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NX2114A Datasheet(PDF) 1 Page - Microsemi Corporation |
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NX2114A Datasheet(HTML) 1 Page - Microsemi Corporation |
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1 / 20 page  NX2114/2114A 1 Rev. 4.0 06/20/06 TYPICAL APPLICATION DESCRIPTION n Synchronous Controller in 8 Pin Package n Bus voltage operation from 2V to 25V n Single 5V Supply Operation n Short protection with feedback UVLO n Internal 300kHz for 2114 and 600kHz for 2114A n Internal Digital Soft Start Function n Shut Down via pulling comp pin low n Pb-free and RoHS compliant ORDERING INFORMATION FEATURES 300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER APPLICATIONS 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 PRELIMINARY DATA SHEET Evaluation board available. Device Temperature Package Frequency Pb-Free NX2114CSTR 0 to 70oC SOIC-8L 300kHz Yes NX2114ACSTR 0 to 70o C SOIC-8L 600kHz Yes Figure1 - Typical application of 2114 Vcc 47pF C1 10.2k R1 R4 22.1k 1.5k 10.2k R2 2.2nF C3 0.1uF C7 Co 1.5nF C2 L1 1.5uH M2 M1 D1 MBR0530T1 +5V Vin Cin 1uF C5 1uF C6 BST Fb Comp SW Hdrv Ldrv Gnd 5 1 2 8 4 7 6 R3 3 2 x (220uF,15mohm) 220uF,12mohm Vout +1.6V,6A L2 1uH 47uF,70mohm C4 C8 R5 10 47uF,70mohm OFF ON 2N3904 10k R6 R7 10k The NX2114 controller IC is a synchronous Buck con- troller IC designed for step down DC to DC converter applications. Synchronous control operation replaces the traditional catch diode with an Nch MOSFET result- ing in improved converter efficiency. Although the NX2114 controller is optimized to convert single 5V bus voltages to supplies as low as 0.8V output voltage, however us- ing a few external components it can also be used for other input supplies such as 12V input (See NX2113 data sheet for more optimized solution). The NX2114 operates at 300kHz while 2114A is set at 600kHz operation which together with less than 50 nS of dead band provides an efficient and cost effective solution. Other features of the device are: Internal digital soft start; Vcc undervoltage lock out; Out- put undervoltage protection with digital filter and shut- down capability via the enable pin. Pb Free Product |
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Similar Description - NX2114A |
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