LTM8040 Просмотр технического описания (PDF) - Linear Technology
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LTM8040 Datasheet PDF : 16 Pages
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LTM8040
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN ............................................................................36V
BIAS ..........................................................................25V
BIAS + VIN.................................................................51V
LEDA ......................................................................... 15V
PWM .........................................................................10V
ADJ .............................................................................6V
SHDN ........................................................................36V
SHDN Above VIN .........................................................6V
BIAS Current ...............................................................1A
Internal Operating Temperature (Note 2).... –40 to 125°C
Storage Temperature Range....................... –45 to 125°C
PIN CONFIGURATION
LEDA
BANK 1
GND
BANK 2
PWM
BIAS
SHDN
ADJ
RT
GND
VIN LPWR
BANK 3
TJMAX = 125°C, θJA = 250°C/W, WEIGHT = 1.083g
60 Lead (15mm × 9mm × 2.82mm)
θJA DERIVED FROM 6.35cm × 6.35cm 4 LAYER PCB
ORDER INFORMATION
LEAD FREE FINISH
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE (NOTE 3)
LTM8040EV#PBF
LTM8040V
60-Lead 15mm × 9mm LGA Package
0°C to 125°C
LTM8040IV#PBF
LTM8040V
60-Lead 15mm × 9mm LGA Package
–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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = LPWR, VOUT = 4V, ADJ open, RT open, VPWM = 5V,
unless otherwise noted (Note 3).
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
Minimum Input Voltage
l
3.5
4
V
Input Quiescent Current
Shutdown Current
Not Switching
SHDN =0.3V, BIAS = 0V, LEDA = 0V
2.6
4
mA
0.01
2
μA
LEDA Current
ADJ open
RADJ = 5.11k
0.98
1
1.02
A
l 0.965
1.035
A
0.49
0.5
0.51
A
l 0.481
0.525
A
ADJ Bias Current
ADJ = 0V, Current flows out of pin
24.5
μA
ADJ Pull-up Resistor
5
5.11
5.22
kΩ
Switching Frequency
SHDN Threshold
PWM Threshold
RT open
VIH
VIL
VIH
VIL
470
500
530
kHz
2.60
V
1
V
1.2
V
0.4
V
8040p
2
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