Datasheet

LT3493
2
3493fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
(Note 1)
TOP VIEW
SHDN
V
IN
SW
FB
GND
BOOST
DCB PACKAGE
6-LEAD (2mm s 3mm) PLASTIC DFN
4
5
7
6
3
2
1
T
JMAX
= 125°C, θ
JA
= 64°C/W
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 12V, V
BOOST
= 17V, unless otherwise noted. (Note 2)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3493EDCB#PBF LT3493EDCB#TRPBF LCGG
6-Lead (2mm × 3mm) Plastic DFN
–40°C to 85°C
LT3493IDCB#PBF LT3493IDCB#TRPBF LCGH
6-Lead (2mm × 3mm) Plastic DFN
–40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3493EDCB LT3493EDCB#TR LCGG
6-Lead (2mm × 3mm) Plastic DFN
–40°C to 85°C
LT3493IDCB LT3493IDCB#TR LCGH
6-Lead (2mm × 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
Input Voltage (V
IN
) ....................................................40V
BOOST Pin Voltage ..................................................50V
BOOST Pin Above SW Pin .........................................25V
SHDN Pin ..................................................................40V
FB Voltage ...................................................................6V
Operating Temperature Range (Note 2)
LT3493E .............................................. –40°C to 85°C
LT3493I ............................................. –40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................... –65°C to 150°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Range 3.6 36 V
Undervoltage Lockout 3.1 3.4 3.6 V
Feedback Voltage
l
765 780 795 mV
FB Pin Bias Current V
FB
= Measured V
REF
+ 10mV (Note 4)
l
50 150 nA
Quiescent Current Not Switching 1.9 2.5 mA
Quiescent Current in Shutdown V
SHDN
= 0V 0.01 2 μA
Reference Line Regulation V
IN
= 5V to 36V 0.007 %/V
Switching Frequency V
FB
= 0.7V
V
FB
= 0V
685 750
36
815 kHz
kHz
Maximum Duty Cycle
T
A
= 25°C
l
88
91
95
95
%
%