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LTC3210-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V BAT = 3.6V, C1 = C2 = C3 = C4 = 2.2μF, RM = 30.1k, RC = 24.3k,
ENM = high, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Unused MLED Detection
Test Current
Threshold Voltage
MLED Tied to CPO
V CPO – V MLED
l
l
4
0.5
16
1.5
μA
V
CLED Current
LED Current Ratio (I CLED /I RC )
I CLED = Full-Scale
l
6930
7700
8470
A/A
LED Dropout Voltage
CLED Current, 3-Bit Linear DAC
Mode Switch Threshold, I CLED = Full-Scale
1 ENC Strobe (FS)
7 ENC Strobes (FS/7)
500
380
54
mV
mA
mA
Charge Pump (CPO)
1x Mode Output Voltage
1.5x Mode Output Voltage
2x Mode Output Voltage
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
I CPO = 0mA
I CPO = 0mA
I CPO = 0mA
V BAT = 3.4V, V CPO = 4.6V (Note 4)
V BAT = 3.2V, V CPO = 5.1V (Note 4)
V BAT
4.55
5.05
0.55
3.15
3.95
V
V
V
Ω
Ω
Ω
CLOCK Frequency
Mode Switching Delay
0.8
0.4
MHz
ms
CPO Short-Circuit Detection
Threshold Voltage
l
0.4
1.3
V
Test Current
CPO = 0V, ENM = ENC = Low
l
10
30
mA
ENC, ENM
V IL
V IH
l
l
1.4
0.4
V
V
I IH
I IL
ENM = ENC = 3.6V
ENM = ENC = 0V
l
l
10
–1
15
20
1
μA
μA
ENC, ENM Timing
t PW
Minimum Pulse Width
l
200
ns
t SD
t EN
Low Time to Shutdown (ENC, ENM = Low)
Current Source Enable Time
(ENC, ENM = High) (Note 5)
l
l
50
50
150
150
250
250
μs
μs
RM, RC
V RM , V RC
l
1.16
1.20
1.24
V
I RM , I RC
l
80
μA
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. Maximum current for continuous
operation is 300mA.
Note 3: The LTC3210E-1 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: 1.5x mode output impedance is defined as (1.5V BAT – V CPO )/I OUT .
2x mode output impedance is defined as (2V BAT – V CPO )/I OUT .
Note 5: If the part has been shut down then the initial enable time is about
100μs longer due to the bandgap enable time.
32101fd
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