1997 Aug 15

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

-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 V

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

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

PINNING

SYMBOL

PIN

DESCRIPTION

supply voltage

REG1

regulator 1 output

REG3

regulator 3 output

EN3

enable input regulator 3

IGN2

ignition 2 input

IGN1

ignition 1 input

IGN1

OUT

ignition 1 output (active LOW)

IGN2

OUT

ignition 2 output

RES

reset output

EN1

enable input regulator 1

ENSW

enable input power switch

HOLD

hold output

RES

reset delay capacitor

GND

ground

REG2

regulator 2 output

back-up

power switch output

Fig.2 Pin configuration.

handbook, halfpage

TDA3609JR

MGK606

REG1

REG3

EN3

IGN2IN

IGN1IN

IGN1OUT

IGN2OUT

RES

EN1

ENSW

HOLD

CRES

GND

REG2

FUNCTIONAL DESCRIPTION

The TDA3609JR 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 in the TDA3609JR.

Regulator 2 will switch on when the back-up 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 far 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 a
external capacitor at pin 13. The above mentioned start-up
feature is built-in to secure a smooth start-up of the
microcontroller at first connection, without uncontrolled
switching of regulator 2 during the start-up sequence.

The charge of the back-up capacitor can be used to supply
regulator 2 for a short period when the supply falls down
to 0 V (time depends on value of storage capacitor).

The output stages (regulator 1 and 3) of this regulator have
extreme low noise behaviour and good stability. Using
small output capacitors regulator 1 and 3 are made stable.

When both regulator 2 and the supply voltage (V

> 4.5 V)

are available, regulators 1 and 3 can be operated by
means of enable inputs (pins 10 and 4 respectively).

Regulator 1 has a hold output (open collector) indicating
that the output voltage of this regulator is settled (held
HIGH by external pull-up resistor). When the output
voltage of this regulator drops out of regulation (because
of supply voltage drop or high load) the hold output will go
LOW. The hold output signal is only valid when regulator 1
is enabled by its enable input (pin 10).

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

The power switch can also be controlled by means of a
separate enable input (pin 11).

All output pins are fully protected. The regulators are
protected against load dump (regulator 1 and 3 will switch
off at supply voltages >18 V) and short-circuit (foldback
current protection).

The switch contains a current protection, but this
protection is delayed at short-circuit condition for at least
10 ms. During this time the output current is limited to a
peak value of at least 3 A and 2 A continuous (V

18 V).

At supply voltages >17 V the switch is clamped at
maximum 16 V (to avoid external connected circuitry being
damaged by an overvoltage) and the switch will switch off
at load dump.

By means of two independent ignition Schmitt triggers and
ignition output buffers (one open collector and one
push-pull output), interfacing with the microcontroller can
be accomplished (simple full/semi on/off logic
applications). The ignition 1 output is inverted.

The total timing diagrams are shown in Figs 3 and 4.

Fig.3 Timing diagram ignition Schmitt triggers.

handbook, full pagewidth

load dump

ignition 1

input

ignition 1

output

ignition 2

input

ignition 2

output

7.0 V
4.5 V

3.25 V

100 V

5.0 V

50 V

1.1 V

2.2 V

100 V

5.0 V

50 V

2.0 V

Enable Schmitt trigger ignition 1

Enable Schmitt trigger ignition 2

MGK611

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

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

14.4

regulator 2 on

note 1

2.4

14.4

jump start

10 minutes

load dump protection

50 ms; t

2.5 ms

quiescent supply current

= 12.4 V; note 2;

REG2

= 0.1 mA

500

600

= 14.4 V; note 2;

