Datasheet

LTC3499/LTC3499B
2
3499fc
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
to GND ..................................................... – 7V to 7V
V
OUT
to GND .............................................. – 0.3V to 7V
SW to V
OUT
................................................... – 7V to 1V
SW to GND
DC ............................................................... –7V to 7V
Pulsed < 100ns ........................................... –7V to 8V
SHDN to GND
................................................. – 7V to 7V
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3499EDD#PBF LTC3499EDD#TRPBF LBRB
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC3499BEDD#PBF LTC3499BEDD#TRPBF LCDZ
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC3499EMS8#PBF LTC3499EMS8#TRPBF LTBRC 8-Lead Plastic MSOP –40°C to 85°C
LTC3499BEMS8#PBF LTC3499BEMS8#TRPBF LTCFB 8-Lead Plastic MSOP –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TOP VIEW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
9
4
3
2
1SHDN
V
IN
SW
GND
VC
FB
V
OUT
SS
T
JMAX
= 125°C, θ
JA
= 45°C
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
VC
FB
V
OUT
SS
SHDN
V
IN
SW
GND
1
2
3
4
8
7
6
5
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 160°C/W
FB, SS to GND ............................................. – 0.3V to 7V
Operating Temperature Range
(Notes 3, 4) ......................................... –40°C to 85°C
Storage Temperature Range
................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
MSOP .............................................................. 300°C
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply
V
IN
Minimum Start-Up Voltage
l
1.6 1.8 V
V
OUT
Output Voltage Adjust Range
l
2 6 V
V
FB
FB Voltage
l
1.195 1.220 1.245 V
The l denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
IN
= 2.4V, V
OUT
= 5V, SHDN = 2.4V, T
A
= T
J
unless otherwise noted. (Note 3)