Single output (Non-Isolated)
DC-DC CONVERTERS 66 W Non-isolated DC-DC Converters
• Transient response from 0 A to rated full load
(up to 30 A/µs), recovery within 250 µs
• Democratic current sharing, no need for master/slave
• Programmable output voltage
• Remote enable pin
• Power good signal
• True double ended differential 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 today’s high performance applications such
as workstations, file servers, desktop computers, telecommunications equipment,
adapter cards, DSP and data processing. Employing synchronous rectification and
democratic current sharing, the NXA66 can be used in a stand-alone configuration, or
paralleled as a building block to achieve higher output currents or redundancy. The
current sharing specifications 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 fingers for a convenient, low impedance interconnect scheme. This also
allows system designers to easily accommodate future expansion in their systems.
All specifications are typical at nominal input, full load at 25 °C unless otherwise stated
2 YEAR WARRANTY
to 2V5 or 3V3
Total error band
Ripple and noise
(20 MHz bandwidth) 150 mV pk-pk max.
50% to 75% and back
peak dev. settling time to 1.0%, no external cap.
Short circuit protection
Isc = 25 A rms
Input voltage range
12 Vin nominal
100 mA typ.
10 mA max.
UVLO turn ON voltage
UVLO turn OFF voltage
10.4 V max.
8.2 V min.
Active high remote ON/OFF
ON Open circuit voltage
Ref. to -input
10.8 Vdc min.
0.8 Vdc max.
CSA C22.2 No. 234/950
42.6 g (1.5 oz)
Maximum temperature Operating
5 ˚C/10 min.
10,000 feet max.
50,000 feet max.
50 G 11ms
half sine wave
(See Note 3)
0.02 G2/Hz max.
Operating (See Note 4)
ESD 15 kV
ESD 25 kV
File Name: nxa66.pdf Rev (02): 20 Dec 2005