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S-19213B18A-V5T2U7 Datasheet(PDF) 16 Page - ABLIC Inc. |
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S-19213B18A-V5T2U7 Datasheet(HTML) 16 Page - ABLIC Inc. |
16 / 46 page AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 500 mA VOLTAGE REGULATOR S-19213 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-19213 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-19213 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-19213 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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