TDA8133 datasheet(6/13 Pages) STMICROELECTRONICS

부품명	TDA8133

상세설명	5.1 V AND 8 V DUAL-VOLTAGE REGULATOR WITH DISABLE AND RESET FUNCTIONS

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CIRCUIT DESCRIPTION

TDA8133/D

6/13

3

CIRCUIT DESCRIPTION

The TDA8133 and the TDA8133D are dual-voltage regulators with Reset and Disable functions.

The two regulation parts are supplied from a single voltage reference circuit trimmed by zener

zapping during EWS testing. Since the supply voltage of this voltage reference is connected to pin

INPUT1 (VIN1), the second regulator will not work if pin INPUT1 is not supplied.

The output stages are designed using a Darlington configuration with a typical dropout voltage of

1.2 V.

The Disable circuit will switch off pin OUTPUT2 if a voltage less than 0.8 V is applied to pin

DISABLE.

The Reset circuit checks the voltage at pin OUTPUT1. If this voltage drops below VO1 - 0.25 V

(4.85 V Typ.), the "a" comparator (Figure 3) rapidly discharges the external capacitor (Ce) and the

reset output immediately switches to low. When the voltage at pin OUTPUT1 exceeds VO1 - 0.2 V

(4.9 V Typ.), the VCe voltage increases linearly to the reference voltage (VREF = 2.5 V)

corresponding to a Reset Pulse Delay (tRD) as shown in Figure 4.

Afterwards, the reset output returns to high. To avoid glitches in the reset output, the second

comparator "b" has a large hysteresis (1.9 V).

Figure 3: Reset Diagram

t

RD

C

e

2.5V

×

10

µA

--------------------------

=

OUTPUT1

REG

VREF

-

+

50

a

+

-

Ce

VREF

0.6V

b

RESET

10 µA

3

VREF = 2.5 V

유사한 부품 번호 - TDA8133

제조업체	부품명	데이터시트	상세설명
STMicroelectronics	TDA8133	82Kb / 5P	5.1V 8V REGULATOR WITH DISABLE AND RESET
	TDA8133	185Kb / 14P	5.1 V and 8 V dual voltage regulator with disable and reset functions
	TDA8133D	185Kb / 14P	5.1 V and 8 V dual voltage regulator with disable and reset functions
	TDA8133	185Kb / 14P	5.1 V and 8 V dual voltage regulator with disable and reset functions

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제조업체	부품명	데이터시트	상세설명
STMicroelectronics	TDA8133	185Kb / 14P	5.1 V and 8 V dual voltage regulator with disable and reset functions
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TDA8133 데이터시트(PDF) 6 Page - STMicroelectronics

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