Datasheet
LT3486
5
3486fe
TYPICAL PERFORMANCE CHARACTERISTICS
Input Current with Output 1 and
Output 2 Open Circuit
R
T
vs Oscillator Frequency Oscillator Frequency vs V
IN
Oscillator Frequency
vs Temperature
Quiescent Current vs V
IN
PWM Pin Input Bias Current
Switch Current Limit
vs Duty Cycle
REF Voltage vs Temperature
V
IN
(V)
2
INPUT CURRENT (mA)
10
15
18
3486 G08
5
0
6
10
12
22 24
20
14
4
8
20
16
T
A
= 25°C
R
T
= 63.4k
OSCILLATOR FREQUENCY (kHz)
R
T
(kΩ)
1000
3486 G09
10
100
500 2500200015001000
0
V
IN
(V)
2
OSCILLATOR FREQUENCY (kHz)
1000
1050
18
3486 G10
950
900
6
10
12
22 24
1100
14
4
8
20
16
R
T
= 53.6k
TEMPERATURE (°C)
100
10000
1000
3486 G11
OSCILLATOR FREQUENCY (kHz)
–50
125
–25 0 25 50 75 100
R
T
= 22.1k
R
T
= 53.6k
R
T
= 309k
V
IN
(V)
0
0
QUIESCENT CURRENT (mA)
2
4
6
8
12
4
8 12 16
3486 G12
202
6
10 14 18 22 24
10
SHDN = 3V
CTRL1 = CTRL2 = 3V
UVLO
PWM PIN VOLTAGE (V)
0
PWM PIN CURRENT (µA)
0
0.5
8
3486 G13
–0.5
–1.0
2
4
6
10
1.0
V
IN
= 3.6V
PWM 1
PWM 2
DUTY CYCLE (%)
20
800
CURRENT LIMIT (mA)
900
1000
1100
1200
40 60
80
100
3486 G14
1300
1400
30 50
70
90
V
IN
= 3.6V
TEMPERATURE (°C)
–50 –25
1.20
REF VOLTAGE (V)
1.24
1.30
0
50
75
3486 G15
1.22
1.28
1.26
25
100
125
V
IN
= 3.6V
REF Voltage Load Regulation
REF LOAD CURRENT (µA)
0
REF VOLTAGE (V)
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
160
3468 G16
40 80 120 20014020 60 100 180
V
IN
= 3.6V
T
A
= 25°C
T
A
= –50°C
T
A
= 25°C
T
A
= 85°C
T
A
= 25°C unless otherwise specified.