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| LTC3456 Datasheet, PDF (8/28 Pages) Linear Technology – 2-Cell, Multi-Output DC/DC Converter with USB Power Manager | |||
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LTC3456
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise specified.
Switching Waveforms
(Battery Powered)
IL1
50mA/DIV
VSW1
5V/DIV
IL2
200mA/DIV
VSW2_BST
5V/DIV
VBATT = 2.4V
VPWRON = 2V
ICORE = 100mA
IMAIN = 100mA
0.5µs/DIV
3456 G28
Switching Waveforms
(Wall/USB Powered)
IL1
200mA/DIV
VSW1
5V/DIV
IL3
100mA/DIV
VSW2_BK
5V/DIV
VEXT = 5V
VPWRON = 2V
ICORE = 100mA
IMAIN = 100mA
0.5µs/DIV
3456 G29
USB â Battery Switchover
(Main Converter Transient
Waveforms)
VMAIN
100mV/DIV
(AC COUPLED)
IL2
200mA/DIV
IL3
100mA/DIV
SUSPEND
5V/DIV
VUSB = 5V
VUSBHP = 5V
VBATT = 2.4V
ICORE = 100mA
IMAIN = 100mA
200µs/DIV
3456 G30
USB â Battery Switchover
(Core Converter Transient
Waveforms)
VCORE
100mV/DIV
(AC COUPLED)
IL1
100mA/DIV
SUSPEND
5V/DIV
VUSB = 5V
VUSBHP = 5V
VBATT = 2.4V
ICORE = 100mA
IMAIN = 100mA
200µs/DIV
3456 G31
Power Up/Power Down
Sequencing (Battery Powered)
VPWRON
5V/DIV
VMAIN
5V/DIV
VCORE
2V/DIV
RESET
5V/DIV
VBATT = 2.4V
ICORE = 10mA
IMAIN = 10mA
100ms/DIV
3456 G32
Power Supply Sequencing
(Battery Powered)
VPWRON
5V/DIV
VINT
5V/DIV
VCORE
2V/DIV
VMAIN
5V/DIV
VBATT = 2.4V
ICORE = 5mA
200µs/DIV
3456 G33
3456fa
8
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