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NX2114 Dataheets PDF



Part Number NX2114
Manufacturers Microsemi
Logo Microsemi
Description 300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER
Datasheet NX2114 DatasheetNX2114 Datasheet (PDF)

Evaluation board available. NX2114/2114A 300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER PRELIMINARY DATA SHEET Pb Free Product DESCRIPTION FEATURES The NX2114 controller IC is a synchronous Buck con- n Synchronous Controller in 8 Pin Package troller IC designed for step down DC to DC converter n Bus voltage operation from 2V to 25V applications. Synchronous control operation replaces n Single 5V Supply Operation the traditional catch diode with an Nch MOSFET result- n Short protection with fee.

  NX2114   NX2114


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Evaluation board available. NX2114/2114A 300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER PRELIMINARY DATA SHEET Pb Free Product DESCRIPTION FEATURES The NX2114 controller IC is a synchronous Buck con- n Synchronous Controller in 8 Pin Package troller IC designed for step down DC to DC converter n Bus voltage operation from 2V to 25V applications. Synchronous control operation replaces n Single 5V Supply Operation the traditional catch diode with an Nch MOSFET result- n Short protection with feedback UVLO ing in improved converter efficiency.Although the NX2114 n Internal 300kHz for 2114 and 600kHz for 2114A controller is optimized to convert single 5V bus voltages n Internal Digital Soft Start Function to supplies as low as 0.8V output voltage, however us- n Shut Down via pulling comp pin low ing a few external components it can also be used for n Pb-free and RoHS compliant 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 n operation which together with less than 50 nS of dead n band provides an efficient and cost effective solution. n Other features of the device are: Internal digital soft start; Vcc undervoltage lock out; Out- n put undervoltage protection with digital filter and shut- n down capability via the enable pin. APPLICATIONS Graphic Card on board converters Memory Vddq Supply in mother board applications On board DC to DC such as 5V to 3.3V, 2.5V or 1.8V Hard Disk Drive Set Top Box TYPICAL APPLICATION L2 1uH Vin +5V C4 47uF,70mohm R5 10 D1 MBR0530T1 OFF R6 10k ON R7 10k C8 47uF,70mohm 2N3904 C1 47pF C6 1uF 5 Vcc 7 Comp C2 1.5nF R4 22.1k 6 Fb NX2114 1 BST Hdrv 2 SW 8 Ldrv 4 C7 0.1uF Gnd 3 C5 1uF M1 L1 1.5uH M2 Cin 220uF,12mohm Vout +1.6V,6A Co 2 x (220uF,15mohm) R2 10.2k R1 10.2k R3 C3 1.5k 2.2nF Device NX2114CSTR NX2114ACSTR Figure1 - Typical application of 2114 ORDERING INFORMATION Temperature 0 to 70oC 0 to 70o C Package SOIC-8L SOIC-8L Frequency 300kHz 600kHz Pb-Free Yes Yes Rev. 4.0 06/20/06 1 NX2114/2114A ABSOLUTE MAXIMUM RATINGS(NOTE1) Vcc to GND & BST to SW voltage ................... 6.5V BST to GND Voltage ...................................... 35V Storage Temperature Range ............................. -65oC to 150oC Operating Junction Temperature Range ............. -40oC to 125oC NOTE1: Stresses above those listed in "ABSOLUTE MAXIMUM RATINGS", may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. PACKAGE INFORMATION 8-PIN PLASTIC SOIC (S) θJA ≈ 130o C/W BST 1 HDrv 2 Gnd 3 LDrv 4 8 SW 7 Comp 6 Fb 5 Vcc ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over Vcc = 5V, and T = 0 to 70oC. Typical values refer to T AA = 25oC. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Reference Voltage Ref Voltage Ref Voltage line regulation Supply Voltage(Vcc) VCC Voltage Range VCC Supply Current (Static) VCC Supply Current (Dynamic) Supply Voltage(VBST) VBST Supply Current (Static) VBST Supply Current (Dynamic) Under Voltage Lockout VCC-Threshold VCC-Hysteresis SYM Test Condition VREF 4.5V


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