NX2307 Datasheet PDF

Microsemi NX2307

The NX2307 controller IC is a compact synchronous Buck controller IC with 8 lead SOIC8 package designed for step down DC to DC converter applications. The NX2307 n n n 12V Gate Driver Bus voltage operation from 7V to 15V Fixed hiccup current limit by sensing Rdson of controller is optimized to convert single supply 12V bus voltage to as low as 0.8V output voltage. The NX2307 employs fixed current limiting n Shut Down via pulling COMP pin followed by HICCUP feature.

Part No.	NX2307
Datasheet	NX2307 Download
Manufacturer	Microsemi
Description	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER
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DESCRIPTION

FEATURES

Internal UVLO n Synchronous MOSFET Internal 300kHz keeps the regulator off until the supply voltage exceeds n Internal Digital Soft Start Function 7V where internal digital soft starts get initiated to ramp n Adaptive deadband Control up output. Other features includes: n Pb-free and RoHS compliant 12V gate drive capability , Converter Shutdown by pulling COMP pin to Gnd, Adaptive dead band control.

APPLICATIONS

n Graphic Card on board converters n Vddq Supply in mother board applications n On board DC to DC such as 12V to 3.3V, 2.5V or 1.8V n Set Top Box and LCD Display TYPICAL APPLICATION Vin +12V M3 HI=SD C7 200pF L2 1uH C4 100uF R6 10 C3 1uF 5 Vcc R4 5.36k 7 COMP D1 MBR0530T1 1 BST Hdrv 2 SW 8 C6 0.1uF NX2307 C2 6.8nF 6 FB Ldrv 4 Gnd 3 C5 1uF M1 IRFR3706 L1 1.5uH R1 M2 1.43k IRFR3706 C1 2.7nF Cin 16SVP180M 16V,180uF Vout +1.8V 10A Co 4SEPC560M 560uF,7mohm R2 10k R3 8k Device NX2307CSTR Figure1 - Typical application of NX2307 ORDERING INFORMATION Temperature 0 to 70oC Package SOIC - 8L Frequency 300kHz Pb-Free Yes Rev.