LTC3854_15 Datasheet, PDF (5/28 Pages) Linear Technology – Small Footprint, Wide VIN Range Synchronous Step-Down DC/DC Controller

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3854
Switching Waveforms at No Load
Switching Waveforms at High
Duty Cycle, No Load
V_OUT = 5V
TG
BG
I_L
1µs/DIV
3854 G06
V_OUT = 2.5V
TG
BG
I_L
2µs/DIV
3854 G07
Quiescent Current vs V_IN
1.17
1.16
1.15
1.14
1.13
1.12
1.11
1.10
1.09
6
11 16 21 26 31
V_IN (V)
36
3854 G08
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
60
58
56
54
52
50
48
46
44
42
40
01234567
COMMON MODE VOLTAGE (V)
3854 G11
Quiescent Current vs Temperature
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
–45 –25 –5 15 35 55 75
TEMPERATURE (°C)
95
3854 G09
Maximum Current Sense Threshold
vs Duty Cycle
65
60
55
50
45
40
35
0 20 40 60 80 100 120
DUTY CYCLE (%)
3854 G12
INTV_CC vs Input Voltage
5.05
5.00
4.95
4.90
4.85
4.80
4
9 14 19 24 29 34 39
V_IN (V)
3854 G10
Maximum Current Sense Voltage
vs Feedback Voltage
(Current Foldback)
60
50
40
30
20
10
0
0 0.05 0.15 0.25 0.35 0.45 0.55 0.65 0.75
FB (V)
3854 G13
3854fb
5