ltc3850gn-2 Linear Technology Corporation, ltc3850gn-2 Datasheet - Page 6

• Manufacturer Part Number: ltc3850gn-2
• Description: Dual, 2-phase Synchronous Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

LTC3850-2
TYPICAL PERFORMANCE CHARACTERISTICS
6
1.5Ω LOAD
3Ω LOAD
TK/SS1
TK/SS2
2V/DIV
1V/DIV
1V/DIV
V
V
OUT1
OUT2
3.3V
1.8V
–20
–40
80
60
40
20
0
0
Tracking Up and Down
with External Ramp
Current Sense Threshold
vs I
TH
Voltage
0.5
10ms/DIV
60
50
30
80
70
40
20
10
V
0
ITH
0
Maximum Current Sense Voltage vs
Feedback Voltage (Current Foldback)
1
(V)
0.1
0.2
1.5
FEEDBACK VOLTAGE (V)
0.3
38502 G10
38502 G13
0.4
2
0.5
0.6
0.7
70
60
40
30
20
80
50
10
0
5
4
3
2
1
0
0
5
Quiescent Current
vs Input Voltage without EXTV
Maximum Current Sense Threshold
vs Common Mode Voltage
0.8
38502 G16
V
0.9
SENSE
1
10
COMMON MODE VOLTAGE (V)
INPUT VOLTAGE (V)
2
15
3
2.00
1.75
1.50
1.25
1.00
–50
20
TK/SS Pull-Up Current
vs Temperature
4
–25
38502 G14
CC
38502 G11
25
5
TEMPERATURE (°C)
0
5.25
5.00
4.75
4.50
4.25
4.00
3.75
3.50
100
25
90
80
70
60
50
40
30
20
10
0
0
0
INTV
Maximum Current Sense
Threshold vs Duty Cycle
50
CC
20
5
Line Regulation
75
INPUT VOLTAGE (V)
38502 G17
DUTY CYCLE (%)
10
40
100
60
15
20
80
38502 G12
38502 G15
38502f
100
25