REG2

= 0.1 mA

520

Schmitt trigger power supply for switch, regulator 1 and regulator 3

thr

rising threshold voltage

6.5

7.0

7.5

thf

falling threshold voltage

4.0

4.5

5.0

hys

hysteresis voltage

2.1

2.5

3.3

Schmitt trigger for regulator 2

thr

rising threshold voltage

6.0

6.5

7.1

thf

falling threshold voltage

1.7

1.9

2.2

hys

hysteresis voltage

4.6

Schmitt trigger for enable input (regulator 1, regulator 3 and switch)

thr

rising threshold voltage

1.7

2.2

2.7

thf

falling threshold voltage

1.5

2.0

2.5

hys

hysteresis voltage

REG

= I

= 1 mA

0.1

0.2

0.5

input leakage current

= 5 V

Reset trigger level

thr

rising threshold voltage of
regulator 2

rising; I

REG1

= 50 mA;

note 3

4.5

REG2

0.15

REG2

0.1

Schmitt trigger for hold

thr

rising threshold voltage of
regulator 1

rising; note 3

REG1

0.15

REG1

0.075

thf

falling threshold voltage of
regulator 1

falling; note 3

9.2

REG1

0.35

hys

hysteresis voltage

0.1

0.2

0.3

Reset and hold buffer

sinkL

LOW-level sink current

RES/HOLD

0.8 V

output leakage current

= 14.4 V;

RES/HOLD

= 5 V

0.1

rise time

note 4

fall time

note 4

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

Reset delay

charge current

dch

discharge current

500

800

thr

rising voltage threshold

2.5

3.0

3.5

delay time

C = 47 nF; note 5

Regulator 1 (I

REG1

= 5 mA unless otherwise specified)

O(off)

output voltage off

400

O(REG1)

output voltage

1 mA

REG1

600 mA

9.5

10.0

10.5

12 V

18 V

9.5

10.0

10.5

line regulation

12 V

18 V

load regulation

1 mA

REG1

600 mA

100

quiescent current

= 600 mA

SVRR

supply voltage ripple
rejection

= 3 kHz; V

i(p-p)

= 2 V

drop-out voltage

REG1

= 550 mA;

= 9.5 V; note 6

0.4

0.7

REGm1

current limit

REG1

> 8.5 V; note 7

0.65

1.2

REGsc1

short-circuit current

0.5

; note 8

250

800

Regulator 2 (I

REG2

= 5 mA unless otherwise specified)

O(REG2)

output voltage

0.5 mA

REG2

150 mA

4.75

5.0

5.25

REG2

= 300 mA; note 9

4.75

5.0

5.25

8 V

18 V

4.75

5.0

5.25

18 V

50 V;

REG2

150 mA

4.75

5.0

5.25

line regulation

6 V

18 V

6 V

50 V

load regulation

1 mA

REG2

150 mA

1 mA

REG2

300 mA

100

SVRR

supply voltage ripple
rejection

f = 3 kHz; V

i(p-p)

= 2 V

drop-out voltage

REG2

= 100 mA;

= 4.75 V; note 6

0.4

0.6

REG2

= 200 mA;

= 5.75 V; note 6

0.8

1.2

REG2

= 100 mA;

= 4.75 V; note 10

0.2

0.5

REG2

= 200 mA;

= 5.75 V; note 10

0.8

1.0

REGm2

current limit

REG2

> 4.5 V; note 7

0.32

0.37

REGsc2

short-circuit current

0.5

; note 8

100

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

Regulator 3 (I

REG3

= 5 mA unless otherwise specified)

O(off)

output voltage off

400

O(REG3)

output voltage

1 mA

REG3

500 mA

4.75

5.0

5.25

7 V

18 V

4.75

5.0

5.25

line regulation

7 V

18 V

load regulation

1 mA

REG3

500 mA

quiescent current

= 500 mA

SVRR

supply voltage ripple
rejection

= 3 kHz; V

i(p-p)

= 2 V

drop-out voltage

REG3

= 500 mA;

= 5.75 V; note 6

1.5

REGm3

current limit

REG3

> 4.5 V; note 7

0.60

0.80

REGsc3

short-circuit current

0.5

; note 8

100

400

Power switch

drop-out voltage

= 1 A; V

= 13.5 V;

note 11

0.6

0.85

= 1.8 A; V

= 13.5 V;

note 11

1.4

1.9

continuous current

= 16 V; V

= 13.5 V

1.8

2.0

clamping voltage

17 V

13.5

15.0

16.0

peak current

= 17 V; notes 12 and 13

fly back voltage behaviour

100 mA

+ 3

short-circuit current

= 14.4 V; V

< 1.2 V;

note 13

0.8

Back-up switch

continuous current

0.3

0.35

clamping voltage

16.7 V

reverse current

= 0 V; V

= 12.4 V

900

Schmitt trigger for enable input of ignition 1

thr

rising threshold voltage of
ignition 1 input

2.75

3.25

3.75

thf

falling threshold voltage of
ignition 1 input

0.8

1.3

hys

hysteresis voltage

1.5

input leakage current

IGN1in

= 5 V

1.0

I(clamp)

input clamping current

IGN1in

> 50 V

IH(clamp)

