Datasheet

LT3592
4
3592fc
TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency (2 Red LEDS,
L = 10μH, 900kHz)
Effi ciency (1 Red LED,
L = 6.8μH, 900kHz)
Effi ciency (2 Red LEDs,
L = 22μH, 400kHz)
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 22μH,
f = 400kHz (LED Loads)
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 6.8μH,
f = 900kHz (LED Loads)
Switch Voltage Drop
vs Switch Current
Switch Voltage Drop at 500mA
vs Temperature
(T
A
= 25°C, unless otherwise noted)
INPUT VOLTAGE (V)
4
EFFICIENCY (%)
100
95
90
60
50
75
70
65
80
85
55
45
40
2012 24
3592 G01
28168
BRIGHT (500mA)
INPUT VOLTAGE (V)
4
EFFICIENCY (%)
100
95
90
60
50
75
70
65
80
85
55
45
40
2012 24
3592 G02
28168
BRIGHT (500mA)
INPUT VOLTAGE (V)
4
EFFICIENCY (%)
100
95
90
60
75
70
65
80
85
55
50
2012 24
3592 G03
28168
BRIGHT (500mA)
INPUT VOLTAGE (V)
2
OUTPUT VOLTAGE (V)
12
11
10
4
7
6
5
8
9
3
2
8
3592 G05
121046
INPUT VOLTAGE (V)
2
OUTPUT VOLTAGE (V)
12
11
10
4
7
6
5
8
9
3
2
8
3592 G06
121046
SWITCH CURRENT (mA)
0
V
IN
– V
SW
(mV)
500
450
400
100
250
200
150
300
350
50
0
600
3592 G08
800700100 200 300 400 500
TEMPERATURE (°C)
–50
V
IN
– V
SW
(mV)
400
375
300
350
325
275
250
100
3592 G09
150050
Effi ciency (2 Red LEDs,
L = 4.7μH, 2.2MHz)
Minimum V
IN
for 500mA Output
Current vs V
OUT
, L = 4.7μH,
f = 2.2MHz (LED Loads)
INPUT VOLTAGE (V)
4
EFFICIENCY (%)
100
95
90
60
75
70
65
80
85
55
50
2012 24
3592 G04
28168
BRIGHT (500mA)
INPUT VOLTAGE (V)
2
OUTPUT VOLTAGE (V)
12
11
10
4
7
6
5
8
9
3
2
8
3592 G07
1610 12 1446