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TDA3618 データシート(PDF) 2 Page - NXP Semiconductors

部品番号 TDA3618
部品情報  Multiple voltage regulator with switch and ignition buffers
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA3618 データシート(HTML) 2 Page - NXP Semiconductors

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2001 May 02
2
Philips Semiconductors
Product specification
Multiple voltage regulator with
switch and ignition buffers
TDA3618AJR
FEATURES
General
• Extremely low noise behaviour and good stability with
very small output capacitors
• Two VP-state controlled regulators and a power switch
• Regulator 2, reset and ignition buffer operate during
load dump and thermal shutdown
• Separate control pins for switching regulator 1,
regulator 3 and the power switch
• Supply voltage range from −18 to +50 V
• Low reverse current of regulator 2
• Low quiescent current when regulator 1, regulator 3 and
the power switch are switched off
• Hold output for low VP
• Hold output for regulators 1 and 3
• Hold output for foldback mode switch
• Hold output for load dump and temperature protection
• Reset (push-pull) and hold (open collector) outputs
• Adjustable reset delay time
• High ripple rejection
• Backup capacitor for regulator 2
• Two independent ignition buffers, one inverted and with
open collector output.
Protection
• Reverse polarity safe, down to −18 V
• Able to withstand voltages up to 18 V at the outputs
(supply line may be short-circuited)
• ESD protected on all pins
• Thermal protections with hysteresis
• Load dump protection
• Foldback current limit protection for
regulators 1, 2 and 3
• Delayed second current limit protection for the power
switch at short-circuit
• The regulator outputs and the power switch are DC
short-circuit safe to ground and VP.
GENERAL DESCRIPTION
The TDA3618AJR is a multiple output voltage regulator
with a power switch and ignition buffers, intended for use
in car radios with or without a microcontroller. It contains:
• Two fixed voltage regulators with foldback current
protection (regulators 1 and 3) and one fixed voltage
regulator (regulator 2) intended to supply a
microcontroller, that also operates during load dump
and thermal shutdown
• A power switch with protection, operated by an enable
input
• Reset and hold outputs that can be used to interface
with the microcontroller; the reset signal can be used to
wake up the microcontroller
• A supply pin that can withstand load dump pulses and
negative supply voltages
• Regulator 2, which is switched on at a backup voltage
greater than 6.5 V and off when the output voltage of
regulator 2 drops below 1.9 V
• A provision for the use of a reserve supply capacitor that
will hold enough energy for regulator 2 (5 V continuous)
to allow a microcontroller to prepare for loss of voltage
• An inverted ignition 1 input with open collector output
stage
• An ignition 2 input Schmitt trigger with push-pull output
stage.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA3618AJR
DBS17P
plastic DIL-bent-SIL (specially bent) power package;
17 leads (lead length 12 mm)
SOT475-1


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