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| LTC3876_15 Datasheet, PDF (6/48 Pages) Linear Technology – Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing and 50mA VTT Reference | |||
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LTC3876
TYPICAL PERFORMANCE CHARACTERISTICS
Transient Response VDDQ
(Forced Continuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
10μs/DIV
LOAD TRANSIENT = 0A TO 15A
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G01
Load Step VDDQ
(Forced Continuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
5μs/DIV
LOAD STEP = 0A TO 15A
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G02
Load Release VDDQ
(Forced Continuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
5μs/DIV
LOAD RELEASE = 15A TO 500mA
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G03
Transient Response VDDQ
(Discontinuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
10μs/DIV
LOAD TRANSIENT = 0A TO 15A
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G04
Load Step VDDQ
(Discontinuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
5μs/DIV
LOAD STEP = 500mA TO 15A
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G05
Load Release VDDQ
(Discontinuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
5μs/DIV
LOAD RELEASE = 15A TO 500mA
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G06
Transient Response VTT
(Forced Continuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
Load Step VTT
(Forced Continuous Mode)
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
20A/DIV
10μs/DIV
LOAD TRANSIENT = 0A TO 15A
VIN = 12V
VOUT = 1.5V
FIGURE 10 CIRCUIT, VDDQ CHANNEL 1
3876 G07
IL
10A/DIV
5μs/DIV
LOAD STEP = 0A TO 10A
VIN = 12V
VOUT = 0.75V
FIGURE 10 CIRCUIT, VTT CHANNEL 2
Load Release VTT
ILOAD
20A/DIV
VSW
20V/DIV
VOUT
50mV/DIV
IL
10A/DIV
3876 G08
5μs/DIV
LOAD RELEASE = 10A TO 0A
VIN = 12V
VOUT = 0.75V
FIGURE 10 CIRCUIT, VTT CHANNEL 2
3876 G09
3876f
6
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