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LTC3217 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3217
Description  600mA Low Noise Multi-LED Camera Light Charge Pump
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3217 Datasheet(HTML) 3 Page - Linear Technology

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LTC3217
3
3217f
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
The
● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBAT = 3.6V, C1 = C2 = C3 = C4 = 2.2µF, unless otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may become impaired.
Note 2: Based on charge pump long-term current density limitations.
Assumes an operating duty cycle of
≤ 10% under absolute maximum
conditions for durations less than 10 seconds. Maximum current for
continuous operation is 300mA.
Note 3: Based on LED current source long-term current density limitations.
Assumes an operating duty cycle of
≤ 10% under absolute maximum
conditions for durations less than 10 seconds. Maximum current for
continuous operation is 100mA.
Note 4: The LTC3217E is guaranteed to meet performance specifications
from 0
°C to 70°C. Specifications over the –40°C to 85°C ambient operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 5: 1.5x mode output impedance is defined as (1.5VBAT – VCPO)/IOUT.
2x mode output impedance is defined as (2VBAT – VCPO)/IOUT.
LED Dropout Voltage
vs LED Current
LED CURRENT (mA)
10
0
100
200
300
400
20
30
40
50
3217 G01
60
70
80
90 100
VBAT = 3.6V
LED PIN VOLTAGE (V)
0
0
20
40
60
80
100
120
0.2
0.4
0.6
0.8
3217 G02
1.0
VBAT = 3.6V
RISET (kΩ)
0
40
80
120
20
60
100
10
20
30
40
3217 G03
50
5
015
25
35
45
LED Pin Current
vs LED Pin Voltage
ILED vs RISET
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
EN1, EN2
Low Level Input Voltage (VIL)
●
0.4
V
High Level Input Voltage (VIH)
●
1.4
V
Input Current (IIH)
●
730
µA
Input Current (IIL)
●
–1
1
µA
Minimum PWM On-Time
EN2 Only
●
50
µs
Maximum PWM Off-Time
EN2 to Remain Enabled, EN1 = Low
●
1ms
ISET1, ISET2
VISET1, ISET2
ILED1-4 = 12.5mA
●
1.175
1.215
1.255
V
IISET1, ISET2 Current Range
●
31.25
375
µA
IISET1, ISET2 Short-Circuit Current
800
µA
TA = 25°C unless otherwise noted.



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