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S-19214 датащит (PDF) 16 Page - ABLIC Inc.

№ деталь S-19214
подробность  AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 1000 mA VOLTAGE REGULATOR
скачать  46 Pages
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производитель  ABLIC [ABLIC Inc.]
домашняя страница  https://www.ablic.com
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S-19214 Datasheet(HTML) 16 Page - ABLIC Inc.

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AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 1000 mA VOLTAGE REGULATOR
S-19214 Series
Rev.1.1_00
16
Condition of Application
Input capacitor (CIN):
A ceramic capacitor with capacitance of 1.0
μF or more is recommended.
Output capacitor (CL):
A ceramic capacitor with capacitance of 1.0
μF or more is recommended.
ESR of output capacitor: A ceramic capacitor with capacitance of 100
Ω or less is recommended.
Caution Generally, in a voltage regulator, an oscillation may occur depending on the selection of the external
parts. Perform thorough evaluation including the temperature characteristics with an actual
application using the above capacitors to confirm no oscillation occurs.
Selection of Input Capacitor (CIN) and Output Capacitor (CL)
The S-19214 Series requires CL between the VOUT pin and the VSS pin for phase compensation. The operation is
stabilized by a ceramic capacitor with capacitance of 1.0
μF or more. When using an OS capacitor, a tantalum
capacitor or an aluminum electrolytic capacitor, the capacitance also must be 1.0
μF or more. However, an oscillation
may occur depending on the equivalent series resistance (ESR).
Moreover, the S-19214 Series requires CIN between the VIN pin and the VSS pin for a stable operation.
Generally, an oscillaiton may occur when a voltage regulator is used under the conditon that the impedance of the
power supply is high.
Note that the output voltage transient characteristics varies depending on the capacitance of CIN and CL and the value
of ESR.
Caution Perform thorough evaluation including the temperature characteristics with an actual application to
select CIN and CL.
Selection of Resistors (Ra, Rb) for Output Voltage External Setting
The S-19214 Series provides the type in which output voltage can be set via the external resistor. The output voltage
can be set by connecting a resistor (Ra) between the VOUT pin and the VADJ pin, and a resistor (Rb) between the
VADJ pin and the VSS pin.
Depending on the intended output voltage, select Ra and Rb from the range shown in Table 11.
Caution Since the VADJ pin impedance is comparatively high and is easily affected by noise, pay adequate
attention to the wiring pattern.
Table 11
VOUT
Ra
Rb
1.8 V
Connect to VOUT pin
Unnecessary
1.85 V to 30.0 V
0.25 k
Ω to 2.6 MΩ
10 k
Ω to 200 kΩ


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