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| LTC3626_15 Datasheet, PDF (3/28 Pages) Linear Technology – 20V, 2.5A Synchronous Monolithic Step-Down Regulator with Current and Temperature Monitoring | |||
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LTC3626
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 3). PVIN = SVIN = 12V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
PVIN
Input Supply Range
SVIN
Input Supply Range
VVOUT
Output Voltage Range (Note 5)
IQ
Input DC Supply Current
Forced Continuous Operation
PVIN
SVIN
Sleep Current
PVIN
SVIN
Shutdown
PVIN
SVIN
VFB
Feedback Reference Voltage
âVLINE(REG) VFB Line Regulation
âVLOAD(REG) VFB Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
VON = VOUT
l 3.0
l 3.6
0.6
20
V
20
V
6
V
MODE = 0, RRT = 158k, IMONIN, IMONOUT,
TMON, TSET = INTVCC
30
39
µA
900
1200
µA
VFB > 0.6V, IMONIN, IMONOUT, TMON, TSET,
MODE = INTVCC
30
39
µA
270
350
µA
ILOAD = 0A, VRUN = 0V
0.01
2
µA
13
17
µA
l 0.594 0.600 0.606
V
PVIN = SVVIN = 3.6V to 20V
ITH = 0.6V to 1.5V
0.01
%/V
0.1
%
VFB = 0.6V
ITH = 1.2V
±30
nA
1.5
mS
tON(MIN)
tOFF(MIN)
Minimum On-Time
Minimum Off-Time
Valley Switch Current Limit
VVON =1V, PVIN = SVVIN = 3.6V
PVIN = SVIN = 6V
20
ns
40
60
ns
2.4
2.9
3.6
A
Negative Valley Switch Current Limit
â1
A
fOSC
Oscillator Frequency
RDS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
VRT = INTVCC
RRT = 158k
RRT = 105k
1.4
2
2.6
MHz
1.7
2
2.3
MHz
2.5
3
3.5
MHz
115
mΩ
70
mΩ
IMONOUT Current (Note 6)
IOUT Limit Regulation Voltage
IMONIN Current (Note 6)
IIN Limit Regulation Voltage
Internal Temperature Monitor
Internal Temperature Monitor Slope (Note 7)
ISW = 2.5A
ISW = 1.5A
ISW = 0.5A
ISW = 2.5A, 20% Duty Cycle
ISW = 1.5A, 20% Duty Cycle
ISW = 0.5A, 20% Duty Cycle
TA = 25°C
148.5 156.25 164.0
µA
89.1 93.75 98.4
µA
29.7 31.25 33.5
µA
l 1.15 1.22
1.28
V
29.7 31.25 32.8
µA
17.8 18.75 19.7
µA
5.9 6.25
6.7
µA
l 1.15 1.22
1.28
V
1.5
V
200
°C/V
Temperature Limit Hysteresis
50
mV
VINTVCC
VRUN
PVIN Overvoltage Lockout Threshold
INTVCC Voltage
INTVCC Load Regulation (Note 8)
RUN Threshold
PVIN Rising
PVIN Falling
3.6V < PVIN = SVVIN < 20V
IINTVCC = 0mA to 20mA
RUN Rising
RUN Falling
21.5
V
20
20.5
V
3.1
3.3
3.5
V
0.6
%
l 1.19 1.23
1.27
V
l 0.97
1.0
1.03
V
RUN Leakage Current
PVVIN = SVVIN = 20V
0
±1
μA
For more information www.linear.com/LTC3626
3626fa
3
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