Datasheet

LT3575
2
3575f
ABSOLUTE MAXIMUM RATINGS
SW ............................................................................60V
V
IN
, SHDN/UVLO, R
FB
, BIAS .....................................40V
SS, V
C
, TC, R
REF
, R
ILIM
..............................................5V
Maximum Junction Temperature .......................... 125°C
Operating Junction Temperature Range (Note 2)
LT3575E, LT3575I ..............................40°C to 125°C
Storage Temperature Range ..................65°C to 150°C
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
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
= 12V, unless otherwise noted.
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3575EFE#PBF LT3575EFE#TRPBF 3575FE 16-Lead Plastic TSSOP 40°C to 125°C
LT3575IFE#PBF LT3575IFE#TRPBF 3575FE 16-Lead Plastic TSSOP 40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed 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 specifi cations, go to:
http://www.linear.com/tapeandreel/
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range
l
340V
Quiescent Current SS = 0V
V
SHDN/UVLO
= 0V
4.5
01
mA
μA
Soft-Start Current SS = 0.4V 7 μA
SHDN/UVLO Pin Threshold UVLO Pin Voltage Rising
l
1.15 1.22 1.32 V
SHDN/UVLO Pin Hysteresis Current V
UVLO
= 1V 2.2 2.8 3.2 μA
Soft-Start Threshold 0.7 V
Maximum Switching Frequency 1000 kHz
Switch Current Limit R
ILIM
= 10k 2.8 3.5 4.2 A
Minimum Current Limit V
C
= 0V 400 mA
Switch V
CESAT
I
SW
= 0.5A 75 125 mV
R
REF
Voltage V
IN
= 3V
l
1.21
1.20
1.23 1.25
1.26
V
R
REF
Voltage Line Regulation 3V < V
IN
< 40V 0.01 0.03 %/ V
R
REF
Pin Bias Current (Note 3)
l
100 600 nA
PIN CONFIGURATION
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
NC
GND
TEST
TC
R
REF
R
FB
V
C
NC
V
IN
SW
SW
BIAS
SHDN/UVLO
SS
R
ILIM
17
GND
T
JMAX
= 125°C, θ
JA
= 38°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE CONNECTED TO GND