LT3592
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency (2 Red LEDS,
L = 10μH, 900kHz)
100
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
45
40
4
8
16
12
20
INPUT VOLTAGE (V)
24
28
3592 G01
(T
A
= 25°C, unless otherwise noted)
Efficiency (2 Red LEDs,
L = 22μH, 400kHz)
100
95
90
EFFICIENCY (%)
BRIGHT (500mA)
Efficiency (1 Red LED,
L = 6.8μH, 900kHz)
100
95
90
BRIGHT (500mA)
EFFICIENCY (%)
85
80
75
70
65
60
55
50
45
40
4
8
16
12
20
INPUT VOLTAGE (V)
24
28
3592 G02
BRIGHT (500mA)
85
80
75
70
65
60
55
50
4
8
16
12
20
INPUT VOLTAGE (V)
24
28
3592 G03
Efficiency (2 Red LEDs,
L = 4.7μH, 2.2MHz)
100
95
90
EFFICIENCY (%)
85
80
75
70
65
60
55
50
4
8
16
12
20
INPUT VOLTAGE (V)
24
28
3592 G04
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 22μH,
f = 400kHz (LED Loads)
12
11
10
OUTPUT VOLTAGE (V)
12
11
10
OUTPUT VOLTAGE (V)
9
8
7
6
5
4
3
2
2
4
6
8
INPUT VOLTAGE (V)
10
12
3592 G05
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 6.8μH,
f = 900kHz (LED Loads)
BRIGHT (500mA)
9
8
7
6
5
4
3
2
2
4
6
8
INPUT VOLTAGE (V)
10
12
3592 G06
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 22μH,
f = 400kHz (LED Loads)
12
11
10
OUTPUT VOLTAGE (V)
V
IN
– V
SW
(mV)
9
8
7
6
5
4
3
2
2
4
6
10
12
8
INPUT VOLTAGE (V)
14
16
3592 G07
Switch Voltage Drop
vs Switch Current
500
450
400
350
300
250
200
150
100
50
0
0
100 200 300 400 500 600 700 800
SWITCH CURRENT (mA)
3592 G08
Switch Voltage Drop at 500mA
vs Temperature
400
375
350
325
300
275
250
–50
V
IN
– V
SW
(mV)
0
100
50
TEMPERATURE (°C)
150
3592 G09
3592fa
4
LINER [ LINEAR TECHNOLOGY ]
