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S-1170B18UC-OTDTFG Datasheet(PDF) 10 Page - Seiko Instruments Inc

Part # S-1170B18UC-OTDTFG
Description  HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S-1170B18UC-OTDTFG Datasheet(HTML) 10 Page - Seiko Instruments Inc

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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1170 Series
Rev.3.0_02
Seiko Instruments Inc.
10
Standard Circuit
ON/OFF
VSS
VOUT
VIN
CIN
*1
CL
*2
Input
Output
GND
Single GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 4.7
µF or more can be used for CL.
Figure 10
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Application Conditions
Input capacitor (CIN):
4.7
µF or more
Output capacitor (CL):
4.7
µF or more
ESR of output capacitor:
0.5
Ω or less
Caution A general series regulator may oscillate, depending on the external components selected.
Check that no oscillation occurs with the application using the above capacitor.
Selection of Input and Output Capacitors (CIN, CL)
The S-1170 Series requires an output capacitor between the VOUT and VSS pins for phase compensation.
A ceramic capacitor with a capacitance of 4.7
µF or more provides a stable operation in all temperature
ranges. When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a ceramic
capacitor with a capacitance of 4.7
µF or more and an ESR of 0.5 Ω or less is required.
The output overshoot and undershoot values, which are transient response characteristics, vary depending
on the output capacitor value. The required capacitance value for the input capacitor differs depending on
the application.
The recommended application values are, CIN
= 4.7 µF or more and CL = 4.7 µF or more, however, perform
a thorough evaluation using the actual device, including evaluation of temperature characteristics.


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