LTC3564_15 Datasheet, PDF (3/20 Pages) Linear Technology – 2.25MHz, 1.25A Synchronous Step-Down Regulator

LTC3564
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating junction temperature range, otherwise specifications are T_A = 25°C.
V_IN = 3.6V unless otherwise specified.
SYMBOL
I_S
f_OSC
R_PFET
PARAMETER
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
R_DS(ON) of P-Channel FET
R_NFET
R_DS(ON) of N-Channel FET
I_LSW
V_RUN
I_RUN
t_SOFTSTART
SW Leakage
RUN Threshold
RUN Leakage Current
Soft-Start Time
CONDITIONS
(Note 5)
V_FB = 0.5V or V_OUT = 90%, I_LOAD = 0A
V_FB = 0.62V or V_OUT = 103%, I_LOAD = 0A
V_RUN = 0V, V_IN = 4.2V
V_FB = 0.6V or V_OUT = 100%
S5 Package
DCB Package
S5 Package
DCB Package
V_RUN = 0V, V_SW = 0V or 5V, V_IN = 5V
V_FB from 10% to 90% Full Scale
MIN TYP MAX
300
400
20
35
0.1
1
●
1.8
2.25
2.7
0.15
0.2
0.15
0.15
0.2
0.15
±0.01 ±1
● 0.3
1
1.5
●
±0.01 ±1
0.6
0.9
1.2
UNITS
μA
μA
μA
MHz
Ω
Ω
Ω
Ω
μA
V
μA
ms
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliabilty and lifetime.
Note 2: The LTC3564E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C to
125°C operating junction termperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3564I is guaranteed over the full –40°C to 125°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
LTC3564ES5: T_J = T_A + (P_D)(215°C/W)
LTC3564EDCB: T_J = T_A + (P_D)(64°C/W)
Note 4: The LTC3564 is tested in a proprietary test mode.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
3564f
3