QUICK START GUIDE FOR DEMONSTRATION CIRCUIT
1053A-A through 1053A-D
SYNCHRONOUS BOOST DC/DC CONVERTER
1
LTC3526/3526B/3526-2/3526B-2
DESCRIPTION
Demonstration circuits 1053A-A through 1053A-
D are high efficiency synchronous boost con-
verters capable of operating with an input volt-
age range from 0.9V to 5.5V. The 2X2 mm DFN
thermally enhanced package with a 1MHz
switching frequency (2MHz for LTC3526-2) and
the 500mA internal switches provide a very tiny
solution. The LTC3526 also features output dis-
connect and the input voltage can be greater or
less than the output voltage.
This demonstration circuit allows the user to
quickly evaluate the LTC3526 performance. In-
dividual jumpers are provided for selecting sev-
eral regulated output voltages and a low quies-
cent current shutdown. Terminals on the board
allow easy hookup to an input supply and out-
put load.
Design files for this circuit board are available.
Call the LTC factory.
LTC and Burst Mode are trademarks of Linear Technol-
ogy Corporation
Table 1. Typical Specifications (25°C)
Input Voltage Range V
IN
1V to 5V
1.8V V
OUT
V
IN
= 1V, I
OUT
= 100mA
1.8V ± 2.5%
3.3V V
OUT
V
IN
= 1.5V, I
OUT
= 100mA
3.3V ± 2.5%
5V V
OUT
V
IN
= 1.5V, I
OUT
= 100mA
5.0V ± 2.5%
Output Ripple Voltage (burst mode)
V
IN
= 1.2V, V
OUT
= 1.8V I
OUT
= 1mA
45mV p-p
Output Ripple Voltage (fixed frequency) V
IN
= 1.2V, V
OUT
= 1.8V I
OUT
= 100mA
10mV p-p
Efficiency
V
IN
= 1.2V, V
OUT
= 1.8V I
OUT
= 50mA
85%
Efficiency
V
IN
= 2.5V, V
OUT
= 3.3V I
OUT
= 50mA
92%
V
Input
Power
Supply
A
+
-
V
A
Resistive
Load
Figure 1. Demonstration Circuit Test Setup
