LTC3400/LTC3400B
2
3400fa
V
IN
Voltage ................................................. –0.3V to 6V
SW Voltage ................................................. –0.3V to 6V
SHDN, FB Voltage ....................................... –0.3V to 6V
V
OUT
........................................................... –0.3V to 6V
Operating Temperature Range (Note 2) .. –30°C to 85°C
Storage Temperature Range ................... –65°C to 125°
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
S6 PART MARKING
T
JMAX
= 125°C, θ
JC
= 102°C/W
LTWK
LTUN
LTC3400ES6
LTC3400BES6
(Note 1)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3400E/LTC3400BE are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –30°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 1.2V, V
OUT
= 3.3V, unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Voltage I
LOAD
= 1mA 0.85 1 V
Minimum Operating Voltage SHDN = V
IN
(Note 4) 0.5 0.65 V
Output Voltage Adjust Range 2.5 5 V
Feedback Voltage ● 1.192 1.23 1.268 V
Feedback Input Current V
FB
= 1.25V (Note 3) 1 nA
Quiescent Current (Burst Mode Operation) V
FB
= 1.4V (Note 5), LTC3400 Only 19 30 µA
Quiescent Current (Shutdown) V
SHDN
= 0V, Not Including Switch Leakage 0.01 1 µA
Quiescent Current (Active) Measured On V
OUT
300 500 µA
NMOS Switch Leakage V
SW
= 5V 0.1 5 µA
PMOS Switch Leakage V
SW
= 0V 0.1 5 µA
NMOS Switch On Resistance V
OUT
= 3.3V 0.35 Ω
V
OUT
= 5V 0.20 Ω
PMOS Switch On Resistance V
OUT
= 3.3V 0.45 Ω
V
OUT
= 5V 0.30 Ω
NMOS Current Limit 600 850 mA
Burst Mode Operation Current Threshold LTC3400 Only (Note 3) 3 mA
Current Limit Delay to Output (Note 3) 40 ns
Max Duty Cycle V
FB
= 1.15V ● 80 87 %
Switching Frequency 0.95 1.2 1.5 MHz
● 0.85 1.2 1.5 MHz
SHDN Input High 1V
SHDN Input Low 0.35 V
SHDN Input Current V
SHDN
= 5.5V 0.01 1 µA
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Minimum V
IN
operation after start-up is only limited by the
battery’s ability to provide the necessary power as it enters a deeply
discharged state.
Note 5: Burst Mode operation I
Q
is measured at V
OUT
. Multiply this value
by V
OUT
/V
IN
to get the equivalent input (battery) current.
SW 1
GND 2
FB 3
6 V
IN
5 V
OUT
4 SHDN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
Consult LTC Marketing for parts specified with wider operating temperature ranges.
