LTC3854_15 Datasheet, PDF (6/28 Pages) Linear Technology – Small Footprint, Wide VIN Range Synchronous Step-Down DC/DC Controller

LTC3854
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
440
430
420
410
400
390
380
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
3854 G15
Current Sense Threshold
vs I_TH Voltage
60
50
40
30
20
10
0
–10
0 0.5 1 1.5 2 2.5 3
V_ITH (V)
3854 G18
INTV_CC Load Regulation
5.20
V_IN = 15V
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
0
5 10 15 20 25 30 35 40
LDO CURRENT (mA)
3854 G21
6
Undervoltage Lockout Falling
Threshold vs Temperature
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
3854 G16
Shutdown Current
vs Input Voltage
30
25
20
15
10
5
0
4 8 12 16 20 24 28 32 36 40
V_IN (V)
3854 G19
INTV_CC vs Temperature
5.20
I_LOAD = 10mA
5.15 ^{VIN = 15V}
5.10
5.05
5.00
4.95
4.90
4.85
4.80
–45 –30 –15 0 15 30 45 60 75 90 105
TEMPERATURE (°C)
3854 G22
Oscillator Frequency vs V_IN
440
430
420
410
400
390
380
370
360
5
10 15 20 25 30 35 40
V_IN (V)
3854 G17
Shutdown Current vs Temperature
20
V_IN = 15V
19
18
17
16
15
14
13
12
11
10
–45 –30 –15 0 15 30 45 60 75 90 105
TEMPERATURE (°C)
3854 G20
RUN/SS Shutdown Threshold
vs Temperature
1.40
1.35
1.30
1.25
1.20
1.15
1.10
–45 –30 –15 0 15 30 45 60 75 90 105
TEMPERATURE (°C)
3854 G23
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