Linear Technology LTC3459ES6 Manuel utilisateur

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 703

10V MICROPOWER SYNCHRONOUS BOOST CONVERTER IN THINSOT

LTC3459ES6

DESCRIPTION

Demonstration circuit 703 features the LTC3459

10V micropower synchronous boost converter.

The circuit in DC703 is designed to generate an

8V output from a 1.8V to 5.5V input voltage range.

The maximum output current is listed on the

DC703 silkscreen and is dependent on the output

voltage.

The boost converter circuit is enabled using JP1.

Placing the jumper to “OFF” turns off the boost

converter and the output goes to 0V. Placing the

jumper to “ON” enables the boost converter and

allows the output to rise to a regulated 8V. The

SHDN pin is also accessible via the turret, J4.

Design files for this circuit board are available.

Call the LTC factory.

________________________________________________

LT is a trademark of Linear Technology Corporation

Table 1.

Performance Summary (T

= 25°C unless otherwise noted)

PARAMETER FOR BOOST CONVERTER CONDITION VALUE

Minimum Input Voltage 1.5V

Maximum Input Voltage 5.5V

Maximum Output Current With 5.5V input 40mA

Typical Efficiency With 5.5V input and 2~40mA load >85%

Programmable output voltage range 2.5V ~ 10V

QUICK START PROCEDURE

Demonstration circuit 703 is easy to set up to

evaluate the performance of the LT3459. Refer

to Figure 1 for proper measurement equipment

setup and follow the procedure below:

1. With power off, connect the input power sup-

ply to

VIN

and

GND

. Make sure JP1 is set to

“ON”.

2. Set the input supply between 1.8V to 5.5V.

Turn on the power at the input and observe

the output voltage across

VOUT

and

GND

The output voltage should read

≅

8V.

3. Turn on the load (follow the chart on the

demo board silkscreen for input voltage and

output current). The output voltage should

be regulating to

≅

8V with different load con-

ditions.

4. Test the SHDN function by placing the

jumper JP1 to “OFF”. The output voltage

should read 0V. Enable the boost converter

by placing the jumper (JP1) back to “ON”.

The output should now read

≅

8V.

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 703

10V MICROPOWER SYNCHRONOUS BOOST CONVERTER IN THINSOT

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 703

10V MICROPOWER SYNCHRONOUS BOOST CONVERTER IN THINSOT

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