LTC4041
TA = 25°C, unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
ISCAP vs VSCAP with Different
PROG Resistor Values
Step-Down Charger Efficiency
vs VSCAP
VCAPFB vs Temperature
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ꢀ ꢁꢂꢃꢄ
ꢀꢁꢂ
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ꢀꢁꢂ
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R
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R
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R
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ꢀ ꢁꢂꢃ
ꢀ ꢁꢂꢃꢃꢄ
ꢀ ꢁꢂ
ꢀ ꢁꢂꢃꢄꢅ
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ꢀ ꢁꢂ
ꢀꢁꢀ
R
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R
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R
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R
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ꢀ ꢁꢂꢃ
ꢀ ꢁꢂꢃꢃꢄ
ꢀ ꢁꢂ
ꢀ ꢁꢂꢃꢄꢅ
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ꢀꢁꢂ
ꢀꢁꢂꢃꢁRAꢀꢄRꢁ ꢅꢆꢇꢈ
ꢀꢁAꢂ
ꢀꢁAꢂ
ꢀꢁꢀꢂ ꢃꢁꢂ
ꢀꢁꢀꢂ ꢃꢁꢄ
ꢀꢁꢀꢂ ꢃꢁꢄ
Step-Down Charger Oscillator
Frequency vs Temperature
Step-Down Charger PMOS
On-Resistance vs VSYS
Step-Down Charger NMOS
On-Resistance vs VSYS
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ꢀꢁꢂꢃ
ꢀꢁꢂꢃ
ꢀꢁꢀꢂ
ꢀꢁꢂꢃ
ꢀꢁꢂꢂ
ꢀꢁꢂꢃ
ꢀꢁꢂꢃ
ꢀꢁꢂ
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ꢀꢁꢂ
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ꢀꢁꢂꢃꢄ
ꢀꢁꢂꢃꢄ
ꢀꢁꢂꢃ
ꢀꢁꢂꢃ
ꢀꢁꢂꢃꢄ
ꢀꢁꢂꢃꢄ
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ꢀ ꢁꢂꢁꢃ
ꢀ ꢁꢂꢃꢄ
ꢀ ꢁꢂꢃꢄ
ꢀꢁ
ꢀꢁ
ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢀ ꢀꢁꢂ ꢀꢁꢂ
ꢀꢁꢂ
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ꢀꢁꢂ
ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢂ ꢀꢁꢀ ꢀꢁꢂ ꢀꢁꢂ
ꢀꢁꢂ
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ꢀꢁꢂꢃꢁRAꢀꢄRꢁ ꢅꢆꢇꢈ
ꢀ
ꢀꢁꢀ
ꢀꢁꢀ
ꢀꢁꢀꢂ ꢃꢁꢄ
ꢀꢁꢀꢂ ꢃꢁꢀ
ꢀꢁꢀꢂ ꢃꢁꢄ
Charging Profile: Two 10F
Supercapacitors In Series
Backup to Normal Mode
Transition Waveform
Normal to Backup Mode
Transition Waveform
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ꢀ ꢁA
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ꢀꢁꢂꢃꢄꢁ
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ꢀꢁꢂꢃꢄꢁ
ꢀꢁꢀ
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ꢀꢁAꢂ
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ꢀ ꢁꢂ
ꢀꢁꢀ
ꢀꢁꢂꢃꢄꢁ
ꢀAꢁꢂꢃꢄ
ꢀꢁ
R
ꢀRꢁꢂ
ꢀ ꢁꢂ
ꢀ
ꢀꢁAꢂ
ꢀ ꢁꢂꢃꢄ
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ꢀ ꢁꢂꢃꢄ
ꢀꢁAꢂ
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ꢀꢁ
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ꢀꢁAꢂ
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ꢀ ꢁꢂꢃꢄ
R
ꢀRꢁꢂ
ꢀ ꢁꢂ
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R
ꢀ ꢁꢂ
ꢀRꢁꢂ
ꢀꢁꢂꢃꢄꢁ
ꢀAꢁꢂꢃꢄ
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ꢀꢁAꢂ
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ꢀ ꢁA
ꢀꢁꢀ
ꢀAꢁꢂꢃꢄ
ꢀA
ꢀA
ꢀꢁ
ꢀA
ꢀꢁ
ꢀꢁꢀꢂ ꢃꢁꢄ
ꢀꢁꢀꢂ ꢃꢁꢄ
ꢀꢁꢀꢂ ꢃꢁꢄ
ꢀꢁꢂꢃꢄꢅꢆ
ꢀꢁꢁꢂꢃꢄꢅꢆꢇ
ꢀꢁꢂꢃꢄꢅ
Rev A
6
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