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TDA3609JR Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. TDA3609JR
Description  Multiple voltage regulator with switch and ignition buffers
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 2 page
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1997 Aug 15
2
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch and
ignition buffers
TDA3609JR
FEATURES
General
• Extreme low noise behaviour and good stability with
very small output capacitors
• Two V
P-state controlled regulators (regulator 1 and
regulator 3) 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 of −18 to +50 V
• Low reverse current of regulator 2
• Low quiescent current (when regulator 1, regulator 3,
and power switch are switched-off)
• Hold output (only valid when regulator 1 is switched-on)
• Reset and hold outputs (open collector outputs)
• Adjustable reset delay time
• High ripple rejection
• Back-up capacitor for regulator 2
• Two independent ignition buffers (one inverted and with
open collector output).
Protections
• Reverse polarity safe (down to −18 V without high
reverse current)
• 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-circuited safe to ground and VP.
GENERAL DESCRIPTION
The TDA3609JR 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 a foldback current
protection (regulator 1 and regulator 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 protections, operated by an enable
input
• Reset and hold outputs that can be used to interface by
the microcontroller. The reset-signal can be used to call
up the microcontroller and the hold output indicates
regulator 1 voltage available and within range.
• A supply pin which can withstand load dump pulses and
negative supply voltages.
• Regulator 2 that will be switched on at a back-up voltage
greater than 6.5 V and off when the output voltage of
regulator 2 drops below 1.9 V.
• A provision for 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
TDA3609JR
DBS17P
plastic DIL-bent-SIL (special bent) power package; 17 leads
(lead length 12 mm)
SOT475-1




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