S-814A38AMC-BDCT2G 데이터 시트보기 (PDF) - Seiko Instruments Inc

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S-814A38AMC-BDCT2G

LOW DROPOUT CMOS VOLTAGE REGULATOR

Seiko Instruments Inc 

Rev.2.1_00

LOW DROPOUT CMOS VOLTAGE REGULATOR

S-814 Series

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 ⎜⎛ ΔVOUT ⎟⎞

⎝ ΔTa • VOUT ⎠

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.

VOUT [V]

+0.28 mV/°C

VOUT(E)*1

−0.28mV/°C

−40

25

*1. The mesurement value of output voltage at 25°C.

85

Ta [°C]

Figure 11 Typical example of S-814A28A

A change in temperatures of output voltage [mV/°C] is calculated using the following equation.

[ ] [ ] [ ] ΔVOUT mV / °C *1 = VOUT(S) V *2 × ΔVOUT ppm / °C *3 ÷ 1000

ΔTa

ΔTa • VOUT

*1. The change in temperature of the dropout voltage

*2. Specified output voltage

*3. Output voltage temperature coefficient

Seiko Instruments Inc.

11

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