2

DEMO MANUAL DC3071A

Rev. 0

QUICK START PROCEDURE

Demonstration circuit 3071A is easy to set up to evalu-

ate the performance of the LTM8080. See Figure 1 for

the proper measurement equipment setup and follow the

procedure below.

1. With the power off, place the jumpers as shown in the

following positions.

JUMPER

POSITION

FUNCTION

JP1

ON

RUN

JP2

BURST

SYNC

2. Before connecting the input supply, load, and meters,

preset the input voltage supply to be between 4V to

40V. Then, preset the load currents to 0A.

3. With power off, connect the output loads between

VOUT1 and GND, VOUT2 and GND, input voltage

supply, respectively. (Initial load: no load). Refer

to Figure 1.

4. Connect the DVMs to the input and outputs.

5. Turn on the input power supply and adjust the volt-

age to 12V.

NOTE: Make sure that the input voltage does not

exceed 40V.

6. Check for the proper output voltages from VOUT1 to

GND and VOUT2 to GND. The output voltage meters

for each phase should display the programmed out-

put voltage within ±2%.

7. Once the proper output voltage is established, adjust

the load current from 0A to 500mA, VOUT should be

within 3.234V to 3.366V.

8. Vary the input voltage from 4V to 40V, VOUT should

be within 3.234V to 3.366V.

9. After completing all tests, adjust the load to 0A and

power of the input power supply.

OPTIONAL: An input EMI filter is included on the board.

To include this filter, connect the input supply positive

terminal to VEMI. Connect the input positive supply to

VIN to exclude the input EMI filter.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Supply Range

Continuous Operation, Free Air

4.0

40

V

VOUT1

Output Voltage 1

3.3

V

VOUT2

Output Voltage 2

3.3

V

IOUT1

Output Current 1

0.5

A

IOUT2

Output Current 2

0.5

A

POUT/PIN

Efficiency (See Figure 3)

VIN = 12V, VOUT = 3.3V, IOUT = 0.5A

64.7

%

PERFORMANCE SUMMARY Specifications are at T

A = 25°C