ltc3890-1 Linear Technology Corporation, ltc3890-1 Datasheet - Page 6

• Manufacturer Part Number: ltc3890-1
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

LTC3890-1
TYPICAL PERFORMANCE CHARACTERISTICS
6
–40
250
200
150
100
–20
300
80
60
20
10
50
40
20
80
70
60
50
40
30
0
0
0
0
0
5
Total Input Supply Current
vs Input Voltage
Maximum Current Sense Voltage
vs I
Foldback Current Limit
10
FORCED CONTINUOUS MODE
100
0.2
TH
300μA
PULSE SKIPPING MODE
15
Voltage
OPERATION
Burst Mode
200
20
FEEDBACK VOLTAGE (MV)
0.4
INPUT VOLTAGE (V)
NO LOAD
25
300
0.6
30 35 40 45 50 55 60 65
V
ITH
400 500
(V)
0.8
1.0
600
1.2
700
38901 G10
38901 G13
3890 G16
1.4
800
–100
–200
–300
–400
–500
–600
–700
–800
6.0
5.8
5.6
5.4
5.2
5.0
4.8
4.6
4.4
4.2
4.0
50
80
75
70
65
60
55
45
40
0
–45
–45
EXTV
Voltages vs Temperature
SENSE
0
Quiescent Current vs Temperature
–20
–20
CC
5
–
Switchover and INTV
Pin Input Bias Current
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
10
EXTV
EXTV
30
30
INTV
CC
CC
15
55
55
FALLING
RISING
CC
80
80
20
105
105
CC
38901 G11
38901 G17
25
38901 G14
130
130
5.20
5.15
5.05
5.00
4.95
5.10
90
85
80
75
70
65
60
5.2
5.1
5.0
4.9
4.8
0
0
Maximum Current Sense
Threshold vs Duty Cycle
INTV
5
V
INTV
IN
20 40 60 80 100 120 140
10
10
= 12V
CC
CC
15
20
vs Load Current
Line Regulation
20
LOAD CURRENT (mA)
30
INPUT VOLTAGE (V)
DUTY CYCLE (%)
25
40 50
EXTV
30 35 40 45 50 55 60 65
EXTV
CC
CC
= 8.5V
60
= 0V
70
160
80
180 200
38901 G15
38901 G18
90
38901 G12
38901f
100