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dc1829af

DEMO MANUAL DC1829A

DESCRIPTION

LTC3866EUF

High Efficiency Step-Down Converter

with Very Low DCR Inductor

Demonstration circuit 1829A is a high efficiency, high

density, synchronous buck converter with 4.5V to 14V

input voltage range. It can supply a 30A maximum load

current with a 1.5V output. This demo board utilizes the

buck controller with very low DCR current sensing capabil-

ity, on-chip drivers and remote output voltage sensing. This

board is setup with 0.32mΩ DCR inductor. The temperature

compensation function guarantees accurate current limit

over a wide temperature range with DCR sensing.

The LTC3866 is suitable for operation from an input voltage

of 4.5V to 38V and output voltages up to 3.5V. It can provide

high efficiency, high power density and versatile power

solutions for telecom and datacom systems, industrial and

medical instruments, along with DC power distribution

systems and computer systems. The LTC3866 is available

in 24-pin 4mm

× 4mm QFN and 24-lead FE packages.

L, LT, LTC, LTM, μModule, Linear Technology, the Linear logo and Burst Mode are registered

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

respective owners.

PERFORMANCE SUMMARY

To shut down the converter, set the RUN pin voltage below

operation, pulse skipping mode or forced continuous mode

operation at light load. Switching frequency is preset at

about 400kHz, and it can be easily modified from 250kHz

to 770kHz. Onboard dynamic circuit is also available for

transient test. Please see LTC3866 data sheet for more

detailed information.

Design files for this circuit board are available at

http://www.linear.com/demo

PARAMETER

CONDITION

VALUE

Input Voltage Range

4.5V to 14V

1.5V ±2%

30A

Typical Efficiency

90.3%

Typical Switching Frequency

400kHz