QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 482
100mA REGULATED CHARGE PUMP INVERTER
LT1983-5
DESCRIPTION
Demonstration circuit 482 is a regulated DC/DC Charge
Pump inverter using the LTC1983-5 that produces a
regulated negative –5V output voltage at up to 100mA of
output current from 3V to 6V input. It demonstrates the
small size, ease of use and appropriate layout techniques
for the LTC1983-5 charge pump inverter. The circuit re-
quires only small surface mount components, resulting
in very small board space. This power supply circuit is
particularly useful for applications such as portable
equipment and –5V generation in single supply systems
that require extremely low quiescent current and ex-
tremely small size.
Design files for this circuit board are available. Call
the LTC factory.
QUICK START PROCEDURE
Refer to Figure 1 for proper measurement equipment
setup and follow the procedure below:
1.
Apply a voltage source to the input of the circuit be-
tween Connect input power to the Vin
and the GND
terminals. Input voltage is limited to between 3V to
5.5V.
2.
Connect load between the GND and the Vout termi-
nals.
3.
To shut down the circuit, connect the JP1 to the off
position. Connect JP1 to the on position to enable
normal operation.
+
–
+
–
+
–
+
–
+
–
LOAD
+
–
Figure 1.
Proper Measurement Equipment Setup
1
