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42V, 350mA Synchronous Step-Down Regulator with 2.5μA Quiescent Current
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LT8606/LT8606B
42V, 350mA Synchronous
Step-Down Regulator with
2.5µA Quiescent Current
FEATURES DESCRIPTION Wide Input Voltage Range: 3.0V to 42V
nn Ultralow Quiescent Current Burst Mode® Operation:
nn 0.5),
a minimum inductance is required to avoid sub-harmonic
oscillation. See Application Note 19.
Input Capacitor
Bypass the input of the LT8606 circuit with a ceramic
capacitor of X7R or X5R type. Y5V types have poor performance over temperature and applied voltage, and
should not be used. A 4.7μF to 10μF ceramic capacitor
is adequate to bypass the LT8606 and will easily handle
the ripple current. Note that larger input capacitance is
required when a lower switching frequency is used. If
the input power source has high impedance, or there is
Rev C 14 For more information www.analog.com LT8606/LT8606B
APPLICATIONS INFORMATION
significant inductance due to long wires or cables, additional bulk capacitance may be necessary. This can be
provided with a low performance electrolytic capacitor.
Step-down regulators draw current from the input supply in pulses with very fast rise and fall times. The input
capacitor is required to reduce the resulting voltage ripple at the LT8606 and to force this very high frequency …
