S-8331 Seiko Instruments USA, S-8331 Datasheet - Page 24

• Manufacturer Part Number: S-8331
• Description: Step-Up Switching Regulator (DC/DC Converter ICs)
• Manufacturer: Seiko Instruments USA

24
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
Precautions
Make sure that a loss in the switching transistor (particularly at high temperatures) does not exceed
Configure parts and components so that the line to the VSS pin (indicated by the bold line shown in
depends upon the coils and the capacitors you use, check it using an actually-mounted model.
the allowable power dissipation.
Figure 17) becomes short as much as possible. If a resistor and/or an inductance component stays
on the line, the VSS potential of the IC varies depending upon the switching current.
Inherent ripple voltage or spike noise may generate in the switching regulator. Because it greatly
Mount capacitors, diodes, coils and other components as near as possible to the the IC.
When switching the output voltage by the electric volume, the soft start does not function. Pay
attention to overshoot occuring when increasing the output voltage with a large width (refer to 5.
Output Voltage Changeover shown in the transitory response characteristics).
Seiko Instruments Inc. shall not be resposible for any patent infringement by products
including the S-8330/8331 Series in connection with the method of using the S-8330/8331
Series in such products, the product specifications or the country of destination thereof .
CPU
Vss
Figure 17 S-8330 Series Application Circuit
VCLK
ON/OFF
VDIN
VSTRB
Seiko Instruments Inc.
VIN
S-8330 Series
CONT
Vss
V
OUT
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