ISL6609, ISL6609A Synchronous Rectified MOSFET Driver is a high frequency, MOSFET driver optimized to drive two N-Channel power MOSFETs in a synchronous-rectified buck converter topology. This driver combined with an Intersil ISL63xx or ISL65xx multiphase PWM controller forms a complete single-stage core-voltage regulator solution with high efficiency performance at high switching frequency for advanced microprocessors. The IC is biased by a single low voltage supply (5V), minimizing driver switching losses in high MOSFET gate capacitance and high switching frequency applications. Each driver is capable of driving a 3nF load with less than 10ns rise/fall time. Bootstrapping of the upper gate driver is implemented via an internal low forward drop diode, reducing implementation cost, complexity, and allowing the use of higher performance, cost effective N-Channel MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously. The ISL6609, ISL6609A features 4A typical sink current for the lower gate driver, enhancing the lower MOSFET gate hold-down capability during PHASE node rising edge, preventing power loss caused by the self turn-on of the lower MOSFET due to the high dV/dt of the switching node. The ISL6609, ISL6609A also features an input that recognizes a high-impedance state, working together with Intersil multiphase PWM controllers to prevent negative transients on the controlled output.
The ISL6609 and ISL6609A are high‑frequency MOSFET drivers optimized for driving two N‑Channel power MOSFETs in a synchronous‑rectified buck converter. They include adaptive shoot‑through protection, a low‑bias 5 V supply, and a 4 A typical sink current for the lower gate driver.
The document details electrical specifications, absolute maximum ratings, pin descriptions, layout recommendations, and typical application circuits. It also includes ordering information, package dimensions, and design guidelines for bootstrap capacitors and thermal management.
| Input Voltage (Ven) range | -0.3 V to VCC + 0.3 V |
|---|---|
| BOOT Voltage range | -0.3 V to 25 V (DC) or 36 V (<200 ns) |
| Ambient Temperature Range (absolute max) | -40 °C to 125 °C |
| Bias Supply Current | 132 pA |
| UGATE Rise Time (3 nF load) | 8.0 ns |
| LGATE Rise Time (3 nF load) | 8.0 ns |
| LGATE Fall Time (3 nF load) | 4.0 ns |
| EN LOW Threshold | 1.0 V |
| EN HIGH Threshold | 1.6 V |
The lower gate driver provides a typical sink current of 4 A.
The recommended operating ambient temperature range is –40 °C to 100 °C.
EN LOW threshold is 1.0 V and EN HIGH threshold is 1.6 V.