LTC3855 LINER [Linear Technology], LTC3855 Datasheet - Page 9

• Manufacturer Part Number: LTC3855
• Description: Dual, Fast, Accurate Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

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