2

DEMO MANUAL DC2702B-B

Rev. 0

QUICK START PROCEDURE

Demonstration circuit 2702B-B is easy to set up to evalu-

ate the performance of the LTM4700EY. See Figure 2 for

the proper measurement equipment setup and follow the

procedure below.

1. With power off, connect the input power supply to VIN

(4.5V to 16V) and GND (input return).

2. Connect the 1.0V output load between VOUT0 and GND

(Initial load: no load).

3. Connect the Digital Voltmeters (DVMs) to the input

and outputs. Set default jumper position:

JP1:

ON

JP2:

ON

JP3:

ON

4. Turnontheinputpowersupplyandcheckfortheproper

output voltages. VOUT0 should be 1.0V ±0.5%.

5. Once the proper output voltages are established,

adjust the loads within the operating range and ob-

serve the output voltage regulation, ripple voltage and

other parameters.

6. Connect the dongle and control the output voltages

fromtheGUI.Formoredetails,refertotheLTpowerPlay

GUI for the LTM4700 Quick Start Guide.

Notes

The internal bias circuit is enabled when VIN >7V and JP3

is ON.

When measuring the output or input voltage ripple, do

not use the long ground lead on the oscilloscope probe.

See Figure 3 for the proper scope probe technique. Short,

stiff leads need to be soldered to the (+) and (–) terminals

of an output capacitor. The probe’s ground ring needs to

touch the (–) lead, and the probe tip needs to touch the

(+) lead.

PERFORMANCE SUMMARY Specifications are at T

A = 25°C

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

4.5

16

V

Output Voltage, VOUT0

VIN = 4.5V to 16V, IOUT0 = 0A to 100A

0.5

1.0

1.8

V

Maximum Output Current, IOUT0

VIN = 4.5V to 16V, VOUT0 = 0.5V to 1.8V

100

A

Typical Efficiency

VIN = 12V, VOUT0 = 1.0V, IOUT0 = 100A

88.7 (See Figure 5)

%

Default Switching Frequency

350

kHz

MAXIMUM OUTPUT CURRENT

NUMBER OF OUTPUTS

NUMBER OF LTM4700 µModule

REGULATORS ON THE BOARD

DEMO BOARD NUMBER

50A

2

1

DC2702B-A

100A

1

1

DC2702B-B

200A

1

2

DC2784B-A

300A

1

3

DC2784B-B

400A

1

4

DC2784B-C