LTC3445 datasheet(4/24 Pages) LINER

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LTC3445

3445fa

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC3445EUF is guaranteed to meet performance specifica-

tions 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.

ELECTRICAL CHARACTERISTICS

Note 3: TJ is calculated from the ambient temperature, TA, and power

dissipation, PD, according to the following formula:

TJ = TA + PD • 37°C/W

Note 4: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

Note 5: Determined by design, not production tested.

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC1 = VCC2 = 3.6V, unless otherwise noted.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tSU(RSTA)

Repeated Start Condition Setup Time

(Note 5)

600

tSU(STOP)

Stop Condition Setup Time

(Note 5)

600

tHD(DIN)

Data Hold Time, Input

(Note 5)

tSU(DAT)

Data Setup Time

(Note 5)

100

VTHR

SCL and SDA Logic Input Threshold

1.8

VHYS

SCL and SDA Logic Input Hysteresis

(Note 5)

ILVTRACK

VTRACK Leakage

VCC = 3.6V

1.44

2.2

µA

ILVBACKUP

VBACKUP Leakage

VCC = 3.6V

●

µA

ILADD7

ADD7 Leakage

VCC = 3.6V

●

µA

ILADD6

ADD6 Leakage

VCC = 3.6V

●

µA

ILSCL

SCL Leakage

VCC = 3.6V

●

µA

ILSDA

SCL Leakage

VCC = 3.6V

●

µA

ILLDO1

LDO1 Leakage

VCC = 3.6V, RUN = 0

●

µA

ILLDO2

LDO2 Leakage

VCC = 3.6V, RUN = 0

●

µA

ILLDO1FB

LDO1FB Leakage

VCC = 3.6V, RUN = 0

●

µA

ILLDO2FB

LDO2FB Leakage

VCC = 3.6V, RUN = 0

●

µA

ILBATTFAULT BATTFAULT Leakage

VCC = 3.6V

●

µA

IFB1,2

LDO Feedback Input Current

VFB1 = 0.6V

●

µA

TYPICAL PERFOR A CE CHARACTERISTICS

Supply Current vs Supply Voltage

SUPPLY VOLTAGE (V)

2.4

300

400

500

3.6

4.4

5.6

3445 G01

200

100

2.8

3.2

4.8

5.2

ALL ON

BUCK

TWO LDOs

RUN = HIGH

RUN = LOW

ONE LDO

VOUT vs DAC

DAC VALUE

1.2

1.4

3445 G02

1.0

0.8

1.6

1.1

1.3

0.9

1.5

0mA

600mA

DAC VALUE

0.008

0.010

0.012

3445 G03

0.006

0.004

–0.002

0.002

0.016

0.014

100mA

VOUT Step Size vs DAC

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