 8ns. Efficiency is once again improved at all load currents by supporting synchronous, non-synchronous, and diode emulation modes through the LEN pin. The minimum output pulse width realized at the output of the MOSFETs is as low as 30ns. This enables high operating frequencies at very high conversion ratios in buck regulator designs. To support low power states in notebook systems, the LM27222 draws only 5µA from the 5V rail when the IN and LEN inputs are low or floating.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | LM27222 High-Speed 4.5A Synchronous MOSFET Driver datasheet (Rev. B) | 7/03/2013 | ||
| Nota sobre la aplicación | Using Half-Bridge Gate Driver to Achieve 100% Duty Cycle for High Side FET | PDF | HTML | 25/03/2024 | ||
| Nota sobre la aplicación | Bootstrap Circuitry Selection for Half Bridge Configurations (Rev. A) | PDF | HTML | 8/09/2023 | ||
| Nota sobre la aplicación | Comparative Analysis of Two Different Methods for Gate-Drive Current Boosting (Rev. A) | PDF | HTML | 17/02/2022 | ||
| Application brief | External Gate Resistor Selection Guide (Rev. A) | 28/02/2020 | |||
| Application brief | Understanding Peak IOH and IOL Currents (Rev. A) | 28/02/2020 | |||
| Más documentación | Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) | 29/10/2018 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| WSON (NGT) | 8 | Ultra Librarian |
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