Datasheet

LT1912
2
1912fa
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
V
IN
, RUN/SS Voltage ................................................. 36V
BOOST Pin Voltage
...................................................56V
BOOST Pin Above SW Pin
......................................... 30V
FB, RT, V
C
Voltage ....................................................... 5V
BD, SYNC Voltage
.....................................................30V
(Note 1)
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, V
BOOST
= 15V, V
BD
= 3.3V unless otherwise
noted. (Note 2)
Operating Junction Temperature Range (Note 2)
LT1912E
............................................ –40°C to 125°C
Storage Temperature Range
.................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSE Only
..........................................................300°C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1912EDD#PBF
LT1912EMSE#PBF
LT1912EDD#TRPBF
LT1912EMSE#TRPBF
LDJT
LTDJS
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
–40°C to 125°C
–40°C to 125°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
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
11
GND
2
1
R
T
V
C
FB
N/C
SYNC
BD
BOOST
SW
V
IN
RUN/SS
JA
= 45°C/W,
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
BD
BOOST
SW
V
IN
RUN/SS
10
9
8
7
6
R
T
V
C
FB
N/C
SYNC
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
11
GND
JA
= 45°C/W,
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
l
3 3.6 V
Quiescent Current from V
IN
V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
l
0.01
450
1.3
0.5
600
1.7
µA
µA
mA
Quiescent Current from BD V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
l
0.01
0.9
1
0.5
1.3
5
µA
mA
µA
Minimum Bias Voltage (BD Pin) 2.7 3 V