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LTC3565_15 Datasheet, PDF (6/22 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter
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LTC3565
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, VIN = 3.6V, fO = 1MHz, unless
otherwise noted.
Forced Continuous Mode
Start-Up from Shutdown
Start-Up from Shutdown
SW
2V/DIV
VOUT
50mV/DIV
AC COUPLED
IL
200mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 80mA
2µs/DIV
RUN
2V/DIV
VOUT
1V/DIV
IL
500mA/DIV
3565 G19
400µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A
Burst Mode OPERATION
RUN
2V/DIV
3565 G20
VOUT
1V/DIV
IL
1A/DIV
400µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 1.25A
Burst Mode OPERATION
3565 G21
Start-Up from Shutdown with
a Prebiased Output (Forced
Continuous Mode)
Load Step
Load Step
VOUT
1V/DIV
VOUT
100mV/DIV
AC COUPLED
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
200µs/DIV
VIN = 3.6V
PREBIASED VOUT = 3V, VOUT = 1.8V
ILOAD = 0A
3565 G22
IL
1A/DIV
ILOAD
1A/DIV
40µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A to 1.25A
Burst Mode OPERATION
3565 G23
IL
1A/DIV
ILOAD
1A/DIV
40µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA to 1.25A
Burst Mode OPERATION
3565 G24
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
ILOAD
1A/DIV
40µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 250mA to 1.25A
Burst Mode OPERATION
6
VOUT Short to Ground
VOUT
1V/DIV
IL
2A/DIV
3565 G25
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A
40µs/DIV
VOUT Short to VIN (Forced
Continuous Mode)
VOUT
1V/DIV
IL
500mA/DIV
3565 G26
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A
40µs/DIV
3565 G27
3565fc
For more information www.linear.com/LTC3565
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