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LTC3633_15 Datasheet, PDF (3/28 Pages) Linear Technology – Dual Channel 3A, 15V Monolithic Synchronous Step-Down Regulator
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LTC3633
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 12V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Supply Range
l
3.6
15
V
IQ
Input DC Supply Current (VIN1 + VIN2)
Both Channels Active (Note 4)
MODE = 0V
Sleep Current
Shutdown
MODE = INTVCC, VFB1, VFB2 > 0.6
RUN1 = RUN2 = 0V
1.3
mA
500
µA
13
µA
VFB
∆VLINE_REG
∆VLOAD_REG
IFB
gm(EA)
tON
tOFF
fOSC
Feedback Reference Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On Time
Minimum Off Time
Oscillator Frequency
VIN = 3.6V to 15V
ITH = 0.8V to 1.6V
ITH = 1.2V
VON = 1V, VIN = 4V
VIN = 6V
VRT = INTVCC
RT = 160k
RT = 80k
l 0.594
0.6
0.606
V
0.02
%/V
0.05
%
±30
nA
1.8
mS
20
ns
40
60
ns
1.4
2
2.6
MHz
1.7
2
2.3
MHz
3.4
4
4.6
MHz
ILIM
Positive Valley Switch Current Limit
Negative Valley Switch Current Limit
2.6
3.5
4.5
A
–2
A
RDS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
130
mΩ
65
mΩ
ISW(LKG)
Switch Leakage Current
VIN = 15V, VRUN = 0V
0.01
±1
µA
VVIN-OV
VIN Overvoltage Lockout Threshold
VIN Rising
VIN Falling
16.8
17.5
18
V
15.8
16.5
17
V
INTVCC Voltage
3.6V < VIN < 15V, 0mA Load
3.1
3.3
3.5
V
INTVCC Load Regulation
0mA to 50mA Load, VIN = 4V to 15V
0.7
%
RUN Threshold Rising
RUN Threshold Falling
l 1.18
1.22
1.26
V
l 0.98
1.01
1.04
V
RUN Leakage Current
V2P5 Voltage
PGOOD Good-to-Bad Threshold
PGOOD Bad-to-Good Threshold
RPGOOD
tPGOOD
tSS
ITRACKSS
VPHMODE
PGOOD Pull-Down Resistance
Power Good Filter Time
Internal Soft-Start Time
VFB During Tracking
TRACKSS Pull-Up Current
PHMODE Threshold Voltage
VMODE/SYNC MODE/SYNC Threshold Voltage
IMODE
SYNC Threshold Voltage
MODE/SYNC Input Current
VIN = 15V
ILOAD = 0mA to 10mA
VFB Rising
VFB Falling
VFB Rising
VFB Falling
10mA Load
10% to 90% Rise Time
TRACKSS = 0.3V
PHMODE VIH
PHMODE VIL
MODE VIH
MODE VIL
SYNC VIH
MODE = 0V
MODE = INTVCC
0
±3
µA
l 2.46
2.5
2.54
V
8
10
%
–8
–10
%
–3
–5
%
3
5
%
15
Ω
20
40
µs
400
700
µs
0.28
0.3
0.315
V
1.4
µA
1
V
0.3
V
1
V
0.4
V
0.95
V
1.5
µA
–1.5
µA
For more information www.linear.com/LTC3633
3633fd
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