RT9161-22CV Ver la hoja de datos (PDF) - Richtek Technology
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RT9161-22CV Datasheet PDF : 10 Pages
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RT9161/A
Application Information
A 10uF capacitor with 200mΩ or higher ESR, connecting
between VOUT and GND pins, is recommended for
stability. A capacitor with ESR smaller than 200 mΩ may
cause VOUT oscillation as shown in Figure 1. Operating
temperature should be well considered to ensure that
the capacitance is no less than 10uF over the operating
temperature range. Please take the notice that Aluminum
electrolytic capacitors may cause VOUT oscillation when
operating below -25° C. The capacitance can be increased
without limit for better transient response.
A 1uF or higher capacitor should be placed between VIN
and GND to filter out input noise and ensure stable output
voltage.
Region of Stable COUT ESR vs. Load Current
100
VIN = 3.3V
CIN = 1uF
10 COUT = 10uF
1
0.1
0.01
0
Stable
Instable
100
200
300
400
500
Load Current (mA)
Figure 1
DS9161/A-23 April 2004
6
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