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S-814A49AMC-BDNT2G Datasheet(PDF) 11 Page - Seiko Instruments Inc |
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S-814A49AMC-BDNT2G Datasheet(HTML) 11 Page - Seiko Instruments Inc |
11 / 32 page LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.1_00 S-814 Series Seiko Instruments Inc. 11 6. Dropout voltage (Vdrop) Indicates a difference between input voltage (VIN1) and output voltage when output voltage falls by 98 % of VOUT(E) by gradually decreasing the input voltage. Vdrop=VIN1−(VOUT(E)×0.98) 7. Temperature coefficient of output voltage ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ • Δ Δ OUT OUT V Ta V The shadowed area in Figure 11 is the range where VOUT varies in the operating temperature range when the temperature coefficient of the output voltage is ±100 ppm/°C. −40 25 +0.28 mV/°C VOUT [V] VOUT(E) *1 85 Ta [ °C] −0.28mV/°C *1. The mesurement value of output voltage at 25 °C. Figure 11 Typical example of S-814A28A A change in temperatures of output voltage [mV/°C] is calculated using the following equation. [] [ ] [] 1000 C / ppm V Ta V V V C / mV Ta V OUT OUT ) S ( OUT OUT ÷ ° • Δ Δ × = ° Δ Δ 3 * 2 * *1 *1. The change in temperature of the dropout voltage *2. Specified output voltage *3. Output voltage temperature coefficient |
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