NXA66 Series S i ng l e outp u t ( Non - I s o l a t ed ) Transient response from 0 A to rated full load (up to 30 A/s), recovery within 250 s Democratic current sharing, no need for master/slave con guration Programmable output voltage Remote enable pin Power good signal True double ended di erential remote sense Available RoHS compliant The NXA66 non-isolated dc-dc converter is targeted at computing applications that require point of load power conversion. The NXA66 is designed to meet the precise voltage and fast transient requirements of todays high performance applications such as workstations, le servers, desktop computers, telecommunications equipment, adapter cards, DSP and data processing. Employing synchronous recti cation and democratic current sharing, the NXA66 can be used in a stand-alone con guration, or paralleled as a building block to achieve higher output currents or redundancy. The current sharing speci cations are met during static conditions, and transient conditions. The advanced democratic current sharing technique employed by the NXA66 removes the need for cumbersome master/slave combinations. The NXA66 uses gold plated edge tab ngers for a convenient, low impedance interconnect scheme. This also allows system designers to easily accommodate future expansion in their systems. 2 YEAR WARRANTY All speci cations ar e typical at nominal input, full load at 25 C unless otherwise stated SPECIFICA TIONS OUTPUT SPECIFICATIONS GENERAL SPECIFICATIONS Voltage adjustability Vout programmable E fficiency 3V3 output 86% to 2V5 or 3V3 2V5 output 82% Total error band 3V3 output 4.5% S witching frequency Fixed 300 kHz 2V5 output 4.5% Approvals and E N60950 Ripple and noise (20 MHz bandwidth) 150 mV pk-pk max. standards B i-national UL1950 CSA C22.2 No. 234/950 Transient response 50% to 75% and back 150 mV peak dev. settling time to 1.0%, no external cap. 400 s Weight 42.6 g (1.5 oz) S hort circuit protection C ontinuous MTBF Bellcore 332 3,500,000 hours Isc = 25 A rms automatic recovery ENVIRONMENT AL SPECIFICA TIONS INPUT SPECIFICA TIONS Maximum temperatur e Operating 5 C/10 min. Input voltage range 12 V in nominal 10.8-13.2 Vdc shock Input current No load 100 mA typ. Temperature shock Operating 10 C/hour Remote OFF 10 mA max. Non-operating 20 C/hour UVLO tur n ON voltage 10.4 V max. Humidity Operating 85% RH UVLO tur n OFF voltage 8.2 V min. Storage 95% RH Star t-up time Nominal line 15 ms Altitude Operating 10,000 feet max. Storage 50,000 feet max. Active high remote ON/OFF Shock Operational and 50 G 11ms Logic compatibility R ef. to -input non-operational half sine wave ON Open circuit voltage 10.8 Vdc min. OFF 0.8 Vdc max. 2 Vibration Operational and 0.02 G /Hz max. (See Note 3) non-operational Electrostatic discharge Operating (See Note 4) ESD 15 kV non-operating ESD 25 kV File Name: nxa66.pdf Rev (02): 20 Dec 2005 EOLNXA66 Series S i ng l e outp u t ( Non - I s o l a t ed ) INPUT NOMINAL OUTPUT NOMINAL OUTPUT MINIMUM MODEL (5,6) VOLTAGE VOLTAGE CURRENT EFFICIENCY NUMBER 12 Vdc 3.3/2.5 Vdc 20 A 86/82% NXA66-12P 3V3C Y Notes Notes C ond. 1 In this view, row B of the edge connector is visible. The leftmost pin is pin 4 Initilization level ESD event shall cause no out-of-regulation conditions. 50, and the rightmost pin is pin 26. Row A of the connector is on the 5 The Y su x indicates that these parts are TSE RoHS 5/6 (non Pb-free) opposite side of the unit. Pin 1 is behind pin 50, pin 25 is behind pin 26. compliant. S ee below for pinout. 6 NOTICE: Some models do not support all options. Please contact your 2 R ecommended mating connector is AMP 145432 or equivalent. Pin 44 is local Emerson representative or use the on-line model number search tool absent and is used for electrical key. AMP keying plug PN 65025-2 may at