LTC3559-1_15 Datasheet, PDF (8/24 Pages) Linear Technology – Linear USB Battery Charger with Dual Buck Regulators

LTC3559/LTC3559-1
TYPICAL PERFORMANCE CHARACTERISTICS
Buck Regulator Start-Up Transient
V_OUT
500mV/DIV
INDUCTOR
CURRENT
I_L = 200mA/DIV
EN
2V/DIV
PV_IN = 3.8V
50μs/DIV
PULSE SKIP MODE
LOAD = 6Ω
3559 G33
Buck Regulator Pulse Skip Mode
Operation
V_OUT
20mV/DIV (AC)
SW
2V/DIV
INDUCTOR
CURRENT
I_L = 50mA/DIV
PV_IN = 3.8V
LOAD = 10mA
200ns/DIV
3559 G34
Buck Regulator Burst Mode
Operation
V_OUT
20mV/DIV (AC)
SW
2V/DIV
INDUCTOR
CURRENT
I_L = 60mA/DIV
PV_IN = 3.8V
LOAD = 60mA
2μs/DIV
3559 G35
Buck Regulator Transient
Response, Pulse Skip Mode
INDUCTOR
CURRENT
I_L = 200mA/DIV
V_OUT
50mV/DIV (AC)
LOAD STEP
5mA TO 290mA
PV_IN = 3.8V
50μs/DIV
3559 G36
Buck Regulator Transient
Response, Burst Mode Operation
INDUCTOR
CURRENT
I_L = 200mA/DIV
V_OUT
50mV/DIV (AC)
LOAD STEP
5mA TO 290mA
PV_IN = 3.8V
50μs/DIV
3559 G37
3559fb
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