1 Features
1• 90% System Efficiency at 15 A
• Max Rated Continuous Current 20 A, Peak 45 A
• High Frequency Operation (up to 2 MHz)
• High Density – SON 3.5 × 4.5 mm Footprint
• Ultra-Low Inductance Package
• System Optimized PCB Footprint
• Ultra-Low Quiescent (ULQ) Current Mode
• 3.3 V and 5 V PWM Signal Compatible
• Diode Emulation Mode with FCCM
• Input Voltages up to 24 V
• Tri-State PWM Input
• Integrated Bootsrap Diode
• Shoot Through Protection
• RoHS Compliant – Lead Free Terminal Plating
• Halogen Free

2 Applications
• Ultrabook/Notebook DC/DC Converters
• Multiphase Vcore and DDR Solutions
• Point-of-Load Synchronous Buck in Networking,
Telecom, and Computing Systems

3 Description
The CSD97394Q4M NexFET™ Power Stage is a
highly-optimized design for use in a high-power, high-
density synchronous buck converter. This product
integrates the driver IC and NexFET technology to
complete the power stage switching function. The driver IC has a built-in selectable diode emulation
function that enables DCM operation to improve light
load efficiency. In addition, the driver IC supports
ULQ mode that enables connected standby for Windows® 8. With the PWM input in tri-state,
quiescent current is reduced to 130 μA, with
immediate response. When SKIP# is held at tri-state,
the current is reduced to 8 μA (typically 20 μs is
required to resume switching). This combination
produces a high current, high efficiency, and high
speed switching device in a small 3.5 × 4.5 mm
outline package. In addition, the PCB footprint is
optimized to help reduce design time and simplify the
completion of the overall system design.