HIGH-level input clamping
voltage

IL(clamp)

LOW-level input clamping
voltage

0.6

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

Schmitt trigger power supply for ignition 1

thr

rising threshold voltage

6.5

7.0

7.5

thf

falling threshold voltage

note 14

4.0

4.5

5.0

Ignition 1 buffer

LOW-level output voltage

IGN1out

= 0 mA

0.2

0.8

LOW-level output current

IGN1out

0.8 V

0.45

0.8

output leakage current

IGN1out

= 5 V; V

IGN1in

= 0 V

1.0

PLH

LOW-to-HIGH
propagation time

IGN1in

rising from

0.8 V to 3.75 V

500

PHL

HIGH-to-LOW
propagation time

IGN1in

falling from

3.75 V to 0.8 V

500

Schmitt trigger for enable input of ignition 2

thr

rising threshold voltage of
ignition 2 input

> 3.5 V

1.9

2.2

2.5

thf

falling threshold voltage of
ignition 2 input

> 3.5 V

1.7

2.0

2.3

hys

hysteresis voltage

> 3.5 V

0.1

0.2

0.5

input leakage current

IGN2in

= 5 V

1.0

I(clamp)

input clamp current

IGN2in

> 50 V

IH(clamp)

HIGH-level input clamping
voltage

IL(clamp)

LOW-level input clamping
voltage

0.6

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

Notes

1. Minimum operating voltage, only if V

has exceeded 6.5 V.

2. The quiescent current is measured in the standby mode. So, the enable inputs of regulator 1, 3 and the power switch

are grounded and R

L(REG2)

(see Fig.7).

3. The voltage of the regulator sinks as a result of a V

drop.

4. The rise and fall time is measured with a 10 k

pull-up resistor and a 50 pF load capacitor.

5. The delay time depends on the value of the capacitor:

6. The drop-out voltage of regulators 1, 2 and 3 is measured between V

and REGn.

7. At current limit, I

REGmn

is held constant (see Fig.5 for behaviour of I

REGmn

8. The foldback current protection limits the dissipated power at short-circuit (see Fig.5).

9. The peak current of 300 mA can only be applied for short periods (t < 100 ms).

10. The drop-out voltage measured between BU and REG2.

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

and SW.

12. The maximum output current of the switch is limited to 1.8 A when the supply voltage exceeds 18 V.

A test-mode is built-in. The delay time of the switch will be disabled when a voltage of V

+ 1 V is applied to the

switch-enable input.

13. At short-circuit, I

of the power switch is held constant to a lower value than the continuous current after a delay of

at least 10 ms. A test-mode is built-in. The delay time of the switch will be disabled when a voltage of V

+ 1 V is

applied to the switch-enable input.

14. V

IGN1out

= LOW for V

IGN1out

> 1.2 V or V

EN1

> 1.3 V or V

EN3

> 1.3 V or V

ENSW

> 1.3 V.

Ignition 2 buffer

LOW-level output voltage

IGN2out

= 0 mA

0.2

0.8

HIGH-level output voltage

IGN2out

= 0 mA

4.5

5.0

5.25

LOW-level output current

IGN2out

0.8 V

0.45

0.8

HIGH-level output current

IGN2out

4.5 V

0.45

2.0

output leakage current
(source)

IGN1out

= 5 V; V

IGN1in

= 0 V

1.0

PLH

LOW-to-HIGH
propagation time

IGN2in

rising from

1.7 V to 2.5 V

500

PHL

HIGH-to-LOW
propagation time

IGN2in

falling from

2.5 V to 1.7 V

500

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

------

C(th)

750

(

)

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

Application information

OISE

Table 1

Noise figures

Note

1. Measured at a bandwidth of 200 kHz.

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
means of the output capacitors). When a high frequency
capacitor of 220 nF in parallel with an electrolytic capacitor
of 100

F is connected directly to pins 1 and 14 (supply

and ground) the noise is minimal.

