LT3517EUF(RevA) 데이터 시트보기 (PDF) - Linear Technology
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LT3517EUF Datasheet PDF : 20 Pages
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LT3517
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2) VIN = 5V, SHDN = 5V, PWM = 5V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum VIN Operating Voltage
Maximum VIN Operating Voltage
Current Sense Voltage (VISP – VISN)
10% Scale Current Sense Voltage (VISP – VISN)
Current Sense Voltage Line Regulation
VIN Supply Current
Continuous Operation (Note 3)
VCTRL = 2V, VISP = 24V, VC = 1V
VCTRL = 2V, VISP = 0V, VC = 1V
VCTRL = 100mV, VISP = 24V, VC = 1V
2V < VISP < 45V
PWM > 1.5V, VC = 0V
PWM = 0V
SHDN = 0V
3
V
30
V
● 96
100 103
mV
100
mV
9
mV
0.03
%/V
6
10
mA
4.5
mA
0.1
1
μA
Switching Frequency
RT Voltage
RT = 16.7k
RT = 4.03k
RT = 91.5k
● 0.85
1.0
1.15
MHz
2.25 2.5
2.7
MHz
220
250
270
kHz
1
V
Soft-Start Pin Current
SS = 0.5V, Out of Pin
6
9
12
μA
SYNC Pull-Down Current (Into the Pin)
SYNC Input Low
VSYNC = 2V
60
μA
0.4
V
SYNC Input High
1.5
V
Maximum Duty Cycle
Switch Current Limit
RT = 91.5k (250kHz)
SYNC = 300kHz Clock Signal, RT = 91.5k
RT = 16.7k (1MHz)
RT = 4.03k (2.5MHz)
95
97
%
94
96
%
● 85
90
%
74
%
1.5
1.9
2.3
A
Switch VCESAT
ISW = 1A
300
mV
Switch Leakage Current
CTRL Input Bias Current
Error Amplifier Transconductance
VSW = 45V, PWM = 0V
Current Out of Pin, VCTRL = 0.1V
2
μA
20
100
nA
550
μS
VC Output Impedance
VC Idle Input Bias Current
PWM = 0V, VC = 1V
1000
kΩ
–20
0
20
nA
FB Pin Input Bias Current
FB Pin Threshold
Current Out of Pin, VFB = 0.5V
20
100
nA
● 0.98 1.01 1.04
V
ISP , ISN Idle Input Bias Current
PWM = 0V
300
nA
ISP , ISN Full-Scale Input Bias Current
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Bias Current
ISP Tied to ISN, VISP = 24V, VCTRL = 2V
20
μA
1.5
V
0.4
V
60
100
μA
PWM Input High Voltage
1.5
V
PWM Input Low Voltage
0.4
V
PWM Pin Bias Current
60
120
μA
3517fa
3
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