LTC3541_15 Datasheet, PDF (17/20 Pages) Linear Technology – High Efficiency Buck VLDO Regulator

TYPICAL APPLICATIO S
Dual Output with Minimal External Components Using Auto Start-Up Sequence,
Buck in Burst Mode Operation for High Efficiency Down to Low Load Currents
V_IN
3.2V TO 4.2V
V_OUT1
2.5V
200mA
SW ENVLDO
2.2µH
V_IN
MODE
ENBUCK GND
22pF 154k
LTC3541
10µF
BUCKFB LFB
LV_IN
LV_OUT
73k
PGND
165k
576k
V_OUT2
1.8V
300mA
2.2µF
3541 TA02a
V_OUT
2V/DIV
LV_OUT
2V/DIV
V_IN
2V/DIV
I_VOUT = 200mA
I_LVOUT = 300mA
4ms/DIV
LTC3541
3541 TA02b
Dual Output with Minimal External Components Using Auto Start-Up
Sequence, Buck in Pulse Skip Mode for Low Noise Operation
V_IN
3.2V TO 4.2V
V_OUT1
2.5V
200mA
SW ENVLDO
2.2µH
V_IN
MODE
ENBUCK GND
22pF 154k
LTC3541
10µF
BUCKFB LFB
LV_IN
LV_OUT
73k
PGND
165k
576k
V_OUT2
1.8V
300mA
2.2µF
3541 TA03a
V_OUT
2V/DIV
LV_OUT
2V/DIV
V_IN
2V/DIV
I_VOUT = 200mA
I_LVOUT = 300mA
4ms/DIV
3541 TA03b
3541fa
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