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Voltage Regulator - Seiko Instruments

Número de pieza S-1170
Descripción Voltage Regulator
Fabricantes Seiko Instruments 
Logotipo Seiko Instruments Logotipo
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S-1170 datasheet

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S-1170 pdf
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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_00
S-1170 Series
„ Pin Configuration
SOT-89-5
Top view
54
123
Table 2
Pin No.
1
2
3
4
5
Symbol
ON/OFF
VSS
NC*1
VIN
VOUT
Description
Shutdown pin
GND pin
No connection
Input voltage pin
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.
Figure 2
6-Pin HSON(A)
Top view
654
123
Bottom view
123
*1
654
*2
*1. Connect the exposed thermal die
pad at shadowed area to the
board, and set electric potential
open or VSS.
However, do not use it as the
function of electrode.
*2. Be careful of the contact with
other wires because the pinch
lead has the same electric
potential as VSS.
Table 3
Pin No.
1
2
3
4
5
6
Symbol
VOUT*1
VOUT*1
ON/OFF
VSS
VIN*2
VIN*2
Description
Output voltage pin
Output voltage pin
Shutdown pin
GND pin
Input voltage pin
Input voltage pin
*1. Short pins 1 and 2.
*2. Short pins 5 and 6.
Figure 3
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S-1170 arduino
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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1170 Series
Rev.3.0_00
„ Standard Circuit
Input
CIN*1
VIN VOUT
ON/OFF
VSS
Output
CL*2
Single GND
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):
Output capacitor (CL):
ESR of output capacitor:
4.7 µF or more
4.7 µF or more
0.5 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 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.
10
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