1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

FEATURES

General

One V

state controlled regulator (regulator 2)

Regulator 2, reset and ignition buffer operate during
load dump and thermal shutdown

One control pin for switching regulator 1 and the power
switch

Supply voltage range of

18 to +50 V (operating

from 9.75 V)

Low reverse current of regulator 2

Low quiescent current (when regulator 1, power switch
and ignition input are switched off, standby)

Ignition input/output

Reset output

High ripple rejection

Power switch.

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 shortened)

ESD protected on all pins

Thermal protection

Load dump protection

Foldback current limit protection for regulators 1 and 2

Delayed second current limit protection for the power
switch

The regulator outputs and the power switch are DC
short-circuited safe to ground and V

GENERAL DESCRIPTION

The TDA3603 is a multiple output voltage regulator with a
power switch, intended for use in car radios with or without
a microcontroller.

It contains one fixed voltage regulator with a foldback
current protection (regulator 1) and one fixed voltage
regulator (regulator 2), intended to supply a
microcontroller, that also operates during load dump and
thermal shutdown.

There is a power switch with protections, operated by the
enable input.

The reset and ignition outputs can be used to interface by
the microcontroller. The reset signal can be used to call up
the microcontroller and the ignition output indicates
ignition voltage available.

The supply pin can withstand load dump pulses and
negative supply voltages.

Regulator 2 will be switched on at a supply voltage >6.5 V
and off at a voltage of regulator 2 <1.9 V.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA3603

SIL9MPF

plastic single in-line medium power package with fin; 9 leads

SOT110-1

TDA3603P

HDIP18

plastic heat-dissipating dual in-line package; 18 leads

SOT398-1

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

QUICK REFERENCE DATA

Notes

1. Minimum operating voltage, only if V

has exceeded 6.5 V.

2. The drop-out voltage of regulator 1 is measured between V

and REG1.

3. The drop-out voltage of the power switch is measured between V

and V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage

operating

9.75

14.4

regulator 2 on

note 1

2.4

14.4

jump start

10 minutes

load dump protection

during 50 ms; t

2.5 ms

total quiescent current

standby mode

400

500

operating virtual junction temperature

150

Voltage regulators

REG1

output voltage regulator 1

0.5 mA

REG1

300 mA

8.65

9.0

9.35

REG2

output voltage regulator 2

0.5 mA

REG2

50 mA;

= 14.4 V

4.8

5.0

5.2

REGd1

drop-out voltage regulator 1

REG1

= 0.3 A; note 2

0.5

Power switch

swd

drop-out voltage

= 0.3 A; note 3

0.9

peak current

10 ms

1.4

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

FUNCTIONAL DESCRIPTION

The TDA3603 is a multiple output voltage regulator with a
power switch, intended for use in car radios with or without
a microcontroller. Because of low-voltage operation of the
car radio, low-voltage drop regulators are used.

Regulator 2 will switch on when the supply voltage
exceeds 6.5 V for the first time and will switch off again
when the output voltage of regulator 2 is below 1.9 V (this
is below an engine start). When regulator 2 is switched on
and the output voltage of this regulator is within its voltage
range, the reset output will be enabled (reset will go HIGH
via a pull-up resistor) to generate a reset to the
microcontroller. The reset cycles can be extended by an
external capacitor at the reset output (pin 3). The start-up
feature is built-in to ensure a smooth start-up of the
microcontroller at first connection, without uncontrolled
switching of regulator 2 during the start-up sequence.

When both regulator 2 and the supply voltage (V

> 4.5 V)

are available, regulator 1 and the switch can be operated
by an enable input (pin 4).

All output pins are fully protected. The regulators are
protected against load dump (regulator 1 will switch off at
supply voltages higher than 25 V) and short-circuit
(foldback current protection).
The switch contains a current protection which is delayed
for

10 ms (in short-circuit condition). During this time the

current is limited to 1.4 A (V

18 V).

At supply voltages over 16.9 V the switch is clamped at
15.0 V (to avoid externally connected circuitry being
damaged by an overvoltage) and the switch will switch off
at load dump.

Interfacing with the microcontroller can be accomplished
by an ignition Schmitt trigger and ignition output buffer,
(simple full/semi on/off logic applications).

The total timing of a semi on/off logic set is shown Fig.4.

