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LTC3816_15 Datasheet, PDF (10/44 Pages) Linear Technology – Single-Phase Wide VIN Range DC/DC Controller for Intel IMVP-6/IMVP-6.5 CPUs
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LTC3816
Typical Performance Characteristics
EXTVCC Switchover Voltage
vs Temperature
4.8
4.7
4.6
EXTVCC RAMPS HIGH
4.5
4.4
4.3
4.2
4.1
EXTVCC RAMPS LOW
4.0
3.9
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G34
EXTVCC Voltage Drop
vs Temperature
120
VEXTVCC = 5V
fOSC = 400kHz
100
ILOAD = 50mA
80
60
ILOAD = 20mA
40
20
NO LOAD
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G35
IVIN
15
50
VEXTVCC = 0V
fOSC = 400kHz
14
40
13
30
IVIN (SHUTDOWN)
12
20
IVIN
11
10
10
0
0
5 10 15 20 25 30 35 40
VIN (V)
3816 G36
IVIN (Shutdown) vs Temperature
60
VEXTVCC = VRON = 0V
50
VIN = 40V
IVIN and IEXTVCC vs Temperature
15
VIN = 12V
14 fOSC = 400kHz
40
VIN = 12V
30
20
VIN = 5V
10
13
VEXTVCC = 0V, IVIN
12
11
VEXTVCC = 5V, IEXTVCC
10
9
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G37
8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G38
VCC(SEN) and ISENN Input Current
vs Common Mode Range
20
VIN = 12V
VISENN = VCC(SEN)
15 VITC = VITCFB
VSS(SEN) = 0V
10
IVCC(SEN)
5
IISENN
0
VSS(SEN) Input Current
0
VIN = 12V
VISENN = VCC(SEN)
–10 VITC = VITCFB
VCC(CORE) = 0.3V
–20
VCC(CORE) = 0.9V
–30
VCC(CORE) = 1.5V
–5
–40
–10
0
0.25 0.50 0.75 1.00
VCC(SEN) (V)
1.25 1.50
3816 G39
–50
–0.3 –0.2 –0.1 0 0.1
VSS(SEN) (V)
0.2 0.3
3816 G40
3816f
10
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