LT3518EFE#PBF Linear Technology, LT3518EFE#PBF Datasheet - Page 3

• Manufacturer Part Number: LT3518EFE#PBF
• Description: IC LED DRIVR AUTOMOTIVE 16-TSSOP
• Manufacturer: Linear Technology
• Type: Automotiver

Specifications of LT3518EFE#PBF

• Constant Current: Yes
• Constant Voltage: Yes
• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive, Backlight
• Type - Secondary: White LED
• Frequency: 250kHz ~ 2.5MHz
• Voltage - Supply: 3 V ~ 30 V
• Voltage - Output: 7V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 2.8A
• Internal Switch(s): Yes
• Efficiency: 88%
• Led Driver Application: Display Backlighting, Automotive And Avionic Lighting
• No. Of Outputs: 1
• Output Current: 2.3A
• Output Voltage: 45V
• Input Voltage: 3V To 30V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 Amplifier 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
temperature range, otherwise specifications are at T
IN
C
C
T
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
SS = 0.5V, Out of Pin
R
SYNC = 300kHz Clock Signal, R
R
R
I
V
Current Out of Pin, V
PWM = 0, V
PWM = 0V
ISP Tied to ISN, V
–40°C ≤ T
125°C < T
–40°C ≤ T
125°C < T
R
V
Current Out of Pin, V
SW
CTRL
CTRL
CTRL
SYNC
SW
T
T
T
T
T
T
= 16.7k
= 4.03k
= 91.5k
= 91.5k (250kHz)
= 16.7k (1MHz)
= 4.03k (2.5MHz)
= 1.5A
= 45V, PWM = 0V
A
= 2V, V
= 2V, V
= 100mV, V
ISP
= 2V
= 25°C. (Note 2) V
< 45V
J
J
J
J
≤ 125°C
≤ 150°C
≤ 125°C
≤ 150°C
C
The
ISP
ISP
= 1V
C
= 0V
= 24V, V
= 0V, V
ISP
ISP
l
denotes the specifications 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
l
0.85
2.25
0.98
MIN
220
–20
1.5
2.3
1.2
1.2
30
96
95
94
85
6
1000
0.03
1.01
TYP
100
100
250
400
550
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
LT3518
MAX
1.15
1.04
0.45
0.40
0.45
0.40
103
270
100
100
300
100
120
2.7
0.4
3.5
10
12
20
3
1
2
UNITS
3518fd
3
MHz
MHz
%/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
V
V