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dc1743af

DEMO MANUAL DC1743A

Description

LTM4613

8A, High Voltage Power

µModule Regulator

DemonstrationcircuitDC1743AfeaturestheLTM®4613EV,

anEN55022classBcertified,highinputandoutputvoltage,

high efficiency, switch mode step-down power µModule®

regulator. The input voltage range is from 5V to 36V. The

output voltage is jumper programmable from 3.3V to 12V

with a rated load current of 8A. Derating is necessary

for certain VIN, VOUT, frequency and thermal conditions:

please refer to LTM4613 data sheet for derating curves.

Only input and output capacitors are needed externally.

The DC1743A offers the TRACK/SS pin allowing the user

to program output tracking or soft-start period. Output

perForMAnce sUMMArY

BoArD photo

voltage margining can also be realized through jumper

position selections.

Higherefficiencyatlowloadcurrentsisachievedbysetting

the MODE pin jumper to DCM. The PLL pin is available

to synchronize the LTM4613EV to an external clock. The

LTM4613 data sheet must be read in conjunction with

this demo manual prior to working on or modifying demo

circuit DC1743A.

Design files for this circuit board are available at

http://www.linear.com/demo

(TA = 25°C)

PARAMETER

CONDITIONS

VALUE

Input Voltage Range

5V to 36V

Output Voltage VOUT

Jumper Selectable

3.3V, 5V, 12V; ± 2%

Maximum Continuous Output Current

Derating Is Necessary for Certain Operating Conditions. See Data Sheet

for Details.

8ADC

Default Operating Frequency

VOUT = 12V

VOUT = 5V

VOUT = 3.3V

600kHz

250kHz

165kHz

Efficiency

VIN = 12V, VOUT = 5V, IOUT = 8A

93.0% See Figure 3

Load Transient

VIN = 12V, VOUT = 5V

See Figure 4

L

, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of

Linear Technology Corporation. All other trademarks are the property of their respective owners.