TABILITY

The regulators are made stable with the external
connected output capacitors.

REGULATOR

NOISE FIGURE (

(1)

= 10

= 47

= 100

tbf

150

tbf

150

tbf

200

tbf

The output capacitors can be selected using the graphs of
Figs 8 and 9. When an electrolytic capacitor is used, the
temperature behaviour of this output capacitor can cause
oscillations at a low temperature. The next 2 examples
show how an output capacitor value is selected.

Example 1

Regulators 1 and 3 are made stable with an electrolytic
output capacitor of 220

F (ESR = 0.15

). At

C the

capacitor value is decreased to 73

F and the ESR is

increased to 1.1

. The regulator will remain stable at

Example 2

Regulator 2 is made stable with a 10

F electrolytic

capacitor (ESR = 3

). At

C the capacitor value is

decreased to 3

F and the ESR is increased to 23.1

Using Fig.9, the regulator will be instable at

Solution

Use a tantalum capacitor of 10

F or a larger electrolytic

capacitor. To avoid problems with stability at low
temperatures, the use of tantalum capacitors is
recommended.

handbook, halfpage

0.1

C (

MGK612

stable region

maximum ESR

100

(

)

Fig.8

Curve for selecting the value of output
capacitor for regulators 1 and 3.

handbook, halfpage

0.22

C (

MGK613

stable region

maximum ESR

minimum ESR

100

(

)

Fig.9

Curve for selecting the value of output
capacitor for regulator 2.

1997 Aug 15

Philips Semiconductors

Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TDA3609JR

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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without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
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Tel. +61 2 9805 4455, Fax. +61 2 9805 4466

Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 160 1010,
Fax. +43 160 101 1210

Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6,
220050 MINSK, Tel. +375 172 200 733, Fax. +375 172 200 773

Belgium: see The Netherlands

Brazil: see South America

Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor,
51 James Bourchier Blvd., 1407 SOFIA,
Tel. +359 2 689 211, Fax. +359 2 689 102

Canada: PHILIPS SEMICONDUCTORS/COMPONENTS,
Tel. +1 800 234 7381

China/Hong Kong: 501 Hong Kong Industrial Technology Centre,
72 Tat Chee Avenue, Kowloon Tong, HONG KONG,
Tel. +852 2319 7888, Fax. +852 2319 7700

Colombia: see South America

Czech Republic: see Austria

Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S,
Tel. +45 32 88 2636, Fax. +45 31 57 0044

Finland: Sinikalliontie 3, FIN-02630 ESPOO,
Tel. +358 9 615800, Fax. +358 9 61580920

France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex,
Tel. +33 1 40 99 6161, Fax. +33 1 40 99 6427

Germany: Hammerbrookstraße 69, D-20097 HAMBURG,
Tel. +49 40 23 53 60, Fax. +49 40 23 536 300

Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS,
Tel. +30 1 4894 339/239, Fax. +30 1 4814 240

Hungary: see Austria

India: Philips INDIA Ltd, Band Box Building, 2nd floor,
254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025,
Tel. +91 22 493 8541, Fax. +91 22 493 0966

Indonesia: see Singapore

Ireland: Newstead, Clonskeagh, DUBLIN 14,
Tel. +353 1 7640 000, Fax. +353 1 7640 200

Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053,
TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007

Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3,
20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557

Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108,
Tel. +81 3 3740 5130, Fax. +81 3 3740 5077

Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL,
Tel. +82 2 709 1412, Fax. +82 2 709 1415

Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,
Tel. +60 3 750 5214, Fax. +60 3 757 4880

Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,
Tel. +9-5 800 234 7381

Middle East: see Italy

Printed in The Netherlands

547027/1200/01/pp20

Date of release: 1997 Aug 15

Document order number:

9397 750 02248

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