LT3513 Ver la hoja de datos (PDF) - Linear Technology
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LT3513 Datasheet PDF : 20 Pages
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LT3513
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = 3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switch 3 (250mA BOOST)
FB3 Voltage
1.20
1.22
1.24
V
● 1.19
1.25
V
FB3 Voltage Line Regulation
FB3 Pin Bias Current
Error Amplifier 3 Voltage Gain
Error Amplifier 3 Transconductance
Switch 3 Current Limit
4.5V < VIN < 32V
(Note 4)
ΔI = 10μA
0.01
0.03
%/V
●
30
200
nA
250
V/V
220
μmhos
0.25
0.3
0.38
A
Switch 3 VCESAT
Switch 3 Leakage Current
ISW3 = 0.2A
FB3 = 1.5V
200
mV
0.1
1
μA
BIAS Pin Current Due to SW3
Maximum Duty Cycle (SW3)
ISW3 = 0.2A
18
mA
●
84
88
%
Schottky Diode Drop
Switch 4 (250mA Inverter)
NFB4 Voltage
NFB4 Voltage Line Regulation
NFB4 Pin Bias Current
I = 170mA
4.5V < VIN < 32V
(Note 4)
900
mV
–1.205 –1.180 –1.155
V
● –1.215
–1.145
V
0.01
0.03
%/V
●
5
16
μA
Error Amplifier 4 Voltage Gain
200
V/V
Error Amplifier 4 Transconductance
Switch 4 Current Limit
ΔI = 10μA
220
μmhos
0.28
0.3
0.40
A
Switch 4 VCESAT
Switch 4 Leakage Current
ISW4 = 0.2A
NFB4 = –1.5V
200
mV
0.1
1
μA
BIAS Pin Current Due to SW4
Maximum Duty Cycle (SW4)
ISW4 = 0.2A
18
mA
84
88
%
Schottky Diode Drop (D4)
I = 170mA
700
mV
NPN LDO
FB5 Voltage
0.61
0.625
0.63
V
● 0.6
0.65
V
Base Drive Current
FB5 = 0.5V
6
8
10
mA
LDOPWR Minimum Voltage
BD = 3.5V
4.5
V
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: The LT3513E is guaranteed to meet specified performance from
0°C to 125°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3513I is guarenteed over the full –40°C to 125°C operating junction
temperature range.
Note 3: The CT pin is held low until FB1, FB2, FB3 and NFB4 all ramp
above the FB threshold offset.
Note 4: Current flows out of FB1, FB2, FB3 and NFB4.
Note 5: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
Note 6: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 7: 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
range when overtemperature protection is active. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
3513fa
4
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