Datasheet
LTC3872
4
3872fc
For more information www.linear.com/LTC3872
DUTY CYCLE (%)
0
FREQUENCY (kHz)
200
400
600
100
300
500
20 40 60 80
3278 G06
100
100 30 50 70 90
V
IN
(V)
2
SHUTDOWN MODE IQ (µA)
8
10
12
8
3872 G04
6
4
4
3
5
7
96
10
2
0
14
TEMPERATURE (°C)
–50
0
SHUTDOWN IQ (µA)
5
10
15
20
–25 0 25 50
3872 G05
75 100 125
150
Shutdown I
Q
vs V
IN
Shutdown I
Q
vs Temperature
Frequency vs Duty Cycle
Typical perForMance characTerisTics
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–60
FB VOLTAGE (V)
1.22
1.23
1.24
6040
3872 G01
1.21
1.20
–20–40 200
100
80
1.19
1.18
1.25
V
IN
(V)
0
1.1990
FB VOLTAGE (V)
1.1995
1.2005
1.2010
1.2015
1.2025
1
5
7
3872 G02
1.2000
1.2020
4
9
10
2
3
6 8
RUN VOLTAGE (V)
0
I
TH
VOLTAGE (V)
1.5
2.0
2.5
4.0
3872 G03
1.0
0.5
0
0.5 1.0 1.5
2.0 2.5
3.0 3.5 4.5
5.0
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
FB Voltage vs Temperature
FB Voltage Line Regulation
I
TH
Voltage vs RUN/SS Voltage