Datasheet

LT3988
2
3988f
pin conFiguraTionabsoluTe MaxiMuM raTings
V
IN
(Notes 7, 8) .......................................... –0.3V to 80V
BOOST ......................................................................80V
EN/UVLO (Note 7) .....................................................80V
BOOST above SW .....................................................30V
EN/UVLO above V
IN1
................................................... 6V
RT, SYNC ....................................................................6V
TRACK/SS, FB ............................................................5V
BD .............................................................................20V
Operating Junction Temperature Range (Note 2)
LT3988E ............................................ –40°C to 125°C
LT3988I ............................................. –40°C to 125°C
LT3988H ............................................ –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................... 300°C
(Note 1)
1
2
3
4
5
6
7
8
DA1
SW1
BOOST1
BD
EN/UVLO
BOOST2
SW2
DA2
17
GND
16
15
14
13
12
11
10
9
V
IN1
TRACK/SS1
FB1
RT
SYNC
FB2
TRACK/SS2
V
IN2
TOP VIEW
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE*
LT3988EMSE#PBF LT3988EMSE#TRPBF 3988 16-Lead Plastic MSOP –40°C to 125°C
LT3988IMSE#PBF LT3988IMSE#TRPBF 3988 16-Lead Plastic MSOP –40°C to 125°C
LT3988HMSE#PBF LT3988HMSE#TRPBF 3988 16-Lead Plastic MSOP –40°C to 150°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/
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN1/2
= 12V, unless otherwise noted. (Notes 2, 5, 6)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN1
Undervoltage Lockout (Note 3) V
IN1
Rising
l
3.9 4.1 V
V
IN1
Undervoltage Lockout Hysteresis 260 mV
V
IN1
Overvoltage Lockout (Note 3) V
IN1
Rising
l
60 64 66 V
V
IN1
Overvoltage Lockout Hysteresis 2.1 V
V
IN2
Undervoltage Lockout (Note 3) V
IN2
Rising, V
IN1
= 4.1V
l
2 2.6 3.1 V
V
IN2
Undervoltage Lockout Hysteresis 135 mV
EN/UVLO Input Current V
EN/UVLO
= 1.2V –0.5 0.5 µA
EN/UVLO Enable Threshold 300 500 mV
EN/UVLO Undervoltage Threshold V
EN/UVLO
= Rising
l
1.1 1.2 1.3 V
EN/UVLO Undervoltage Threshold Hysteresis 120 mV