LTC3413IFE Datasheet, PDF (3/16 Pages) Linear Technology – Monolithic Synchronous Regulator

LTC3413
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
f_OSC
Switching Frequency
Switching Frequency Range
R_OSC = 309k
(Note 6)
0.88 1.00 1.12
MHz
0.30
2.00
MHz
R_PFET
R_NFET
I_LIMIT
V_UVLO
I_LSW
V_RUN
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
Peak Current Limit
Undervoltage Lockout Threshold
SW Leakage Current
RUN Threshold
I_SW = 300mA
I_SW = 300mA
V_RUN = 0V, V_IN = 5.5V (Note 7)
85
110
mΩ
65
90
mΩ
3.8
5.4
A
1.75
2
2.25
V
0.1
1
μA
0.5
0.65
0.8
V
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: The LTC3413E 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. LTC3413I is guaranteed to meet specified
performance from –40°C to 85°C.
Note 3: The LTC3413 is tested in a feedback loop that adjusts V_FB to
achieve a specified error amplifier output voltage (I_TH).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T_J is calculated from the ambient temperature TA and power
dissipation P_D as follows: LTC3413E: T_J = T_A + (P_D • 38°C/W)
Note 6: 2MHz operation is guaranteed by design and not production tested.
Note 7: Shutdown current and SW leakage current are only tested during
wafer sort.
Note 8: 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.
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
100
V_OUT = 1.25V
90 T_A = 25°C
80
V_IN = 2.5V
70
V_IN = 3.3V
60
50
40
30
20
10
0
0.01
0.1
1
LOAD CURRENT (A)
10
3413 G01
Efficiency vs Input Voltage
100
V_OUT = 1.25V
90 ^{TA = 25°C}
LOAD = 1A
LOAD = 3A
80
70
LOAD = 100mA
60
50
40
30
20
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3413 G02
Load Regulation
0
–0.05
T_A = 25°C
–0.10
–0.15
–0.20
–0.25
–0.30
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
3413 G03
3413fc
3