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NX2116 Datasheet(PDF) 1 Page - Microsemi Corporation |
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NX2116 Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 14 page NX2116/2116A/2116B/2117/2117A 1 Rev. 3.0 03/14/06 TYPICAL APPLICATION DESCRIPTION The NX2116/2117 family of products are synchronous Buck controller IC designed for step down DC to DC converter applications. They are optimized to convert bus voltages from 2V to 25V to as low as 0.8V output voltage. The NX2116 and 2117 offer an Enable pin that can be used to program the converter's start up voltage using an external divider from bus voltage. These prod- ucts operate at fixed internal frequency of 300kHz, ex- cept that NX2116A operates at 600kHz and 2116B at 1MHz frequency. These products employ loss-less cur- rent limiting protection by sensing the Rdson of syn- chronous MOSFET followed by latch out feature. Feed- back under voltage triggers Hiccup. Other features are; 5V gate drive, Power good indica- tor, Adaptive deadband control, Internal digital soft start; Vcc undervoltage lock out and shutdown capability via the enable pin or comp pin. n Bus voltage operation from 2V to 25V n Power Good indicator available in NX2116 n Fixed 300kHz, 600kHz and 1MHz for NX2116 and 300kHz, 600kHz for NX2117 family. n Internal Digital Soft Start Function n Less than 50 nS adaptive deadband n Enable pin to program BUS UVLO for NX2116/2117 n Programmable current limit triggers latch out by sensing Rdson of Synchronous MOSFET n No negative spike at Vout during startup and shutdown ORDERING INFORMATION FEATURES SYNCHRONOUS PWM CONTROLLER WITH CURRENT LIMIT, POWER GOOD & OVER VOLTAGE APPLICATIONS n Graphic Card on board converters n Memory Vddq Supply n On board DC to DC such as 2V to 3.3V, 2.5V or 1.8V n ADSL Modem PRELIMINARY DATA SHEET Device Temperature Package Frequency Pb-Free NX2116CMTR 0 to 70oC MLPD-10L 300kHz Yes NX2116ACMTR 0 to 70o C MLPD-10L 600kHz Yes NX2116BCMTR 0 to 70o C MLPD-10L 1MHz Yes NX2117CUTR 0 to 70o C MSOP-10L 300kHz Yes NX2117ACUTR 0 to 70o C MSOP-10L 600kHz Yes Figure 1 - Typical application of 2116 C5 1uF Cin Vin1 +12V D1 M1 M2 L1 1uH C2 1.5nF C7 0.1uF R2 16k 17.4k R4 20k R1 33pF C1 68k R5 12.4k R6 Vcc BST Fb Comp SW Hdrv Ldrv 4 2 1 10 3 7 8 EN 6 C4 1uF 10 R3 +1.8V,9A Vout 270uF,18mohm 2x (220uF,12mohm) Co Gnd 11 L2 1uH C3 39uF OFF ON 2N3904 10k R8 R7 10k C8 1nF 2.61k R9 Pgood 1k R10 +5V 5 OCP 9 3.7k R11 Vin2 +5V MBR0530T1 Pb Free Product |
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