LTC3775 Linear Technology, LTC3775 Datasheet - Page 3

• Manufacturer Part Number: LTC3775
• Description: High Frequency Synchronous Step-Down Voltage Mode DC/DC Controller
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
junction temperature range, otherwise specifi cations are at T
SYMBOL
Input Supply
V
I
RUN/SHDN Pin
V
V
V
I
Error Amplifi er
V
ΔV
ΔV
I
I
f
Soft-Start
I
R
Current Limit
I
I
I
V
V
INTV
INTV
ΔV
ΔV
V
V
VIN
RUN
FB
COMP
0dB
SS
LIMB
LIMT
SENSE
IN
RUN
SHDN
SHDN(HYST)
FB
ILIMT(MAX)
ILIMB(MAX)
DROPOUT
UVLO
SS
FB
OUT
INTVCC(LINE)
INTVCC(LOAD)
CC
CC
Low Dropout Voltage Regulator
PARAMETER
V
Input DC Supply Current
RUN/SHDN Pin Enable Threshold
RUN/SHDN Pin Shutdown Threshold
RUN/SHDN Pin Shutdown Threshold Hysteresis
RUN/SHDN Pin Source Current
Feedback Pin Voltage
Feedback Voltage Line Regulation
Output Voltage Load Regulation
FB Pin Input Current
COMP Pin Output Current
Error Amplifi er Unity-Gain Crossover Frequency
SS Pin Source Current
SS Pin Pull-Down Resistance in Current Limit
I
I
SENSE Pin Input Current
Topside Current Limit Threshold (V
Bottom Side Current Limit Threshold (PGND-SW) V
LDO Regulator Output Voltage
INTV
INTV
INTV
INTV
LIMB
LIMT
IN
Supply Voltage
CC
CC
CC
CC
Source Current
Sink Current
Line Regulation
Load Regulation
Regulator Dropout Voltage (V
UVLO Voltage
IN
-SENSE)
IN
– V
INTVCC
) I
The
CONDITIONS
V
V
V
V
V
4.5V < V
1V < V
V
Sourcing
Sinking
(Note 6)
V
V
7.5V < V
ΔI
INTV
Hysteresis
INTVCC
A
FB
RUN
RUN/SHDN
RUN/SHDN
RUN/SHDN
FB
SS
ILIMT
ILIMB
INTVCC
= 25°C. V
l
= 0.7V (Note 5)
= 0.6V
= 0V
CC
= 0V
denotes the specifi cations which apply over the full operating
COMP
= 0.1V
= 0.5V
= 20mA
Rising
IN
IN
= 0mA to 20mA
< 38V
< 38V
Rising
= 0V
= 1.5V
< 2V (Note 6)
IN
= 12V, V
RUN
= 5V, unless otherwise specifi ed.
l
l
l
l
l
l
0.5955
0.597
MIN
1.19
–0.5
–50
4.5
4.9
3.0
–9
90
90
80
–1
1
0.600
±0.01
1.22
0.74
0.01
0.01
–0.1
0.35
TYP
140
–10
100
100
100
3.5
1.3
5.2
3.6
0.5
14
–1
–4
–1
–1
25
LTC3775
0.6045
0.603
MAX
1.25
–11
110
110
120
0.1
5.5
4.2
38
50
1
UNITS
3
MHz
3775f
%/V
%/V
mA
mV
mA
mA
mV
mV
kΩ
μA
μA
μA
nA
μA
μA
μA
μA
%
%
V
V
V
V
V
V
V
V
V