LT3596
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 24V, BOOST = 30V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V,
CTRL1-3 = CTRLM = TSET = 2V, V OUT = 24V, SYNC = 0V unless otherwise specified. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V IN Operating Voltage
Quiescent Current from V IN
Minimum BIAS Voltage
Quiescent Current from BIAS
EN Threshold
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching, Current Out of Pin
l
6
0.4
1.3
3
3
1.4
70
0.7
55
2
4
5
3.1
2
3
150
V
μA
mA
mA
V
μA
mA
μA
V
UVLO Threshold (Falling)
1.47
1.51
1.53
V
EN/UVLO Pin Current (Hysteresis)
FB Regulation Voltage
FB Pin Bias Current
Maximum Duty Cycle
Switch Saturation Voltage
Switch Current Limit
DA Pin Current to Stop OSC
EN/UVLO = 1.6V
EN/UVLO = 1.4V
FB = 6V
R T = 220k (200kHz)
R T = 33.2k (1MHz)
I SW = 300mA
4.25
1.15
90
80
0.8
500
10
5.1
1.21
99
90
330
1.0
650
5.75
1.25
200
1.25
750
nA
μA
V
nA
%
%
mV
A
mA
Switch Leakage
BOOST Pin Current
V SW = 0V
I SW = 100mA
3
700
nA
mA
Switching Frequency
R T = 220k
R T = 33.2k
170
900
200
1000
230
1100
kHz
kHz
SYNC Input Low
SYNC Input High
1.6
0.4
V
V
SYNC Frequency Range
SYNC Pin Bias Current
Soft-Start Time
R T = 220k
R T = 47k
V SYNC = 3.3V
(Note 4)
240
2.2
1000
200
kHz
kHz
nA
ms
V REF Voltage
I VREF = 0μA
l
1.96
2.0
2.04
V
Maximum V REF Current
200
μA
I SET1-3 Pin Voltage
TSET Voltage for LED Current Derating
TSET Pin Leakage Current
R ISET1-3 = 20k
V TSET = 1V
1.0
540
200
V
mV
nA
I LED1-3 LED Current
LED String Current Matching
R ISET1-3 = 20k
R ISET1-3 = 20k
l
l
98
97
100
100
±0.35
±0.35
102
103
±1.5
±2
mA
mA
%
%
LED Pin Voltage
LED1-3 Open Detection Threshold
LED1-3 Short Protection Threshold (from GND)
Adaptive V OUT Loop Enabled
10
1.07
0.29
15
V
V
V
LED1-3 Short Protection Threshold (from V OUT )
LED1-3 Pin Leakage Current
V OUT = 6V, V OUT > V LED1-3
V LED1-3 = 42V, PWM1-3 = 0V
1
1.2
1.6
200
V
nA
3596fa
 
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