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LTC3550

3550fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC Supply Current

Active Mode

Sleep Mode

Shutdown

(Note 7)

VFB = 0.5V, ILOAD = 0A

VFB = 0.62V, ILOAD = 0A

VRUN = 0V, VCC = 5.5V

300

0.1

400

µA

fOSC

Oscillator Frequency

VFB = 0.6V

VFB = 0V

1.2

1.5

210

1.8

MHz

kHz

RPFET

RDS(ON) of P-Channel FET

0.4

RNFET

RDS(ON) of N-Channel FET

0.35

ILSW

SW Leakage Current

0.01

±1

µA

The

● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VDCIN = 5V, VUSBIN = 5V, VCC = 3.6V unless otherwise noted.

ELECTRICAL CHARACTERISTICS

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 is guaranteed to meet the performance

speciﬁcations from 0°C to 85°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 100

μA 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 100

μA 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.

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