1
dc2120af
DEMO MANUAL DC2120A
Description
LT3048-15
Low Noise Bias Generator
Demonstration circuit 2120A features the
LT3048-15
, a
Boost DC/DC Converter with integrated Schottky diode and
LDO in a 2mm
×
2mm DFN package. This demo board is
designed to convert a 2.7V to 4.8V input to a 15V output
at 19mA to 35mA with low output ripple and noise. The
LT3048-15 is programmed for 2MHz switching frequency.
This demonstration board can be used to evaluate other
fixed output voltage versions of the LT3048.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
performance summary
The LT3048 data sheet gives a complete description of
the part, operation, and application information. The data
sheet must be read in conjunction with this Quick Start
Guide for the demo circuit DC2120A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2120A
Specifications are at T
A
= 25°C
Figure 1. DC2120A Efficiency
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply Range
2.7
4.8
V
Output Voltage Range
V
IN
= 2.7V, I
OUT
= 19mA
14.625
15
15.375
V
Switching Frequency
1.7
2.2
2.7
MHz
Output Ripple
V
IN
= 4.8V, Load = 37mA
1
mV
OUTPUT CURRENT (mA)
2
EFFICIENCY (%)
80
70
50
60
40
20
30
10
10
18
6
14
26
dc2120a F01
38
22
30 34
2.7V
IN
4.8V
IN
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