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LTC3604 Datasheet, PDF (6/24 Pages) Linear Technology – 2.5A, 15V Monolithic Synchronous Step-Down Regulator
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LTC3604
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VIN = 12V, fO = 1MHz, L = 1.5μH unless otherwise noted.
Output Ripple Voltage
Burst Mode Operation
SW
5V/DIV
VOUT
20mV/DIV
AC-COUPLED
IL
1A/DIV
VIN = 12V
VOUT = 1.8V
ILOAD = 180mA
2μs/DIV
Output Ripple Voltage
Forced Continuous Mode
SW
5V/DIV
VOUT
20mV/DIV
AC-COUPLED
IL
1A/DIV
3604 G15
VIN = 12V
VOUT = 1.8V
ILOAD = 180mA
2μs/DIV
Output Tracking
1V/DIV
VOUT
TRACK
0.5V/DIV
VFB
3604 G16
VIN = 12V
VOUT = 1.8V
RLOAD = 36Ω
2ms/DIV
3604 G17
Start-Up from Shutdown
Burst Mode Operation
RUN
2V/DIV
PGOOD
5V/DIV
VOUT
1V/DIV
IL
2A/DIV
VIN = 12V
VOUT = 1.8V
ILOAD = 2.5A
200μs/DIV
3604 G18
Start-Up from Shutdown
Forced Continuous Mode
RUN
2V/DIV
PGOOD
5V/DIV
VOUT
1V/DIV
IL
2A/DIV
VIN = 12V
VOUT = 1.8V
ILOAD = 2.5A
200μs/DIV
3604 G19
Start-Up Into Pre-Biased Output
(1V Pre-Bias) Burst Mode
Operation
RUN
2V/DIV
PGOOD
5V/DIV
VOUT
1V/DIV
IL
1A/DIV
VIN = 12V
VOUT = 1.8V
ILOAD = 20mA
1ms/DIV
3604 G20
Load Step
Burst Mode Operation
VOUT
100mV/DIV
AC-COUPLED
IL
2A/DIV
ILOAD
2A/DIV
VIN = 12V
10μs/DIV
VOUT = 1.8V
ILOAD = 250mA TO 2.5A
Load Step
Forced Continuous Mode
VOUT
100mV/DIV
AC-COUPLED
IL
2A/DIV
3604 G21
ILOAD
2A/DIV
VIN = 12V
10μs/DIV
VOUT = 1.8V
ILOAD = 250mA TO 2.5A
Short-Circuit Waveforms
Forced Continuous Mode
PGOOD
2V/DIV
VOUT
1V/DIV
IL
2A/DIV
3604 G22
VIN = 12V
VOUT = 1.8V
100μs/DIV
3604 G23
3604f
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