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

CHARACTERISTICS

= 14.4 V; T

amb

= 25

C; see Fig.7; unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage

operating

9.75

14.4

regulator 2 on

note 1

2.4

14.4

jump start

10 minutes

load dump protection

during 50 ms; t

2.5 ms

quiescent current

= 12.4 V; note 2

400

500

= 14.4 V; note 2

420

Schmitt trigger power supply for the power switch

thr

rising voltage threshold

4.0

4.5

5.0

thf

falling voltage threshold

3.5

4.0

4.5

hys

hysteresis

0.5

Schmitt trigger for regulator 1

thr

rising voltage threshold

4.0

4.5

5.0

thf

falling voltage threshold

3.5

4.0

4.5

hys

hysteresis

0.5

Schmitt trigger power supply for regulator 2

thr

rising voltage threshold

6.0

6.5

7.1

thf

falling voltage threshold

1.7

1.9

2.2

hys

hysteresis

4.7

Schmitt trigger for enable input

thr

rising voltage threshold

1.7

2.2

2.7

thf

falling voltage threshold

1.5

2.0

2.5

hys

hysteresis

0.2

Schmitt trigger for reset buffer

r(REG2)

rising voltage of regulator 2

note 3

REG2

0.15

f(REG2)

falling voltage of regulator 2

note 3

REG2

0.25

spread

voltage spread on tracking

note 4

Schmitt trigger for ignition buffer

thr

rising voltage threshold

1.7

2.2

2.7

thf

falling voltage threshold

1.5

2.0

2.5

hys

hysteresis

0.2

Reset buffer

sink

LOW-level sink current

RES

0.8 V

leak

leakage current

= 14.4 V; V

RES

= 5 V

100

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

Ignition buffer

LOW-level output voltage

= 0 mA

0.2

0.8

HIGH-level output voltage

note 5

5.0

5.2

LOW-level output current

0.8 V

0.3

0.8

HIGH-level output current

3 V

0.3

2.0

Regulator 1; note 6

REG1

output voltage off

400

REG1

output voltage

0.5 mA

REG1

300 mA

8.65

9.0

9.35

10 V

18 V

8.65

9.0

9.35

REG1

line regulation

10 V

18 V

REGL1

load regulation

0.5 mA

REG1

300 mA

SVRR1

supply voltage ripple rejection f

= 200 Hz; V

= 2 V (p-p)

REGd1

drop-out voltage

REG1

= 300 mA; note 7

0.4

0.5

REGm1

current limit

REG1

> 7 V; note 8

0.45

1.2

REGsc1

short-circuit current

0.5

; note 9

300

cross talk

note 10

Regulator 2; note 11

REG2

output voltage

0.5 mA

REG2

50 mA

4.8

5.0

5.2

7 V

18 V

4.8

5.0

5.2

18 V

50 V

4.75

5.0

5.25

REG2

line regulation

7 V

18 V

REGL2

load regulation

0.5 mA

REG1

30 mA

SVRR2

supply voltage ripple rejection f

= 200 Hz; V

= 2 V (p-p)

REGd2

drop-out voltage

REG2

= 30 mA; note 12

0.3

0.4

REGm2

current limit

REG2

> 4.5 V; note 8

0.1

0.5

REGsc2

short-circuit current

0.5

; note 9

cross talk

note 13

Power switch

swd

drop-out voltage

= 0.3 A; note 14

0.4

0.9

swcc

continuous current

0.5

swcl

clamping voltage

16.9 V

15.0

16.2

peak current

10 ms

1.4

swfb

fly back voltage behaviour

200 mA, V

= 9 V

lim(sw)

current limit

= 14.4 V; V

< 1.5 V;

note 8

0.6

1.0

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

Notes to the characteristics

1. Minimum operating voltage, only if V

has exceeded 6.5 V.

2. Enable and ignition inputs are low and regulator 2 is unloaded.

3. Voltage drop due to load condition.

4. The spread on tracking is one sigma value.

5. Ignition output voltage will be less than or equal to the output voltage of regulator 2.

6. I

REG1

= 5 mA.

7. The drop-out voltage of regulator 1 is measured between V

and REG1.

8. At current limit, I

REGm

is held constant (see Fig.5).

