LTC3409 Datasheet, PDF (3/16 Pages) Linear Technology – 600mA Low Vin Buck Regulator in 3mm x 3mm DFN

LTC3409
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T_A = 25°C.
V_IN = 2.2V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
SYNC t_O SYNC Timeout
Delay from Removal of EXT CLK Until Fixed
30
Frequency Operation Begins (Note 7)
R_PFET
R_NFET
I_LSW
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
SW Leakage
I_SW = 100mA, Wafer Level
I_SW = 100mA, DD Package
I_SW = 100mA, Wafer Level
I_SW = 100mA, DD Package
V_RUN = 0V, V_SW = 0V or 5V, V_IN = 5V
0.33
0.35
0.22
0.25
±0.1
±3
UNITS
µs
Ω
Ω
Ω
Ω
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3409E is 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 controls.
Note 3: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
LTC3409: T_J = T_A + (P_D)(43°C/W)
This IC includes overtemperature protection that is intended to protect the
device during momentary overload conditions. Overtemperature protection
becomes active at a junction temperature greater than the maximum
operating junction temperature. Continuous operation above the specified
maximum operating junction temperature may impair device reliability.
Note 4: The LTC3409 is tested in a proprietary test mode that connects
V_FB to the output of the error amplifier.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: ∆V_OVL is the amount V_FB must exceed the regulated feedback
voltage.
Note 7: Determined by design, not production tested.
3409f
3