Datasheet
LT3800
2
3800fc
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Supply Voltages
Input Supply Pin (V
IN
) ............................... –0.3V to 65V
Boosted Supply Pin (BOOST) .................... –0.3V to 80V
Boosted Supply Voltage (BOOST – SW) ... –0.3V to 24V
Boosted Supply Reference Pin (SW) ............ –2V to 65V
Local Supply Pin (V
CC
) .............................. –0.3V to 24V
Input Voltages
SENSE
+
, SENSE
–
...................................... –0.3V to 40V
SENSE
+
– SENSE
–
......................................... –1V to 1V
BURST_EN Pin .......................................... –0.3V to 24V
Other Inputs (SHDN, C
SS
, V
FB
, V
C
) .......... –0.3V to 5.0V
Input Currents
SHDN, C
SS
............................................... –1mA to 1mA
Maximum Temperatures
Operating Junction Temperature Range (Note 2)
LT3800E (Note 3) .............................. –40°C to 125°C
LT3800I ............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................. 300°C
(Note 1)
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
NC
SHDN
C
SS
BURST_EN
V
FB
V
C
SENSE
–
BOOST
TG
SW
NC
V
CC
BG
PGND
SENSE
+
17
T
JMAX
= 125°C, θ
JA
= 40°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS SGND
MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3800EFE#PBF LT3800EFE#TRPBF 3800EFE 16-Lead Plastic TSSOP –40°C to 125°C
LT3800IFE#PBF LT3800IFE#TRPBF 3800IFE 16-Lead Plastic TSSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage Range (Note 4)
Minimum Start Voltage
UVLO Threshold (Falling)
UVLO Hysteresis
●
●
●
4
7.5
3.65 3.80
670
60
3.95
V
V
V
mV
I
VIN
V
IN
Supply Current
V
IN
Burst Mode Current
V
IN
Shutdown Current
V
CC
> 9V
V
BURST_EN
= 0V, V
FB
= 1.35V
V
SHDN
= 0V
●
20
20
815
µA
µA
µA
V
BOOST
Operating Voltage
Operating Voltage Range (Note 5)
UVLO Threshold (Rising)
UVLO Hysteresis
V
BOOST
– V
SW
V
BOOST
– V
SW
V
BOOST
– V
SW
●
●
5
0.4
75
20
V
V
V
V
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
= 20V, V
CC
= BOOST = BURST_EN = 10V, SHDN = 2V,
SENSE
–
= SENSE
+
= 10V, SGND = PGND = SW = 0V, CTG = CBG = 3300pF, unless otherwise noted.