Datasheet

LT3512
2
3512fb
pin conFiguraTionabsoluTe MaxiMuM raTings
SW (Note 4) ............................................................150V
V
IN
, EN/UVLO, R
FB
..................................................100V
V
IN
to R
FB
.................................................................. ±6V
BIAS ................................................ Lesser of 20V or V
IN
R
REF
,T
C
, VC .................................................................6V
Operating Junction Temperature Range (Note 2)
LT3512E, LT3512I .............................. –40°C to 125°C
LT3512H ............................................–40°C to 150°C
LT3512MP .......................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
1
3
5
6
7
8
EN/UVLO
V
IN
GND
BIAS
NC
GND
16
14
12
11
10
9
SW
R
FB
R
REF
T
C
VC
GND
TOP VIEW
MS PACKAGE
16(12)-LEAD PLASTIC MSOP
θ
JA
= 90°C/W
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3512EMS#PBF LT3512EMS#TRPBF 3512 16-Lead Plastic MSOP –40°C to 125°C
LT3512IMS#PBF LT3512IMS#TRPBF 3512 16-Lead Plastic MSOP –40°C to 125°C
LT3512HMS#PBF LT3512HMS#TRPBF 3512 16-Lead Plastic MSOP –40°C to 150°C
LT3512MPMS#PBF LT3512MPMS#TRPBF 3512 16-Lead Plastic MSOP –55°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.
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
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range
V
IN
= BIAS
l
6
4.5
100
15
V
V
Quiescent Current Not Switching
V
EN/UVLO
= 0.2V
3.5
0
4.5 mA
μA
EN/UVLO Pin Threshold EN/UVLO Pin Voltage Rising
l
1.15 1.21 1.27 V
EN/UVLO Pin Current V
EN/UVLO
=1.1V
V
EN/UVLO
=1.4V
2.0 2.6
0
3.3 μA
μA
Maximum Switching Frequency 650 kHz
Minimum Switching Frequency 40 kHz
Maximum Current Limit 420 600 800 mA
Minimum Current Limit 80 120 150 mA
Switch V
CESAT
I
SW
= 200mA 0.5 V
R
REF
Voltage
l
1.18
1.17
1.20 1.215
1.23
V
V
R
REF
Voltage Line Regulation 6V < V
IN
< 100V 0.01 0.03 %/V
R
REF
Pin Bias Current (Note 3)
l
80 400 nA
Error Amplifier Voltage Gain 150 V/V
Error Amplifier Transconductance
∆I = 2µA
140 μmhos
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V unless otherwise noted.