LP3311S Datasheet, PDF (6/7 Pages) Lowpower Semiconductor inc – 1MHz Fixed-Frequency PWM Operation

Preliminary Datasheet
application circuit is shown in the Figure 6. In this
circuit, the output ripple depends on the frequency of
PWM signal. For smaller output voltage ripple
(<100mV), the recommended frequency of 2.8V PWM
signal should be above 2kHz. To fix the frequency of
PWM signal and change the duty cycle of PWM signal
can get different output current. According to the
application circuit of Figure 5, output current is from
20.5mA to 5.5mA by adjusting the PWM duty cycle
from 10% to 90%.
Vin
10uF
4.7uH
Vin
SW
EN
OVP
GND
FB
LP3311S
PWM
200K
LP3311S
1uF
5K
24K
10R
0.1uF
LP3311s – 02 Version 2.0 Datasheet May.-2013
www.lowpowersemi.com
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