TDA3663 Просмотр технического описания (PDF) - NXP Semiconductors.

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TDA3663

Very low dropout voltage/quiescent current 3.3 V voltage regulator

NXP Semiconductors. 

Philips Semiconductors

TDA3663

Very low dropout voltage/quiescent current 3.3 V voltage regulator

11.3.1 Application circuit with backup function

Sometimes a backup function is needed to supply, for example, a microcontroller for a

short period of time when the supply voltage spikes to 0 V (or even −1 V).

This function can easily be built with the TDA3663 by using an output capacitor with a

large value. When the supply voltage is 0 V (or −1 V), only a small current will flow into

pin REG from this output capacitor (a few µA).

The application circuit is given in Figure 4.

VP

C1(1)

1 µF

1

3

TDA3663

VREG = 3.3 V

C2(2)

2, 4

mgs587

(1) C1 is optional (to minimize supply noise only).

(2) C2 ≤ 4700 µF.

Fig 4. Application circuit with backup function (SO4 version)

9397 750 15047

Product data sheet

Rev. 05 — 13 June 2005

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

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