LTC3872_15 Datasheet, PDF (4/22 Pages) Linear Technology – No RSENSE Current Mode Boost DC/DC Controller

LTC3872
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
FB Voltage vs Temperature
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3872 G01
FB Voltage Line Regulation
1.2025
1.2020
1.2015
1.2010
1.2005
1.2000
1.1995
1.1990
0 1 2 3 4 5 6 7 8 9 10
V_IN (V)
3872 G02
I_TH Voltage vs RUN/SS Voltage
2.5
2.0
1.5
1.0
0.5
0
0
V_IN = 2.5V
V_IN = 3.3V
V_IN = 5V
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
RUN VOLTAGE (V)
3872 G03
Shutdown I_Q vs V_IN
14
12
10
8
6
4
2
0
2 3 4 5 6 7 8 9 10
V_IN (V)
3872 G04
Shutdown I_Q vs Temperature
20
15
10
5
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3872 G05
Frequency vs Duty Cycle
600
500
400
300
200
100
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
3278 G06
3872fc
4
For more information www.linear.com/LTC3872