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TDA3683J Datasheet

Multiple voltage regulator

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TDA3683J
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Multiple voltage regulator with switch and ignition buffer
Rev. 01 — 13 December 2004
Preliminary data sheet
1. General description
The TDA3683J is a multiple output voltage regulator with a power switch and an
ignition buffer. Several protections and diagnostic options are incorporated in this
design.
The TDA3683J is primarily developed to cover the complete power supply
requirements in car radio applications
The standby regulators (regulators 1, 2 and 3) are especially designed to supply
digital circuitry that has to be permanently connected e.g. CAN bus, DPS core and the
microcontroller. In combination with the reset delay capacitor (RDC1 or RDC2/3) and
the reset function (RST1 or RST2/3), a proper start-up sequence for a microcontroller
is guaranteed. The storage capacitor (STC) makes the standby regulator outputs
insensitive for short battery drops (e.g. during engine start-up).
The switched regulators (regulators 4, 5, 6 and 7) are intended to be used as supply
for the tuner, logic, sound processor and CD / tape control
The power switch (PSW) can be used for switching the electrically powered antenna,
display unit and CD / tape drives
The ignition buffer (IGN) is intended to produce a clean logic output signal when a
polluted ignition key signal is used as input.
2. Features
s Three enable pin controlled standby regulators:
x REG1: 5 V / 600 mA controlled by the EN1 input
x REG2: 3.3 V / 200 mA controlled by the EN2/3 input
x REG3: 1.9 V / 150 mA controlled by the EN2/3 input
s Four mode pin controlled switched regulators:
x REG4: 8.5 V / 350 mA
x REG5: 5 V / 1.8 A
x REG6: 3.3 V / 1.2 A
x REG7: 2.4 V to 10 V / 2 A adjustable using external resistor divider
s One mode pin controlled power switch; 2.2 A continuous and 3 A surge, with delayed
lower current limit so as to be less sensitive to inrush currents
s One independent ignition buffer (inverted output, open-collector) with good input
protection against high transients
s A storage capacitor is included to provide back-up supply for the standby regulators in
the event of loss of battery supply
s A hold output (3-state) which can be used to communicate to a microcontroller in the
event of an internal or external fault condition, such as:


NXP Semiconductors Electronic Components Datasheet

TDA3683J Datasheet

Multiple voltage regulator

No Preview Available !

Philips Semiconductors
TDA3683J
www.DataSheet4U.com
Multiple voltage regulator with switch and ignition buffer
x Low supply indication in Standby mode
x One or more switched regulators (except REG7) out of regulation
x Power switch output short-circuited to ground
x Load dump, thermal pre-warning and thermal shutdown
s Reset outputs (push-pull output stage) can be used to call a microcontroller in a
smooth way (adjustable delay) at the first power-up
s Two supply pins that can withstand load dump pulses and negative supply voltages;
the second supply pin (connected to REG5 and REG6) can be supplied from a
separate external voltage (e.g. DC-to-DC downconverter) to reduce power dissipation
s All regulator and power switch outputs are short-circuit proof to ground and supply
lines; the dissipation is limited in this condition since all regulators (except REG3) and
power switch have a foldback current protection incorporated
s The TDA3683J has three modes of operation:
x Sleep: all outputs disabled (very low quiescent current)
x Standby: one or more standby regulators enabled (low quiescent current)
x On: all outputs enabled
s The standby regulators (including the reset function) and the ignition buffer also
function during load dump and thermal shutdown; the switched regulators and power
switch will be disabled during these conditions
s Hysteresis is incorporated on internal switching levels
s The TDA3683J is protected against Electrostatic Discharge (ESD) on all pins
s DBS23 package with low thermal resistance and flexible leads.
3. Quick reference data
Table 1: Quick reference data
Symbol Parameter
Supplies
VP1 supply voltage 1
VP2 supply voltage 2
Iq(tot)
Tj
total quiescent supply
current
junction temperature
Conditions
operating
reverse polarity; non-operating
regulators 1, 2 and 3 on
jump start; t 10 minutes
load dump protection; t 50 ms;
tr 2.5 ms
operating
reverse polarity; non-operating
regulators 1, 2 and 3 on
jump start; t 10 minutes
load dump protection; t 50 ms;
tr 2.5 ms
VEN1, VEN2/3 and VMODE < 0.8 V
VMODE and VIGNIN < 0.8 V;
VEN1 and VEN2/3 > 2.4 V
operating
Min Typ Max Unit
9 14.4 18
- - 18
4.0 14.4 50
- - 30
- - 50
V
V
V
V
V
6.5 14.4 18
- - 18
0-
50
- - 30
- - 50
V
V
V
V
V
- 5 30 µA
- 300 450 µA
40 -
+150
°C
9397 750 13057
Preliminary data sheet
Rev. 01 — 13 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 30


Part Number TDA3683J
Description Multiple voltage regulator
Maker NXP
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