Microsemi NX9548
The NX9548 is a synchronous buck switching regulator with 21 mΩ internal N-channel MOSFETs, primarily intended for portable (mobile) applications. The NX9548 operates from 4.5 V to 24 V, and the output voltage range is from 0.75 V to 5 V, with output currents as high as 8 A. It can be selected to operate in synchronous mode, or non-synchronous (diode emulation or PSM) mode at light loads, to improve efficiency.| Part No. | NX9548 |
|---|---|
| Datasheet | NX9548 Download |
| Manufacturer |  Microsemi |
| Description | Time Synchronous Buck Regulator |
| Buy | Stock & Price |
DESCRIPTION
Adaptive constant on time (COT) control provides extremely fast transient response to line and load steps, while at the same time providing near-constant switching frequency over a wide input voltage range. The frequency is also externally adjustable. The NX9548 features overcurrent protection (OCP), feedback under-voltage lockout (FB UVLO), and overvoltage protection (OVP). It also includes an integrated bootstrap Schottky diode, and provides lowvoltage (5 V) gate-drive capability. In addition it provides a Power Good indicator and has adaptive dead time.FEATURES
● Adaptive COT Control● Adjustable, Constant Switching Frequency up to 1 MHz
● Extremely Low-RDSON N-MOSFETs
● Bus Voltage 4.5 V to 24 V
● Selectable Diode Emulation Mode (PSM Mode)
● Current Limit, UVLO, OVP
● Gate Resistor Provision for EMI Reduction
● -40°C to +85°C Ambient Temperature
● -40°C to +150°C Junction Temperature
● RoHS Compliant
● 5×5 mm Very Thin Profile QFN (VQFN) Package
APPLICATIONS
● Ultramobile/Notebook PCs● Tablets/Slates
● Hand-held Portable Instruments
● ADSL Modem July 2015 Rev.
