LT3597(RevA) データシートの表示（PDF） - Linear Technology
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LT3597 Datasheet PDF : 24 Pages
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LT3597
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 29V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V,
CTRL1-3 = CTRLM = TSET = 2.0V, VOUT1-3 = 24V, SYNC = 0V, unless otherwise specified. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN Operating Voltage
Quiescent Current from VIN
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching
l
6
55
V
2
µA
2.1
4
mA
4
6
mA
Minimum BIAS Voltage
3
3.1
V
Quiescent Current from BIAS
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching, Current Out of Pin
2
µA
2
3
mA
60
150
µA
EN Threshold (Falling)
0.4
0.7
V
UVLO Threshold (Falling)
1.47 1.51 1.53
V
EN/UVLO Pin Current (Hysteresis)
EN/UVLO = 1.6V
EN/UVLO = 1.4V
10
nA
4
5.1
6
µA
FB1-3 Regulation Voltage
1.15 1.22 1.25
V
FB1-3 Pin Bias Current
FB = 6V
200
nA
Maximum Duty Cycle
Switch Saturation Voltage
Switch Current Limit
RT = 220k (200kHz)
RT = 33.2k (1MHz)
ISW1-3 = 100mA
90
95
%
78
85
%
265
mV
400
510
700
mA
DA Pin Current to Stop OSC
225
280
350
mA
Switch Leakage
BST1-3 Pin Current
Switching Frequency
SYNC Input Low
VSW1-3 = 0V
ISW1-3 = 100mA
RT = 220k
RT = 33.2k
700
nA
2
mA
170
200
230
kHz
900 1000 1100
kHz
0.4
V
SYNC Input High
1.6
V
SYNC Frequency Range
SYNC Pin Bias Current
Soft-Start Time
RT = 220k
RT = 47k
VSYNC = 3.3V
(Note 4)
240
kHz
1000
kHz
200
nA
2.5
ms
VREF Voltage
Maximum VREF Current
ISET1-3 Pin Voltage
TSET Voltage for LED Current Derating
TSET Pin Leakage Current
ILED1-3 LED Current
IVREF = 0µA
RISET1-3 = 20k, VCTRL = VCTRLM = TSET = 1.5V
VTSET = 1.0V
RISET1-3 = 20k
l 1.96
2.0
2.04
V
200
µA
1.0
V
540
mV
200
nA
98
100
102
mA
l 97
100
103
mA
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3
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