Datasheet

LTC3108-1
2
31081fb
For more information www.linear.com/LTC3108-1
absoluTe MaxiMuM raTings
SW Voltage ..................................................–0.3V to 2V
C1 Voltage .................................................... –0.3V to 6V
C2 Voltage (Note 5) ......................................... –8V to 8V
V
OUT2
, V
OUT2_EN
........................................... –0.3V to 6V
VAUX ....................................................15mA into VAUX
(Note 1)
12
11
10
9
8
7
13
GND
1
2
3
4
5
6
SW
C2
C1
V
OUT2_EN
VS1
VS2
VAUX
VSTORE
V
OUT
V
OUT2
VLDO
PGD
TOP VIEW
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB (NOTE 4)
GN PACKAGE
16-LEAD PLASTIC SSOP NARROW
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GND
VAUX
VSTORE
V
OUT
V
OUT2
VLDO
PGD
GND
GND
SW
C2
C1
V
OUT2_EN
VS1
VS2
GND
T
JMAX
= 125°C, θ
JA
= 110°C/W
pin conFiguraTion
elecTrical characTerisTics
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Voltage Using 1:100 Transformer Turns Ratio, VAUX = 0V 20 50 mV
No-Load Input Current Using 1:100 Transformer Turns Ratio; V
IN
= 20mV,
V
OUT2_EN
= 0V; All Outputs Charged and in Regulation
3 mA
Input Voltage Range Using 1:100 Transformer Turns Ratio
l
V
STARTUP
500 mV
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for T
A
= 25°C (Note 2). VAUX = 5V, unless otherwise noted.
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3108EDE-1#PBF LTC3108EDE-1#TRPBF 31081 12-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
LTC3108IDE-1#PBF LTC3108IDE-1#TRPBF 31081 12-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
LTC3108EGN-1#PBF LTC3108EGN-1#TRPBF 31081 16-Lead Plastic SSOP –40°C to 125°C
LTC3108IGN-1#PBF LTC3108IGN-1#TRPBF 31081 16-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specified for other fixed output voltages or wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
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/
VS1, VS2, VAUX, V
OUT
, PGD ........................–0.3V to 6V
VLDO, VSTORE ............................................–0.3V to 6V
Operating Junction Temperature Range
(Note 2) ................................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C