Datasheet

LTC3838
9
3838fa
TYPICAL PERFORMANCE CHARACTERISTICS
RUN Pin Thresholds
vs Temperature
RUN Pull-Up Currents
vs Temperature
TRACK/SS Pull-Up Currents
vs Temperature
INTV
CC
Undervoltage Lockout
Thresholds vs Temperature
Shutdown Current Into V
IN
Pin
vs Voltage on V
IN
Pin
Quiescent Current Into V
IN
Pin
vs Temperature
Current Sense Voltage
vs ITH Voltage
Maximum Current Sense Voltage
vs Temperature
Maximum Current Sense Voltage
vs Voltage on SENSE
–
Pin
ITH VOLTAGE (V)
0
–60
CURRENT SENSE VOLTAGE (mV)
–40
0
20
40
1.6
120
3838 G28
–20
0.8
0.4
2
1.2 2.4
60
80
100
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
–50
0
MAXIMUM CURRENT SENSE VOLTAGE (mV)
20
40
60
80
050
100
150
3838 G29
100
120
–25 25
75
125
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V
TEMPERATURE (°C)
–50
RUN PIN THRESHOLDS (V)
0.8
1.2
150
3838 G30
0.4
0
0
50
100
–25
25
75
125
1.6
0.6
1.0
0.2
1.4
SWITCHING REGION
SHUTDOWN REGION
STAND-BY REGION
TEMPERATURE (°C)
–50
CURRENT (µA)
4
6
150
3838 G31
2
0
0
50
100
–25
25
75
125
8
3
5
1
7
RUN PIN ABOVE 1.2V
SWITCHING THRESHOLD
RUN PIN BELOW 1.2V
SWITCHING THRESHOLD
TEMPERATURE (°C)
–50
CURRENT (µA)
1.00
1.10
150
3838 G32
0.90
0.80
0
50
100
–25
25
75
125
1.20
0.95
1.05
0.85
1.15
TEMPERATURE (°C)
–50
3.3
UVLO THRESHOLDS (V)
3.5
3.7
3.9
4.1
050
100
150
3838 G33
4.3
4.5
–25 25
75
125
UVLO RELEASE
(INTV
CC
RISING)
UVLO LOCK
(INTV
CC
FALLING)
V
IN
(V)
0
CURRENT (µA)
20
30
40
3838 G34
10
0
10
20
30
5
15
25
35
40
15
25
5
35
130°C
25°C
–45°C
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (mA)
2.5
3.0
3.5
25 75 150
3838 G35
2.0
1.5
1.0
–25 0
50
100 125
BOTH CHANNELS ON
CHANNEL 1 ON ONLY
CHANNEL 2 ON ONLY
SENSE PIN VOLTAGE (V)
–0.5
0
MAXIMUM CURRENT SENSE
–
VOLTAGE (mV)
20
40
60
80
120
0.5
1.5 2.5 3.5
3838 G22
4.5 5.5
100
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V