Datasheet

LT3686A
5
3686afa
Switching Frequency vs R
T
Switching Frequency vs
Temperature
Soft-Start/Track vs Frequency
(1MHz)
Soft-Start/Track vs V
FB
EN/UVLO Pin Current
Switch Current Limit vs
Temperature
Current Limit vs Duty Cycle
T
A
= 25°C unless otherwise noted.
3.3V
OUT
Maximum V
IN
for Full
Frequency (2MHz)
5V
OUT
Maximum V
IN
for Full
Frequency (2MHz)
FREQUENCY (MHz)
0 0.5
0
R
T
(kΩ)
50
250
200
300
3686A G09
100
150
1.5 2.521
TEMPERATURE (°C)
–50 0
1.90
FREQUENCY (MHz)
1.95
2.15
2.10
2.20
3686A G10
2.00
2.05
100 15050
R
T
= 15.4k
SS (mV)
5000
0
FREQUENCY (kHz)
200
1000
800
1200
3686A G11
400
600
1500 2000 25001000
SS (mV)
2000
0
FB (mV)
100
800
700
900
3686A G12
200
300
400
500
600
600 800 1000 1200400
EN/UVLO (V)
100
0
EN/UVLO (µA)
5
40
35
45
3686A G13
10
15
20
25
30
30 40 5020
TEMPERATURE (°C)
0–50
1.0
CURRENT LIMIT (A)
3686A G14
1.5
2.0
2.5
3.0
50 100 150
DUTY CYCLE (%)
250
0
CURRENT LIMIT (A)
3686A G15
0.5
1.0
1.5
2.5
2.0
3.0
50 75 100
DA VALLEY
SWITCH PEAK
LOAD CURRENT (mA)
5000
0
V
IN
(V)
3686A G16
5
10
15
25
20
1000 1500
MODE/SYNC > 0.8
MODE/SYNC < 0.4
V
OUT
= 3.3V
L = 6.8µH
f = 2MHz
LOAD CURRENT (mA)
5000
0
V
IN
(V)
3686A G17
5
10
15
35
25
30
20
1000
MODE/SYNC > 0.8
MODE/SYNC < 0.4
V
OUT
= 5V
L = 10µH
f = 2MHz
typicAl perForMAnce chArActeristics