Datasheet

LT3468/LT3468-1/LT3468-2
2
346812fa
V
IN
Voltage .............................................................. 16V
SW Voltage ................................................ –0.4V to 50V
CHARGE Voltage...................................................... 10V
DONE Voltage .......................................................... 10V
Current into DONE Pin .......................................... ±1mA
Maximum 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
S5 PART
MARKING
T
JMAX
= 125°C
θ
JA
= 150°C ON BOARD OVER
GROUND PLANE
θ
JC
= 90°C/W
LTAEC
LTAGQ
LTBCH
LT3468ES5
LT3468ES5-1
LT3468ES5-2
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3V, V
CHARGE
= V
IN
unless otherwise noted. (Note 2) Specifications
are for the LT3468, LT3468-1 and LT3468-2 unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current Not Switching 5 8 mA
V
CHARGE
= 0V 0 1 µA
Input Voltage Range ● 2.5 16 V
Switch Current Limit LT3468 (Note 3) 1.1 1.2 1.3 A
LT3468-2 0.77 0.87 0.97 A
LT3468-1 0.45 0.55 0.65 A
Switch V
CESAT
LT3468, I
SW
= 1A 330 430 mV
LT3468-2, I
SW
= 650mA 210 280 mV
LT3468-1, I
SW
= 400mA 150 200 mV
V
OUT
Comparator Trip Voltage Measured as V
SW
– V
IN
● 31 31.5 32 V
V
OUT
Comparator Overdrive 300ns Pulse Width 200 400 mV
DCM Comparator Trip Voltage Measured as V
SW
– V
IN
● 10 36 80 mV
CHARGE Pin Current V
CHARGE
= 3V 15 40 µA
V
CHARGE
= 0V 0 0.1 µA
Switch Leakage Current V
IN
= V
SW
= 5V, in Shutdown ● 0.01 1 µA
CHARGE Input Voltage High ● 1V
CHARGE Input Voltage Low ● 0.3 V
Minimum Charge Pin Low Time High→Low→High 20 µs
DONE Output Signal High 100kΩ from V
IN
to DONE 3 V
DONE Output Signal Low 33µA into DONE Pin 100 200 mV
DONE Leakage Current V
DONE
= 3V, DONE NPN Off 20 100 nA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3468E/LT3468E-1/LT3468E-2 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,
characterization and correlation with statistical process.
Note 3: Specifications are for static test. Current limit in actual application
will be slightly higher.
5 VIN
4 CHARGE
SW 1
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
GND 2
DONE 3