Single-Phase Synchronous MOSFET Driver with Ultra-Low-Power Mode

The MAX15492 is a synchronous half-bridge driver with ultra-low-power mode. The device is intended to work with controller ICs such as the MAX15411, MAX15566/MAX15567, or MAX15576/MAX15577 in multiphase CPU core regulators. To provide the best light-load efficiency, the controller can place the device into an ultra-low power mode where the supply current is only 4µA.

The low-side driver is optimized to drive 3nF capacitive loads with 3ns/7ns typical fall/rise times, and the high-side driver with 7ns/14ns typical fall/rise times. Adaptive dead-time control prevents shoot-through currents and maximizes converter efficiency.

The MAX15492 is available in a small, 8-pin (2mm × 2mm) TDFN package with an exposed pad.

Applications

* Intel® Ultrabook™/Notebook Computers * Multiphase DC-DC Converters * Tablet Computers

* Extends Battery Life

* Ultra-Low-Power Mode with 4µA Supply Current

* 2V to 24V Input Voltage Range

* Selectable Pulse-Skipping Mode

* 7ns Minimum Guaranteed Dead-Time

* Allows Operation Up to 3MHz per Phase

* 0.7Ω Low-Side On-Resistance

* 1.5Ω High-Side On-Resistance

* 12ns Propagation Delay

* 4.2V to 5.5V Bias Supply Range (MAX15492)

* 3V to 5.5V Bias Supply Range (MAX15492B)

* Integrated Boost Switch Saves Space and Cost