Linear Technology LTC3459ES6 Quick Start Manual

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 703

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
Table 1. Performance Summary (T
PARAMETER FOR BOOST CONVERTER
Minimum Input Voltage
Maximum Input Voltage
Maximum Output Current
Typical Efficiency
Programmable output voltage range

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
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10V MICROPOWER SYNCHRONOUS BOOST CONVERTER IN THINSOT
= 25°C unless otherwise noted)
A
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
CONDITION
With 5.5V input
With 5.5V input and 2~40mA load
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.
LTC3459ES6
VALUE
1.5V
5.5V
40mA
>85%
2.5V ~ 10V
1