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| LTC3533 Datasheet, PDF (5/16 Pages) Linear Technology – 2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter | |||
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LTC3533
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise speciï¬ed.
Switch Pins in Buck-Boost Mode
Switch Pins Entering Buck-Boost
Mode
Output Ripple at 1A Load
SW1
2V/DIV
SW2
2V/DIV
50ns/DIV
VIN = 3.3V
VOUT = 3.3V AT 500mA
SW1
2V/DIV
SW2
2V/DIV
3533 G10
50ns/DIV
VIN = 4.2V
VOUT = 3.3V AT 500mA
3533 G11
VIN = 2.7V
VIN = 3.3V
VIN = 4.2V
1µs/DIV
VOUT = 3.3V, 20mV/DIV
COUT = 100µF CERAMIC
3533 G12
Load Transient Response in Fixed
Frequency Mode, No Load to 1.5A
VOUT
100mV/DIV
IL
0.5A/DIV
100µs/DIV
VIN = 3.6V
VOUT = 3.3V
COUT = 100µF X5R CERAMIC
3533 G13
Load Transient Response in Auto
Burst Mode, No Load to 600mA
VOUT
100mV/DIV
LOAD
0.5A/DIV
100µs/DIV
VIN = 3.6V
VOUT = 3.3V
COUT = 100µF X5R CERAMIC +
100µF LOW ESR TANTALUM
3533 G14
Burst Mode Operation
Transition from Burst Mode
Operation to Fixed Frequency Mode
VOUT
50mV/DIV
INDUCTOR
CURRENT
0.5A/DIV
20µs/DIV
COUT = 100µF CERAMIC
3533 G15
VOUT
50mV/DIV
INDUCTOR
CURRENT
0.5A/DIV
200µs/DIV
COUT = 100µF CERAMIC
3533 G16
3533f
5
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