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LTM8040
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
V IN ............................................................................36V
BIAS ..........................................................................25V
BIAS + V IN .................................................................51V
LEDA, LPWR .............................................................15V
PWM .........................................................................10V
ADJ .............................................................................6V
RT ...............................................................................3V
SHDN ........................................................................36V
SHDN Above V IN .........................................................6V
LEDA
BANK 1
GND
BANK 2
V IN
BANK 3
LPWR
PWM
BIAS
SHDN
ADJ
RT
GND
Internal Operating Temperature (Note 2)... –40°C to 125°C
Max Solder Temperature ....................................... 245°C
ORDER INFORMATION
T JMAX = 125°C, θ JA = 13°C/W, θ JC = 4.4°C/W, WEIGHT = 1.73g
66 LEAD (15mm × 9mm × 4.32mm)
θ JA DERIVED FROM 6.35cm × 6.35cm 4 LAYER PCB
LEAD FREE FINISH
LTM8040EV#PBF
LTM8040IV#PBF
TRAY
LTM8040EV#PBF
LTM8040IV#PBF
PART MARKING*
LTM8040V
LTM8040V
PACKAGE DESCRIPTION
66-Lead 15mm × 9mm × 4.32mm LGA Package
66-Lead 15mm × 9mm × 4.32mm LGA Package
TEMPERATURE RANGE (NOTE 3)
0°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges. *The temperature grade is identi?ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based ?nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 12V, SHDN = 5V, V PWM = 5V, unless otherwise noted (Note 3).
PARAMETER
Minimum Input Voltage
Input Quiescent Current
SHDN Current
CONDITIONS
Not Switching
SHDN = 0.3V
SHDN = 2.65V
l
MIN
TYP
3.5
2.6
0.01
10.3
MAX
4
4
2
UNITS
V
mA
μA
μA
LEDA Current
ADJ Open
R ADJ = 5.11k
l
l
0.98
0.965
0.49
0.481
1
0.5
1.02
1.035
0.51
0.525
A
A
A
A
ADJ Bias Current
ADJ = 0V, Current Flows Out of Pin
245
μA
ADJ Pull-up Resistor
5
5.11
5.22
kΩ
Switching Frequency
RT Open
470
500
530
kHz
SHDN Threshold
2.65
V
PWM Threshold
V IH
V IL
1.2
0.4
V
V
8040fa
2
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