Datasheet

LTC3215
3
3215fc
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: Based on long-term current density limitations. Assumes an
operating duty cycle of ≤ 10% under absolute maximum conditions for
durations less than 10 seconds. Max current for continuous operation is
350mA.
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, C
IN
= C1 = C2 = 2.2µF, C
CPO
= 4.7µF.
PARAMETER CONDITIONS MIN TYP MAX UNITS
CPO Short Circuit Detection
Threshold Voltage EN = High
●
0.5 1.5 V
Test Current EN = Low, V
CPO
= 0V
●
10 30 mA
EN
High Level Input Voltage (V
IH
)
●
1.4 V
Low Level Input Voltage (V
IL
)
●
0.4 V
Input Current (I
IH
)
●
–1 1 µA
Input Current (I
IL
)
●
–1 1 µA
I
SET
V
ISET
I
SET
= 50µA
●
1.195 1.22 1.245 V
I
ISET
●
225 µA
Note 3: The LTC3215E is guaranteed to meet performance specifications
from 0°C
to 85°C. Specifications over the –40°C to 85°C ambient
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
I
LED
Dropout Voltage
vs LED Current
I
LED
Pin Current
vs I
LED
Pin Voltage I
LED
vs R
SET
TYPICAL PERFORMANCE CHARACTERISTICS
(T
A
= 25°C unless otherwise specified)
LED CURRENT (mA)
0 200
DROPOUT VOLTAGE (V)
400 800600
3216 G01
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
IN
= 3.6V
I
LED
PIN VOLTAGE (V)
0
I
LED
PIN CURRENT (mA)
600
500
400
300
200
100
0
0.2 0.4 0.6 0.8
3216 G02
1.0
I
LED
= 500mA
400mA
300mA
200mA
100mA
R
SET
(kΩ)
I
LED
(mA)
1573 G03
1000
800
600
400
200
0
0
10
20
25
5 15
30
35
40