Linear Technology DC1205A - LT3592EDDB Demoboard | 500mA Wide Input Voltage Range Step-Down LED Driver DC1205A DC1205A Data Sheet
Product codes
DC1205A
LT3592
3
3592fc
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.
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: The LT3592E is guaranteed to meet performance specifi cations
from 0°C to 125°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3592I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The operating lifetime is derated at junction
temperatures greater than 125°C.
from 0°C to 125°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3592I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The operating lifetime is derated at junction
temperatures greater than 125°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
l
3.25
3.6
V
Input Quiescent Current in Shutdown
Not Switching
V
V
SHDN
= 0.3V
2
0.1
3
2
2
mA
μA
CAP to OUT Voltage
0.4Ω CAP to OUT
BRIGHT = 1.4V
BRIGHT = 0.3V
BRIGHT = 1.4V
BRIGHT = 0.3V
l
l
190
18
200
20
210
22
mV
mV
mV
DA Pin Current to Stop OSC
–0.8
–1
–1.2
A
Switching Frequency
R
T
= 357k
R
T
= 140k
R
T
= 48.7k
350
800
800
1.9
400
900
900
2.2
450
1000
2.5
kHz
kHz
kHz
MHz
Maximum Duty Cycle
R
T
= 140k
90
94
%
SHDN Input High Voltage
2.3
V
SHDN Input Low Voltage
0.3
V
BRIGHT Input High Voltage
1.4
V
BRIGHT Input Low Voltage
0.3
V
Switch Current Limit (Note 4)
l
0.85
1.25
1.5
A
Switch V
CESAT
I
SW
= 500mA
300
mV
Boost Pin Current
I
SW
= 500mA
20
30
mA
Switch Leakage Current
1
10
μA
Minimum Boost Voltage (V
BOOST
– V
IN
)
V
OUT
= 4V
1.8
2.5
V
Boost Diode Forward Voltage
I
DIO
= 50mA
800
mV
V
FB
Voltage
OUT = CAP = 4V, Bright = 12V
l
1.185
1.21
1.235
V
V
FB
Input Leakage Current
V
FB
= 1.21V
l
–250
250
nA
The
l
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 12V, V
BOOST
= 16V, V
OUT
= 4V unless otherwise noted. (Note 2)
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may result in
device degradation or failure.
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may result in
device degradation or failure.
Note 4: Switch Current Measurements are performed when the outputs
are not switching. Slope compensation reduces current limit at higher duty
cycles.
are not switching. Slope compensation reduces current limit at higher duty
cycles.