LTC3620 Datasheet, PDF (3/16 Pages) Linear Technology – Ultralow Power 15mA Synchronous Step-Down Switching Regulator

LTC3620
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_FMIN
f_EXT
I_FMIN/MODE
I_SW
I_FB
FMIN/MODE Input Voltage High
FMIN/MODE Input Voltage Low
FMIN/MODE Input Frequency
FMIN/MODE Pin Leakage Current
Switch Leakage Current
V_FB Pin Current
V_UVLO
V_LOBATB
R_LOBATB
V_HLOBATB
R_PFET
R_NFET
Undervoltage Lockout (UVLO)
LOBATB Threshold
LOBATB Pull-Down On-Resistance
LOBATB Hysteresis
R_DS(ON) of P-channel FET (Note 5)
R_DS(ON) of N-channel FET (Note 5)
V_RUN = 0V, V_SW = 0V or 5.5V, V_IN = 5.5V
LTC3620, V_FB = 0.6V
LTC3620-1, V_FB = 1.1V
V_IN Decreasing
V_IN Decreasing
I_SW = 50mA, V_IN = 3.6V
I_SW = –50mA, V_IN = 3.6V
0.9
V
0.7
V
20
300
kHz
±0.01
±1
μA
±0.01
±1
μA
0
±30
nA
1.2
2.0
μA
2.7
2.8
2.9
V
2.93
3.0
3.08
V
15
Ω
100
mV
2.0
Ω
1.0
Ω
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
reliability and lifetime.
Note 2: T_J is calculated from the ambient temperature, T_A, and power
dissipation, P_D, according to the following formula:
T_J = T_A + (P_D)(88.5°C/W)
Note 3: The LTC3620 is tested in a proprietary test mode that connects V_FB
to the output of the error amplifier.
Note 4: The LTC3620E is guaranteed to meet performance specifications
from 0°C to 85°C junction temperature. Specifications over the –40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 5: The DFN switch-on resistance is guaranteed by correlation to
wafer level measurements.
3620f
3