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LTC3218

3218fa

ELECTRICAL CHARACTERISTICS

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN to GND ................................................... –0.3V to 6V

CPO to GND ................................................ –0.3V to 6V

ENF, ENT .......................................... –0.3V to VIN + 0.3V

ICPO, IILED (Note 2)...............................................500mA

CPO Short-Circuit Duration .............................. Indeﬁnite

Storage Temperature Range................... –65°C to 125°C

Operating Temperature Range (Note 3) ... –40°C to 85°C

(Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Power Supply

VIN Operating Voltage

●

2.9

4.5

IVIN Operating Current

ICPO = 0mA, 1x Mode

ICPO = 0mA, 2x Mode

980

1.7

µA

IVIN Shutdown Current

ENF = ENT = LOW, VCPO = 0V

●

1.1

µA

LED Current

Torch Current Ratio

(ILED/ISET)

ILED = 50mA

ENT = HIGH, ENF = LOW

765

850

935

A/A

Flash Current Ratio

(ILED/ISET)

ILED = 150mA

ENT = LOW, ENF = HIGH

2205

2450

2695

A/A

Flash Current Ratio

(ILED/ISET)

ILED = 150mA

ENT = ENF = HIGH

2970

3300

3630

A/A

ILED Dropout Voltage (VILED)

Mode Switching Threshold, Δ(VCPO – VILED),

ILED = 100mA

7mV

Mode Switching Delay (LED Warm-Up Time)

0.5

Turn-On Time

ENF, ENT

to LED Current On

160

µs

Minimum LED Forward Voltage

ILED = 50mA

●

2.2

TOP VIEW

DDB PACKAGE

10-LEAD (3mm

× 2mm) PLASTIC DFN

CPO

ILED

ENT

ISETT

VIN

GND

ENF

ISETF

TJMAX = 125°C, θJA = 76°C/W

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C, VIN = 3.6V, CIN = CFLY = 2.2µF, CCPO = 4.7µF, ENF = HIGH, unless

otherwise noted.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3218EDDB#PBF

LTC3218EDDB#TRPBF

LCHS

10-Lead (3mm × 2mm) Plastic DFN

–40°C to 85°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

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