QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 612
BOOST CONVERTER
1
LT3464ETS8
DESCRIPTION
Demonstration circuit 612 features the LT3464ETS8 in
two boost converter circuits, one configured for small
size and the other for high performance. The small size
circuit demonstrates the LT3464’s ability to operate with
a small 10µH chip inductor and a 0.22µF output capaci-
tor. The high performance circuit uses a 47µH inductor
and 1.0µF output capacitor and provides higher output
current and efficiency. Refer to Tables 1 and 2 for the
performance summary. The Burst Mode Operation of the
LT3464 allows the circuits to have a low input current at
no load and high efficiency over a broad current range
making it an ideal part for LCD bias applications as well
as cellular phones, digital cameras and handheld com-
puters. In addition, the LT3464’s integrated schottky re-
duces parts count, its integrated PNP disconnect switch
removes the load from the input during shutdown and
provides short circuit protection, and its CNTL pin allows
the output voltage to be externally controlled.
Design files for this circuit board are available. Call
the LTC factory.
Table 1.
Performance Summary for the Small Size Circuit
PARAMETER
CONDITION
VALUE
Input Voltage Range
2.3V to 10.0V
VOUT
0mA to IOUT(MAX)
20.0V ±4%
IOUT(MAX)
VIN = 3.6V
VIN = 5.0V
VIN = 8.4V
3mA
4mA
6mA
Typical output ripple
VIN = 3.6V, IOUT = 3mA
100mV p-p
Typical efficiency
VIN = 3.6V, IOUT = 3mA
60%
Typical no load input current
VIN = 3.6V, IOUT = 0mA
85µA
Table 2.
Performance Summary for the High Performance Circuit
PARAMETER
CONDITION
VALUE
Input Voltage Range
2.3V to 10.0V
V
OUT
0mA to IOUT(MAX)
15.0V ±4%
I
OUT(MAX)
V
IN
= 3.6V
V
IN
= 5.0V
V
IN
= 8.4V
9mA
14mA
25mA
Typical output ripple
VIN = 3.6V, IOUT = 9mA
100mV p-p
Typical efficiency
VIN = 3.6V, IOUT = 9mA
77%
Typical no load input current
VIN = 3.6V, IOUT = 0mA
60µA