lt3517 Linear Technology Corporation, lt3517 Datasheet - Page 3

• Manufacturer Part Number: lt3517
• Description: Full-featured Led Driver With 1.5a Switch Current
• Manufacturer: Linear Technology Corporation

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