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S-L2980A44MC-TF-G Datasheet(PDF) 9 Page - Seiko Instruments Inc |
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S-L2980A44MC-TF-G Datasheet(HTML) 9 Page - Seiko Instruments Inc |
9 / 23 page HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-L2980 Series Seiko Instruments Inc. 9 Technical Terms 1. Low Dropout Voltage Regulator The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in low on-resistance transistor. 2. Low ESR Low ESR means the Equivalent Series Resistance of a capacitor is small. The low ESR ceramics output capacitor (CL) can be used in the S-L2980 Series. A capacitor whose ESR is 10Ω or less can be used. 3. Output Voltage (VOUT) The accuracy of the output voltage is ensured at ± 2.0 % under the specified conditions of fixed input voltage *1, fixed output current, and fixed temperature. *1. Differs depending upon the product. Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range of the output voltage. Refer to the “ Electrical Characteristics” and “ Typical Characteristics” for details. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ • OUT IN OUT1 V ΔV ΔV Regulation Line 4. Indicates the dependency of the output voltage on the input voltage. That is, the value shows how much the output voltage changes due to a change in the input voltage with the output current remaining unchanged. 5. Load Regulation ( ΔV OUT2) Indicates the dependency of the output voltage on the output current. That is, the value shows how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 6. Dropout Voltage (Vdrop) Indicates the difference between the input voltage (VIN1) and output voltage when the output voltage falls to 98 % of the output voltage (VOUT(E)) by gradually decreasing the input voltage. Vdrop=VIN1–(VOUT(E)×0.98) |
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