LTC3550-1_15 Datasheet, PDF (4/24 Pages) Linear Technology – Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550-1
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_DCIN = 5V, V_USBIN = 5V, V_CC = 3.6V unless otherwise noted.
SYMBOL
f_OSC
R_PFET
R_NFET
I_LSW
PARAMETER
Oscillator Frequency
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
SW Leakage Current
CONDITIONS
V_OUT = 100%
V_OUT = 0V
MIN TYP MAX UNITS
1.2
1.5
1.8
MHz
210
kHz
0.4
Ω
0.35
Ω
0.01
±1
µA
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: Guaranteed by long term current density limitations.
Note 3: The LTC3550E-1 is guaranteed to meet the 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 4: Failure to solder the exposed backside of the package to the PC
board will result in a thermal resistance much higher than 40°C/W. See
Thermal Considerations.
Note 5: Supply Current includes IDC and ITERM pin current (approx-
imately 100μA each) but does not include any current delivered to the
battery through the BAT pin (approximately 100mA).
Note 6: Supply Current includes IUSB and ITERM pin current (approx-
imately 100μA each) but does not include any current delivered to the
battery through the BAT pin (approximately 100mA).
Note 7: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
35501f
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