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| LTC3558_15 Datasheet, PDF (5/32 Pages) Linear Technology – Linear USB Battery Charger with Buck and Buck-Boost Regulators | |||
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LTC3558
ELECTRICAL CHARACTERISTICS The l denotes speciï¬cations that apply over the full operating temperature
range, otherwise speciï¬cations are at TA = 25°C. VCC = 5V, BAT = PVIN1 = PVIN2 = 3.6V, RPROG = 1.74k, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RDSP(ON)
PMOS RDS(ON)
VOUT = 3.6V
0.6
Ω
RDSN(ON)
NMOS RDS(ON)
0.6
Ω
ILEAK(P)
PMOS Switch Leakage
Switches A, D
â1
1
μA
ILEAK(N)
NMOS Switch Leakage
Switches B, C
â1
1
μA
DCBUCK(MAX) Maximum Buck Duty Cycle
MODE = 0
l 100
%
DCBOOST(MAX) Maximum Boost Duty Cycle
MODE = 0
75
%
tSS2
Soft-Start Time
0.5
ms
ROUT(PD)
VOUT Pull-Down in Shutdown
10
kΩ
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: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD ⢠θJA)
Note 3: The LTC3558E is guaranteed to meet speciï¬cations from 0°C to
85°C. Speciï¬cations over the â40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls.
Note 4: VCC supply current does not include current through the PROG pin
or any current delivered to the BAT pin. Total input current is equal to this
speciï¬cation plus 1.00125 ⢠IBAT where IBAT is the charge current.
Note 5: IC/10 is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 6: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
3558f
5
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