9. The foldback current protection limits the dissipated power at short-circuit (see Figs 5 and 6).

10. The cross talk of regulator 1 is measured with an I

REG2

= 0.5 mA up to 30 mA with an input frequency of f

= 100 kHz.

11. I

REG2

= 5 mA.

12. The drop-out voltage of regulator 2 is measured between V

and REG2.

13. The cross talk of regulator 2 is measured with an I

REG1

= 0.5 mA up to 100 mA with an input frequency of

= 100 kHz.

14. The drop-out voltage of the power switch is measured between V

and V

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

TEST AND APPLICATION INFORMATION

Fig.7 Test circuit (for SOT110-1).

(1) Capacitor not required for stability.

ndbook, full pagewidth

MBE232

regulator 2

regulator 1

enable input

ignition input

reset
output

C3
10

C2
10

220 nF

C4
10

C5
1

ignition
output

47 k

1 k

5 V

8.5 V

R L(sw)

1 k

R L(REG1)

1 k

R L(REG2)

TDA3603

ground

1 k

Ven

VI(ig)

(1)

Noise information

The noise at the output of the regulators depends on the
bandwidth of the regulators, which can be adjusted by the
output capacitors. Table 1 shows the noise figures.

Although stability is guaranteed when C

is higher than

F (over temperature range) with tan (

) = 1 in the

frequency range 1 to 10 kHz, however, for low noise, a
47

F load capacitor is required. When electrolytic

capacitors are used, the capacitor value will decrease and
the ESR will increase much at low temperatures. To avoid
oscillation a normal capacitor of 220 nF can be placed in
parallel with this electrolytic capacitor.

The noise on the supply line depends on the value of the
supply capacitor and is caused by a current noise (output
noise of the regulators is translated into a current noise by
the output capacitors). When a high frequency capacitor of
220 nF with an electrolytic capacitor of 100

F in parallel is

placed directly over pins 1 and 6 (supply and ground) the
noise is minimized.

Table 1

Noise figures

Note

1. Bandwidth of 100 kHz.

REGULATOR

NOISE (

(1)

OUTPUT

CAPACITOR (

180

100

120

100

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

SHORT CIRCUIT BEHAVIOUR OF POWER SWITCH

The short circuit behaviour of the switch with large
inductive loads (switch output goes out of the radio) can be
improved by replacing C2 (see Fig.7) by a larger
electrolytic capacitor of 10

F/16 V. When the temperature

protection of the switch becomes active, due to a short
circuit of the switch, the behaviour will be improved.

When the switch is clamped an minimum output capacitor
of 10

F is needed.

The power switch is not protected against `loss of ground'
condition (= short of the switch to ground with floating
ground pin of the TDA3603 itself). A `loss of ground'
situation can in practice only occur when the switch output
goes outside the car-radio box.

There is an application solution to protect against `loss of
ground' (see Fig.8).

It is advisable to limit the dissipation at short circuit
condition by monitoring the output of the power switch.
The microprocessor can switch of the power switch when
the switch was enabled and the switch output remains low
due to a short circuit condition.

Fig.8 `Loss of ground' protection.

handbook, full pagewidth

MGK595

Vbat (

)

Vbat (

)

Vbat (

)

TDA3603

GND

VSW

switch output

short circuit
to Vbat (

)

radio disconnected
from Vbat (

)

1997 Aug 15

Philips Semiconductors

Product specification

Multiple voltage regulator with switch

TDA3603

SOLDERING

Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

"IC Package Databook" (order code 9398 652 90011).

Soldering by dipping or by wave

The maximum permissible temperature of the solder is
260

C; solder at this temperature must not be in contact

with the joint for more than 5 seconds. The total contact

time of successive solder waves must not exceed
5 seconds.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T

stg max

). If the

printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

Repairing soldered joints

Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300

C it may remain in

contact for up to 10 seconds. If the bit temperature is
between 300 and 400

C, contact may be up to 5 seconds.

DEFINITIONS

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

Data sheet status

Objective specification

This data sheet contains target or goal specifications for product development.

Preliminary specification

This data sheet contains preliminary data; supplementary data may be published later.

Product specification

This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

Internet: http://www.semiconductors.philips.com

Philips Semiconductors a worldwide company

SCA55

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Printed in The Netherlands

547027/1200/03/pp20

Date of release: 1997 Aug 15

Document order number:

9397 750 02229

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TDA3603