LTC3775EUD View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3775EUD Datasheet PDF : 34 Pages
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LTC3775
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VRUN = 5V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Supply
VIN
VIN Supply Voltage
IVIN
Input DC Supply Current
RUN/SHDN Pin
VRUN
VSHDN
VSHDN(HYST)
IRUN
RUN/SHDN Pin Enable Threshold
RUN/SHDN Pin Shutdown Threshold
RUN/SHDN Pin Shutdown Threshold Hysteresis
RUN/SHDN Pin Source Current
Error Amplifier
VFB = 0.7V (Note 5)
VRUN = 0V
VRUN/SHDN Rising
VRUN/SHDN = 0V
VRUN/SHDN = 1.5V
l 4.5
38
V
3.5
mA
14
μA
1.19 1.22 1.25
V
0.74
V
140
mV
–1
μA
–5
μA
VFB
Feedback Pin Voltage
0.597 0.600 0.603
V
l 0.5955
0.6045
V
ΔVFB
ΔVOUT
IFB
ICOMP
f0dB
Soft-Start
Feedback Voltage Line Regulation
Output Voltage Load Regulation
FB Pin Input Current
COMP Pin Output Current
Error Amplifier Unity-Gain Crossover Frequency
4.5V < VIN < 38V
1V < VCOMP < 2V (Note 6)
VFB = 0.6V
Sourcing, VCOMP = 0V
Sinking, VCOMP = 2V
(Note 6)
±0.01
%/V
0.01
0.1
%
–50
50
nA
–0.5
–1
mA
1
60
mA
25
MHz
ISS
RSS
Current Limit
SS Pin Source Current
SS Pin Pull-Down Resistance in Current Limit
VSS = 0V
–1
μA
1.3
kΩ
ILIMB
ILIMB Source Current
VILIMB = 1V
ILIMT
ILIMT Sink Current
VILIMT = 12V
ISENSE
SENSE Pin Input Current
VILIMT(MAX) Topside Current Limit Threshold (VIN-SENSE)
VILIMT = 0.1V
VILIMB(MAX) Bottom Side Current Limit Threshold (PGND-SW) VILIMB = 0.5V
INTVCC Low Dropout Voltage Regulator
INTVCC
LDO Regulator Output Voltage
ΔVINTVCC(LINE) INTVCC Line Regulation
7.5V < VIN < 38V
ΔVINTVCC(LOAD) INTVCC Load Regulation
ΔIINTVCC = 0mA to 20mA
VDROPOUT
INTVCC Regulator Dropout Voltage (VIN – VINTVCC) IINTVCC = 20mA
VUVLO
INTVCC UVLO Voltage
INTVCC Rising
Hysteresis
l –9
–10
–11
μA
l 90
100
110
μA
1
μA
l 90
100
110
mV
l 80
100
120
mV
4.9
5.2
5.5
V
0.01
%/V
–1
–0.1
%
0.35
V
3.0
3.6
4.2
V
0.5
V
3775fa
3
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