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| LTC3538 Datasheet, PDF (5/16 Pages) Linear Technology – 800mA Synchronous Buck-Boost DC/DC Converter | |||
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LTC3538
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted
VC On/Off Threshold vs
Temperature
0.80
0.75
0.70
0.65
VC ON THRESHOLD
0.60
0.55
VC OFF THRESHOLD
0.50
0.45
0.40
â50
0
50
TEMPERATURE (°C)
100
3538 G10
Current Limit vs Temperature
4.0
VIN = VOUT = 3.6V
3.5
PEAK CURRENT LIMIT
Load Transient in Fixed
Frequency Mode
VOUT
100mV/DIV
3.0
ILOAD
200mA/DIV
2.5
2.0
LINEAR CURRENT LIMIT
1.5
â50 â25 0
25 50
TEMPERATURE (°C)
75 100
3538 G12
100μs/DIV
VIN = 3.3V
VOUT = 3.3V
ILOAD = 0mA TO 500mA
COUT = 22μF X5R CERAMIC
3538 G13
Burst Mode Operation
Transition From Burst Mode
Operation to Fixed Frequency
VOUT
50mV/DIV
IL
500mA/DIV
10μs/DIV
VIN = 3.3V
VOUT = 3.3V
ILOAD = 10mA
COUT = 22μF X5R CERAMIC
3538 G14
BURST
2V/DIV
VOUT
100mV/DIV
50μs/DIV
VIN = 3.3V
VOUT = 3.3V
ILOAD = 30mA
COUT = 22μF X5R CERAMIC
3538 G15
3538fb
5
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