Datasheet

LT3845A
2
3845afa
ORDER INFORMATION
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V
IN
) ........................................65V
Boosted Supply Voltage (BOOST)
.............................80V
Switch Voltage (SW) (Note 8)
....................... 65V to –2V
Differential Boost Voltage
(BOOST to SW) .....................................................24V
Bias Supply Voltage (V
CC
) .........................................24V
SENSE
+
and SENSE
–
Voltages ..................................40V
Differential Sense Voltage
(SENSE
+
to SENSE
–
) .................................... 1V to –1V
BURST_EN Voltage
...................................................24V
SYNC, V
C
, V
FB
, C
SS
, and SHDN Voltages ....................5V
SHDN Pin Currents
..................................................1mA
Operating Junction Temperature Range (Note 2)
LT3845AE (Note 3) ............................ –40°C to 125°C
LT3845AI .......................................... –40°C to 125°C
LT3845AMP ....................................... –55°C to 125°C
Storage Temperature.............................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
...................300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3845AEFE#PBF LT3845AEFE#TRPBF 3845AFE 16-Lead Plastic TSSOP –40°C to 125°C
LT3845AIFE#PBF LT3845AIFE#TRPBF 3845AFE 16-Lead Plastic TSSOP –40°C to 125°C
LT3845AMPFE#PBF LT3845AMPFE#TRPBF 3845AFE 16-Lead Plastic TSSOP –55°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/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
17
T
JMAX
= 125°C, q
JA
= 40°C/W, q
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS SGND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION