TC1305

DS21526A-page 6

© 2002 Microchip Technology Inc.

4.4

Select Mode

different values. By connecting the SELECT pin to

output channels supplying a fixed 3.0V output. Last but

not least, leaving the SELECT pin floating sets both

voltages to 2.8V. This output voltage functionality

provides high design flexibility and minimizes costs

associated with inventory, time-to-market and new

device qualifications.

4.5

RESET Output

The microprocessor supervisor of theTC1305 provides

accurate supply voltage monitoring and reset timing

during power-up, power-down and brown-out condi-

this point it becomes an open circuit and does not sink

current) and is able to reject negative going transients

(glitches) on the power supply line. Transient immunity

can further be improved by adding a capacitor close to

4.6

Turn On Response

The turn on response is defined as two separate

The TC1305 has a fast Wake Up Time (10

µsec typical)

when released from shutdown. See Figure 4-1 for the

is defined as the time it takes for the output to rise to 2%

The total turn on response is defined as the Settling

within 2% of its fully enabled value (40

µsec typical)

when released from shutdown. The settling time of the

output voltage is dependent on load conditions and

FIGURE 4-1:

WAKE-UP RESPONSE

TIME

98%

2%

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