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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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NX2154CSTR датащи(PDF) 1 Page - Microsemi Corporation |
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NX2154CSTR датащи(HTML) 1 Page - Microsemi Corporation |
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1 / 17 page  NX2154/2154A 1 Rev.1.2 02/26/07 TYPICAL APPLICATION DESCRIPTION n Bus voltage operation from 2V to 40V 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 NX2154CSTR 0 to 70oC SOIC-8L 300kHz 360mV Yes NX2154ACSTR 0 to 70o C SOIC-8L 300kHz 540mV Yes Figure1 - Typical application of 2154 The NX2154/2154A 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 40V to outputs as low as 0.8V voltage. The NX2154/2154A operates at fixed 300kHz. The NX2154/2154A employs fixed loss-less current limiting by sensing the Rdson of synchronous MOSFET followed by hiccup feature.NX2154A has higher current limit threshold than NX2154. 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 +5V,3A Vout 50ME180WX 6ME1000WG(1000uF,30mohm) 3 6 7 4 8 2 1 5 Gnd Ldrv Hdrv SW Comp Fb BST Vcc 1uF 1uF Vin +33V MBR0530T1 M1A STM6920 M1B 15uH 12nF 0.1uF 191 13.3k 1k Vin +5V 82pF M3 HI=SD |
Аналогичный номер детали - NX2154CSTR |
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Аналогичное описание - NX2154CSTR |
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