LT3518 LINER [Linear Technology], LT3518 Datasheet - Page 3

• Manufacturer Part Number: LT3518
• Description: Full-Featured LED Driver with 2.3A Switch Current
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
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
TGEN Input High Voltage
TGEN Input Low Voltage
TGEN Pin Bias Current
V
temperature range, otherwise specifi cations are at T
IN
C
C
REF
T
Voltage
Output Impedance
Idle Input Bias Current
Supply Current
Pin Voltage
CESAT
IN
IN
Operating Voltage
Operating Voltage
ISP
– V
ISN
)
ISP
– V
ISN
)
CONDITIONS
Continuous Operation (Note 3)
V
V
V
PWM > 1.5V, V
PWM = 0V
SHDN = 0V
R
R
SYNC = 300kHz Clock Signal, R
R
R
I
I
2V < V
R
SS = 0.5V, Out of Pin
V
R
V
Current Out of Pin, V
PWM = 0, V
Current Out of Pin, V
PWM = 0V
ISP Tied to ISN, V
TGEN = 5V
SW
REF
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)
= 1.5A
= –100μA
= 45V, PWM = 0V
A
= 2V, V
= 2V, V
= 100mV, V
ISP
= 2V
= 25°C. (Note 2) V
< 45V
C
The
ISP
ISP
= 1V
C
= 0V
= 24V, V
= 0V, V
ISP
ISP
l
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
= 1V
= 5V, SHDN = 5V, PWM = 5V unless otherwise noted.
T
= 91.5k
= 2V
l
l
l
l
l
0.85
2.25
0.98
1.96
MIN
220
–20
1.5
2.3
1.5
1.5
1.5
30
96
95
94
85
6
1000
0.03
1.01
TYP
100
100
250
400
550
100
4.5
0.1
1.0
2.5
2.8
60
97
96
90
74
20
20
20
60
60
9
6
1
9
0
2
LT3518
MAX
1.15
1.04
2.04
103
270
100
100
300
100
120
200
2.7
0.4
3.5
0.4
0.4
0.4
10
12
20
3
1
2
UNITS
3518fb
3
MHz
MHz
%/V
kHz
mV
mV
mV
mA
mA
mV
kΩ
μA
μA
μA
μA
nA
μS
nA
nA
nA
μA
μA
μA
μA
%
%
%
%
V
V
V
V
V
A
V
V
V
V
V
V
V
V