LTC3400/LTC3400B
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
GND 2
FB 3
6 V
IN
5 V
OUT
4 SHDN
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
LTC3400ES6
LTC3400BES6
S6 PART MARKING
LTWK
LTUN
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T
JMAX
= 125°C,
θ
JC
= 102°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Start-Up Voltage
Minimum Operating Voltage
Output Voltage Adjust Range
Feedback Voltage
Feedback Input Current
Quiescent Current (Burst Mode Operation)
Quiescent Current (Shutdown)
Quiescent Current (Active)
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Current Limit
Burst Mode Operation Current Threshold
Current Limit Delay to Output
Max Duty Cycle
Switching Frequency
The
q
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.
CONDITIONS
I
LOAD
= 1mA
SHDN = V
IN
(Note 4)
2.5
q
MIN
TYP
0.85
0.5
MAX
1
0.65
5
1.268
30
1
500
5
5
UNITS
V
V
V
V
nA
µA
µA
µA
µA
µA
Ω
Ω
Ω
Ω
mA
mA
ns
%
1.192
1.23
1
19
0.01
300
0.1
0.1
0.35
0.20
0.45
0.30
V
FB
= 1.25V (Note 3)
V
FB
= 1.4V (Note 5), LTC3400 Only
V
SHDN
= 0V, Not Including Switch Leakage
Measured On V
OUT
V
SW
= 5V
V
SW
= 0V
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 5V
600
LTC3400 Only (Note 3)
(Note 3)
V
FB
= 1.15V
q
q
850
3
40
80
0.95
0.85
1
87
1.2
1.2
1.5
1.5
0.35
SHDN Input High
SHDN Input Low
SHDN Input Current
V
SHDN
= 5.5V
0.01
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
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3:
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.
3400fa
2
U
MHz
MHz
V
V
µA
W
U
U
W W
W
LINER [ LINEAR TECHNOLOGY ]
