DC/DC Converter

Programmable, Single Output, 1.1V - 1.85Vout @ 60A

DC/DC Converter

12.0V input, 1.2 to 5.0V adjustable output, 20A or 55W

1150 Eglinton Avenue East

4607 S.E. International Way

Toronto, Ontario M3C 1H7

Milwaukie, Oregon 97222

1-866-740-1232

www.cdtechno-cps.com

1-971-206-2800

S020_084-S020-00_RevC_Jan12-2005.fm

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Output Level

Output Capacitance *

+5V

One 680uF, 6.3V SP OSCON

+3.3V

One 820uF, 4V SP OSCON

+2.5V

One 820uF, 4V SP OSCON

+1.8V

One 820uF, 4V SP OSCON

+1.5

One 820uF, 4V SP OSCON

1.25V

One 820uF, 4V SP OSCON

1.2V

One 820uF, 4V SP OSCON

Or equivalent. MBZ type AL-E caps

or POSCAPs may be used instead.

Input and Output Capacitance

The power supply requires the following capacitance (or equivalent) on the PWB.

* Output Ceramic Capacitance > 60µF located close to the module

Output Transient Response (Dynamic Loading)

The output voltages will remain within their regulation limits specified for the load steps defined

below. The maximum over/undershoot voltages will not exceed those defined below and will not

cause any over or undervoltage detection circuits to activate. The load slew rate will not exceed

10A/µS. Recommended input and output capacitors should be used to meet the Spec.

Output

Level

Maximum Load

Step

Minimum Starting

DC Load

Voltage

Over/Undershoot

+5V

50%

0A

±4%

+3.3V

50%

0A

±5%

+2.5V

50%

0A

±5%

+1.8V

50%

0A

±7%

+1.5

50%

0A

±7%

1.25V

50%

0A

±10%

1.2V

50%

0A

±10%

INPUT CAPACITANCE

Although input capacitance value is not critical, the input capacitors must be capable of storing

fairly large amounts of energy. The primary criteria, though, for choosing the input capacitors is AC

ripple current rating. The SIP datasheet contains a chart showing ripple current vs. output current

(or output power). The system designer determines the maximum SIP output current required from

the SIP. Based on that number, the chart will show a corresponding ripple current rating the

designer needs to plan for when choosing input capacitors. Suggested capacitors are OSCONS,

MBZ type AL-E or POSCAPS. It is advised that the ripple current capacity of the capacitor be

derated to the estimated ambient temperature. Capacitors of at least 16V are necessary and the

user should also place >22µF of ceramics close to the module.