Convertors distribute efficiently from a 5V bus

Edited by the Electronicstalk editorial team Feb 19, 2003

Datel's new LSN D5 series SIPs are nonisolated DC/DC convertors that accept 5V inputs (4.5-5.5V input range) and deliver 1, 1.2, 1.5, 1.8, 2, 2.5 and 3.3V outputs fully rated at 10A.

Datel's new LSN D5 series SIPs are nonisolated DC/DC convertors that accept 5V inputs (4.5-5.5V input range) and deliver 1, 1.2, 1.5, 1.8, 2, 2.5 and 3.3V outputs fully rated at 10A.

The LSN's single-inline packages (2 x 0.5x 0.34in) can be configured in either vertical or horizontal orientations.

The former occupies a mere 0.7in2.

The latter is a mere 0.34in high.

LSN D5s are true plug-and-play power convertors enabling power-system architects to configure solutions in minutes.

In most applications, LSNs require no external I/O filtering to achieve either specified noise levels or FCC-compliant radiated/conducted emissions.

They are designed with onboard input/output capacitors fully rated to handle the required input ripple current and fully capable of reducing output noise to specified levels.

The units need no transformers, optocouplers or FET drive circuits in the secondary, offering considerable cost savings.

For designers upgrading the performance of traditional 5V systems (such as blade-server or mass-storage cards) who require lower voltages (1-3.3V) for new processors, PLDs or ASICs, the LSN D5 SIPs efficiently and cost effectively deliver any voltage where it is needed.

And for designers contemplating an intermediate-bus architecture as a means of saving money in new moderate-power, multi voltage applications, analysis shows that 5V onboard buses (which cost no more than 12V intermediate buses) can achieve higher overall system efficiencies.

This is due to the outstanding efficiencies achievable by 5V-input nonisolated LSN D5s.

The D5 LSN's best in class power density is achieved with fully synchronous, fixed-frequency (300kHz), buck topology that delivers: high efficiency (96% for 3.3V output models at 50% load), low noise (10mV peak-peak typical, 35mV peak-peak maximum), tight line/load regulations (+/-0.1%/+/-0.25% maximum), quick step response (50ms), stable no-load operation (for load circuits going into sleep mode), and no output reverse conduction.

High efficiency enables LSN SIPs to deliver more output current at temperature than all competing devices, claims Datel.

All LSN D5s deliver full power to at least +65C with no supplemental air flow.

With minimal air (100 litre/min), all models operate at full power to at least +75C.

The LSN feature set includes output over current detection, continuous short circuit protection, thermal shutdown (+115C), +/-10% output voltage trim, remote on/off control, output sense pins, optional vertical or horizontal package orientation, and optional reverse pinning on vertical models.

Free LSN D5 sample/evaluation units for qualified OEMs, and/or preproduction quantities up to 25 pieces, are immediately available from stock.

Production quantities require 6-8 weeks.

Small quantities of LSN D5 series SIP DC/DC convertors (or free sample/evaluation units) can be ordered directly from the Datel website using credit cards.