LTC3207 datasheet(3/20 Pages) LINER

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LTC3207/LTC3207-1

3207fc

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LED Current Matching

Any Two Outputs, 50% of FS

LED Dropout Voltage

ILED = FS

180

Blink Rate Period

REG15, D6 and D7

1.25

2.5

ULED Up/Down Gradation Times

REG15, D4 and D5

●

0.24

0.48

0.96

0.45

0.9

1.8

VOL General Purpose Output Mode (GPO)

IOUT = 1mA, Single Output Enabled

CAM LED Current, 4-Bit Linear DAC, CAM = 1V

Full-Scale LED Current

425

Minimum (1LSB) LED Current

LED Dropout Voltage

ILED = FS

450

High Current Safety Timer

High Current Mode

2.1

Charge Pump (CPO)

1x Mode Output Impedance

0.6

1.5x Mode Output Impedance

VBAT = 3V, VCPO = 4.2V (Note 5)

3.6

2x Mode Output Impedance

VBAT = 3V, VCPO = 4.8V (Note 5)

4.1

CPO Regulation Voltage

1.5x Mode, ICPO = 20mA

2x Mode, ICPO = 20mA

4.55

5.05

CLOCK Frequency

●

0.65

0.85

1.05

MHz

SDA, SCL, ENU, CAMHL

VIL

●

0.3 • DVCC

VIH

●

0.7 • DVCC

IIH

SDA, SCL, ENU, CAMHL = DVCC

●

–1

µA

IIL

SDA, SCL, ENU, CAMHL = 0V

●

–1

µA

VOL

Digital Output Low (SDA)

IPULLUP = 3mA

●

0.12

0.4

Serial Port Timing (Notes 6, 7)

tSCL

Clock Operating Frequency

400

kHz

tBUF

Bus Free Time Between Stop and Start Condition

1.3

µs

tHD,STA

Hold Time After (Repeated) Start Condition

0.6

µs

tSU,STA

Repeated Start Condition Setup Time

0.6

µs

tSU,STO

Stop Condition Setup Time

0.6

µs

tHD,DAT(OUT)

Output Data Hold Time

900

tHD,DAT(IN)

Input Data Hold Time

tSU,DAT

Data Setup Time

100

tLOW

Clock Low Period

1.3

µs

tHIGH

Clock High Period

0.6

µs

ELECTRICAL CHARACTERISTICS The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VBAT = 3.6V, DVCC = 3V, ENU = Hi, CAMHL = LO, C1 = C2 = C3 = 2.2µF,

C4 = 4.7µF, unless otherwise noted.

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