(Note 2).................................................. –40°C to 125°C
Max Junction Temperature.................................... 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
SHDN
PWM3
PWM2
PWM1
V
REF
CTRL3
CTRL2
CTRL1
FADJ
1
2
3
4
5
6
7
8
9
29
28 V
IN
PWM2
27 TG3
26 LED3
25 CAP3
24 SW3
23 SW2
22 CAP2
21 LED2
20 TG2
19 SW1
18 CAP1
17 LED1
16 TG1
15 OVP1
PWM1 1
V
REF
2
CTRL3 3
CTRL2 4
CTRL1 5
FADJ 6
VC3 7
VC2 8
9 10 11 12 13 14
VC1
OVP3
OVP2
OVP1
LED1
TG1
29
TOP VIEW
PWM3
SHDN
LED3
22 CAP3
21 SW3
20 SW2
19 CAP2
18 LED2
17 TG2
16 SW1
15 CAP1
TG3
V
IN
28 27 26 25 24 23
VC3 10
VC2 11
VC1 12
OVP3 13
OVP2 14
FE PACKAGE
28-LEAD PLASTIC TSSOP
T
JMAX
= 125°C,
θ
JA
= 25°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
UFD PACKAGE
28-LEAD (4mm 5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W,
θ
JC
= 2.7°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3496EFE#PBF
LT3496IFE#PBF
LT3496EUFD#PBF
LT3496IUFD#PBF
TAPE AND REEL
LT3496EFE#TRPBF
LT3496IFE#TRPBF
LT3496EUFD#TRPBF
LT3496IUFD#TRPBF
PART MARKING*
3496FE
3496FE
3496
3496
PACKAGE DESCRIPTION
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
*For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
3496fe
2
LT3496
ELECTRICAL CHARACTERISTICS
PARAMETER
V
IN
Operation Voltage
V
IN
Undervoltage Lockout
Full-Scale LED Current Sense Voltage
One-Tenth Scale LED Current Sense Voltage
CAPn/LEDn Operating Voltage
V
REF
Output Voltage
V
REF
Line Regulation
Quiescent Current in Shutdown
Quiescent Current Idle
Quiescent Current Active (Not Switching)
Switching Frequency
I
REF
= 200μA, Current Out of Pin
3V ≤ V
IN
≤ 40V, I
REF
= 10μA
SHDN
= 0V
PWM1-PWM3 = 0V
VC1-VC3 = 0V
FADJ = 1.5V
FADJ = 0.5V
FADJ = 0.1V
FADJ = 1.5V (2.1MHz)
FADJ = 0.5V (1.3MHz)
FADJ = 0.1V (330kHz)
Current Out of Pin, CTRL1-3 = 0.1V
Current Out of Pin, FADJ = 0.1V
Current Out of Pin, OVP1-3 = 0.1V
0.95
PWM1-3 = 0V
CAP1-3 = 24V
CAP1-3 = 24V
(Note 3)
I
SW
= 500mA (Note 3)
SHDN
= 0V, SW = 5V
180
PWM1-3 = 0V
SHDN
= 0V
750
–20
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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