3

dc1973af

DEMO MANUAL DC1973A

Quick start proceDure

Demonstration circuit 1973A is easy to set up to evalu-

ate the performance of the LT8697. Refer to Figure 2 and

Figure 3 for proper measurement equipment setup and

follow the procedure below:

and GND.

2. Withpoweroff,connecttheloadtoVCABLEandC_GND.

3. Set X1 to X5 to OPEN positions.

4. Turn on the power at the input.

5. Carefully evaluate other design parameters as needed.

6. If a USB device is to be connected to J3, use Table 1 as

a guide to set X1 to X4 for different USB applications.

The total current provided at J3 and VCABLE should

not exceed 2.1A.

7. Set X5 to V+ if a quick transient test is desirable. The

load step applied to VCABLE is 500mA. Again, make

sure the total load current does not exceed 2.1A during

the test.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Range

6

42

V

Output Voltage

4.8

5

5.2

V

Maximum Output Current

2.1

A

Switching Frequency

1.9

2

2.05

MHz

EFE

Efficiency at DC

91

%