2
LT1615/LT1615-1
sn16151 16151fas
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
V
IN
, SHDN Voltage ................................................... 15V
SW Voltage .............................................................. 36V
FB Voltage .................................................................V
IN
Current into FB Pin ................................................. 1mA
Junction Temperature........................................... 125°C
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
LT1615ES5
LT1615ES5-1
LT1615IS5
LT1615IS5-1
S5 PART MARKING
SW 1
GND 2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
FB 3
5 V
IN
4 SHDN
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage LT1615-1 1.0 V
LT1615 1.2 V
Quiescent Current Not Switching 20 30 µA
V
SHDN
= 0V 1 µA
FB Comparator Trip Point ● 1.205 1.23 1.255 V
FB Comparator Hysteresis 8mV
Output Voltage Line Regulation 1.2V < V
IN
< 12V 0.05 0.1 %/V
FB Pin Bias Current (Note 3) V
FB
= 1.23V ● 30 80 nA
Switch Off Time V
FB
> 1V 400 ns
V
FB
< 0.6V 1.5 µs
Switch V
CESAT
I
SW
= 70mA (LT1615-1) 85 120 mV
I
SW
= 300mA (LT1615) 250 350 mV
Switch Current Limit LT1615-1 75 100 125 mA
LT1615 300 350 400 mA
SHDN Pin Current V
SHDN
= 1.2V 2 3 µA
V
SHDN
= 5V 8 12 µA
SHDN Input Voltage High 0.9 V
SHDN Input Voltage Low 0.25 V
Switch Leakage Current Switch Off, V
SW
= 5V 0.01 5 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1615E and LT1615E-1 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the
–40°C to 85°C operating temperature range are assured by design,
T
JMAX
= 125°C, θ
JA
= 256°C/W
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 1.2V, V
SHDN
= 1.2V unless otherwise noted.
LTIZ
LTKH
LTXZ
LTBHT
characterization and correlation with statistical process controls. The
LT1615I/LT1615I-1 is guaranteed to meet performance specifications over
the –40°C to 85°C operating temperature range.
Note 3: Bias current flows into the FB pin.
Consult LTC Marketing for parts specified with wider operating temperature ranges.