S-81246SGY-T Просмотр технического описания (PDF) - Seiko Instruments Inc

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S-81246SGY-T

HIGH-PRECISION VOLTAGE REGULATOR

Seiko Instruments Inc 

HIGH-PRECISION VOLTAGE REGULATOR

S-812XXSG Series

3 Temperature characteristic of output voltage

The temperature characteristic of the output voltage is expressed by the following formula in the range of

-40C to 85C.

VOUT x (±0.1) mV/C typ.

VREF

* VREF is 0.7 V min., 0.8 V typ., 0.9 V max.

Transient Response

1. Line transient response

The overshoot and undershoot are caused in the output voltage if the input voltage fluctuates while the output

current is constant. Figure 7 shows the output voltage fluctuation due to input voltage change between 6.0 V and

10 V in square wave. Table 19 shows the parameter dependency when input voltage fluctuates. For reference,

Figure 8 describes the measurement circuit.

Input voltage 6.0

10 V

Output voltage

Overshoot

Undershoot

Figure 7 Output voltage fluctuation due to input voltage fluctuation

P.G.

Fast amplifier

VIN S-812XXSG VOUT

VSS

CL

+

-

Oscilloscope

Figure 8 Measuring circuit

Table 29 Parameter dependency due to input voltage fluctuation

Parameter

Output current IOUT

Load capacitance CL

Input voltage fluctuation

Temperature Ta

VIN*

Method to decrease

overshoot

Method to decrease

undershoot

Decrease

Increase

Decrease



Decrease

Increase

Decrease

High temperature

*
VIN: High voltage value - low voltage value

For reference, the next page describes the results of measuring the ringing amounts at the VOUT pin using the

output current (IOUT), load capacitance (CL), input voltage fluctuation width (
VIN), and temperature as parameters.

14

Seiko Instruments Inc.

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