LTC3879 Linear Technology Corporation, LTC3879 Datasheet - Page 7

• Manufacturer Part Number: LTC3879
• Description: Wide Operating Range No RSENSE Step-Down Controller
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFORMANCE CHARACTERISTICS
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
1.6
1.0
2.0
1.9
1.8
1.7
1.5
1.4
1.3
1.2
1.1
0
–50
0
Error Amplifi er g
INTV
CC
10
INTV
Load Regulation
0
TEMPERATURE (°C)
CC
LOAD CURRENT (mA)
20
1.4
1.0
0.8
0.6
1.2
m
–50
TRACK/SS Pin Current
vs Temperature
vs Temperature
50
V
V
MODE = INTV
30
IN
OUT
= 12V
= 1.2V
V
40
0
IN
100
TEMPERATURE (°C)
CC
= 12V
3879 G18
3879 G21
50
50
–1000
–1200
–200
–400
–600
–800
25
10
35
30
20
15
0
Shutdown Current
vs Input Voltage
5
INTV
0
100
3879 G24
10
CC
10
INTV
Dropout
15
INPUT VOLTAGE (V)
CC
LOAD CURRENT (mA)
20
20
25
30
30
0.602
0.600
0.598
0.594
0.606
0.604
0.596
V
40
IN
–50
35
= 4.5V
Feedback Reference Voltage
vs Temperature
3879 G19
3879 G22
–30
40
50
–10
TEMPERATURE (°C)
10
2.0
4.0
3.5
3.0
2.5
1.5
1.0
0.5
6
5
4
3
2
1
0
0
30
4.0
0
Quiescent Current vs INTV
INTV
50
4.5
CC
INTV
I
FALLING
LOAD
70
DO NOT EXCEED ≥50mA
CONTINUOUS
V
I
INTV
I
INTV
vs INTV
LIMIT
LIMIT
50
IN
CC
= 18V
90
5.0
CC
CC
= 150mA,
= 22mA,
> 0.7V
< 0.7V
I
110
INTV
LOAD
3879 G25
CC
100
LTC3879
5.5
CC
(mA)
I
LOAD
(V)
6.0
150
CC
6.5
INTV
I
RISING
LOAD
3879 G23
3879 G20
CC
7
3879f
200
7.0