LTC3400B_15 Datasheet, PDF (2/12 Pages) Linear Technology – 600mA, 1.2MHz Micropower Synchronous Boost Converter in ThinSOT

LTC3400/LTC3400B
ABSOLUTE AXI U RATI GS
(Note 1)
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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
GND 2
FB 3
6 V_IN
5 V_OUT
4 SHDN
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T_JMAX = 125°C, θ_JC = 102°C/W
ORDER PART
NUMBER
LTC3400ES6
LTC3400BES6
S6 PART MARKING
LTWK
LTUN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS _{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.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Start-Up Voltage
Minimum Operating Voltage
Output Voltage Adjust Range
I_LOAD = 1mA
SHDN = V_IN (Note 4)
0.85
1
V
0.5 0.65
V
2.5
5
V
Feedback Voltage
q 1.192 1.23 1.268
V
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
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
1
nA
19
30
µA
0.01
1
µA
300
500
µA
0.1
5
µA
0.1
5
µA
0.35
Ω
0.20
Ω
0.45
Ω
0.30
Ω
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
Switching Frequency
V_FB = 1.15V
q 80
87
%
0.95 1.2
1.5
MHz
q 0.85
1.2
1.5
MHz
SHDN Input High
1
V
SHDN Input Low
0.35
V
SHDN Input Current
V_SHDN = 5.5V
0.01
1
µA
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.
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.
3400fa
2