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LTC3218
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V IN to GND ................................................... –0.3V to 6V
PIN CONFIGURATION
TOP VIEW
CPO to GND ................................................ –0.3V to 6V
CP 1
10 V IN
ENF, ENT ........................................... –0.3V to V IN + 0.3V
I CPO , I ILED (Note 2) ...............................................500mA
CPO Short-Circuit Duration .............................. Inde?nite
Storage Temperature Range................... –65°C to 125°C
CPO 2
I LED 3
ENT 4
I SETT 5
11
9
8
7
6
CM
GND
ENF
I SETF
Operating Temperature Range (Note 3).... –40°C to 85°C
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
T JMAX = 125°C, θ JA = 76°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3218EDDB#PBF
TAPE AND REEL
LTC3218EDDB#TRPBF
PART MARKING
LCHS
PACKAGE DESCRIPTION
10-Lead (3mm × 2mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based ?nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C, V IN = 3.6V, C IN = C FLY = 2.2 μ F, C CPO = 4.7 μ F, ENF = HIGH, unless
otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Power Supply
V IN Operating Voltage
I VIN Operating Current
I CPO = 0mA, 1x Mode
I CPO = 0mA, 2x Mode
●
2.9
980
1.7
4.5
V
μA
mA
I VIN Shutdown Current
ENF = ENT = LOW, V CPO = 0V
●
1.1
3
μA
LED Current
Torch Current Ratio
I LED = 50mA
765
850
935
A/A
(I LED /I SET )
ENT = HIGH, ENF = LOW
Flash Current Ratio
I LED = 150mA
2205
2450
2695
A/A
(I LED /I SET )
ENT = LOW, ENF = HIGH
Flash Current Ratio
I LED = 150mA
2970
3300
3630
A/A
(I LED /I SET )
ENT = ENF = HIGH
I LED Dropout Voltage (V ILED )
Mode Switching Threshold, Δ (V CPO – V ILED ),
7
mV
I LED = 100mA
Mode Switching Delay (LED Warm-Up Time)
0.5
ms
Turn-On Time
Minimum LED Forward Voltage
ENF, ENT
I LED = 50mA
to LED Current On
●
2.2
160
μs
V
3218fb
2
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