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NX2124ACSTR Datasheet(PDF) 1 Page - Microsemi Corporation |
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NX2124ACSTR Datasheet(HTML) 1 Page - Microsemi Corporation |
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1 / 17 page  NX2124/2124A 1 Rev.1.8 02/28/08 TYPICAL APPLICATION DESCRIPTION n Bus voltage operation from 2V to 25V n Fixed 300kHz voltage mode controller n Internal Digital Soft Start Function n Prebias Startup n Less than 50 nS adaptive deadband n Current limit triggers hiccup by sensing Rdson of Synchronous MOSFET n No negative spike at Vout during startup and shutdown n Pb-free and RoHS compliant ORDERING INFORMATION FEATURES 300kHz SYNCHRONOUS PWM CONTROLLER APPLICATIONS PRELIMINARY DATA SHEET Evaluation board available. Device Temperature Package Frequency OCP Threshold Pb-Free NX2124CSTR 0 to 70oC SOIC-8L 300kHz 360mV Yes NX2124ACSTR 0 to 70o C SOIC-8L 300kHz 540mV Yes Figure1 - Typical application of 2124 The NX2124/2124A controller IC is a synchronous Buck controller IC designed for step down DC to DC con- verter applications. It is optimized to convert bus volt- ages from 2V to 25V to outputs as low as 0.8V voltage. The NX2124/2124A operates at fixed 300kHz, employs fixed loss-less current limiting by sensing the Rdson of synchronous MOSFET followed by hiccup feature. NX2124A has higher current limit threshold than NX2124. Feedback under voltage also triggers hiccup. Other features of the device are: 5V gate drive, Adaptive deadband control, Internal digital soft start, Vcc undervoltage lock out and shutdown capability via the comp pin. Pb Free Product n Graphic Card on board converters n Memory Vddq Supply in mother board applications n On board DC to DC such as 5V to 3.3V, 2.5V or 1.8V n Hard Disk Drive n Set Top Box 8k R3 10k R2 7 M3 C4 100uF L2 1uH +1.8V 9A Vout 3 6 4 8 2 1 5 Gnd Ldrv Hdrv SW FB BST Vcc C3 1uF C5 1uF Cin 280uF 18mohm Vin +5V D1 M1 M2 L1 1.5uH Co 2 x (1500uF,13mohm) C6 0.1uF COMP 4k R1 C1 4.7nF 37.4k R4 C2 2.2nF HI=SD C7 27pF R5 10 MBR0530T1 |
Similar Part No. - NX2124ACSTR |
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Similar Description - NX2124ACSTR |
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