Document Outline
- FEATURES
- PROTECTIONS
- GENERAL DESCRIPTION
- ORDERING INFORMATION
- QUICK REFERENCE DATA
- BLOCK DIAGRAM
- PINNING
- FUNCTIONAL DESCRIPTION
- LIMITING VALUES
- THERMAL CHARACTERISTICS
- CHARACTERISTICS
- TEST AND APPLICATION INFORMATION
- Test information
- Application information
- PACKAGE OUTLINE
- SOLDERING
- DEFINITIONS
- LIFE SUPPORT APPLICATIONS
DATA SHEET
Preliminary specification
Supersedes data of 1995 Nov 20
File under Integrated Circuits, IC01
1997 Jul 09
INTEGRATED CIRCUITS
TDA3605Q
Multiple voltage regulator with
switch
1997 Jul 09
2
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
FEATURES
Two V
P
-state controlled regulators (regulator 1 and
regulator 3) and a power switch
Regulator 2, reset and ignition buffer operates 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 (operating from
11 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.
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 protection
Local thermal protection for power switch
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
P
.
GENERAL DESCRIPTION
The TDA3605Q is a multiple output voltage regulator with
a power switch, intended for use in car radios with or
without a microcontroller. It contains:
1. 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.
2. A power switch with protections, operated by an
enable input.
3. Reset and hold outputs 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.
4. A supply pin which can withstand load dump pulses
and negative supply voltage.
5. Regulator 2 will be switched on at a supply voltage
>6.5 V and off at a voltage of regulator 2 <1.9 V.
6. Also there is 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.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA3605Q
DBS13P
plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
SOT141-6
1997 Jul 09
3
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
V
P
supply voltage
operating
11
14.4
18
V
reverse battery
-
18
-
-
V
regulator 2 on
2.4
14.4
18
V
jump start
t
10 minutes
-
-
30
V
load dump protection
during
50 ms; t
r
2.5 ms
-
-
50
V
I
q(tot)
total quiescent supply current standby mode
-
500
600
A
T
j
junction temperature
-
-
150
C
Voltage regulators
V
REG1
output voltage regulator 1
0.5 mA
I
REG1
600 mA
9.5
10.0
10.5
V
V
REG2
output voltage regulator 2
0.5 mA
I
REG2
300 mA; V
P
= 14.4 V 4.75
5.0
5.25
V
V
REG3
output voltage regulator 3
0.5 mA
I
REG3
400 mA
4.75
5.0
5.25
V
Power switch
V
sw(d)
drop-out voltage
I
sw
= 1 A
-
0.45
0.7
V
I
sw
= 1.8 A
-
1
1.8
V
I
swM
peak current
3
-
-
A
1997 Jul 09
4
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
MGB753
REGULATOR 2
REGULATOR 3
REGULATOR 1
13
12
5
TEMPERATURE
LOAD DUMP
PROTECTION
1
7
4
6
9
10
POWER SWITCH
BACK-UP SWITCH
BACK-UP CONTROL
&
&
&
GND
(14.4 V)
TDA3605Q
RES
REG2
REG3
REG1
(14.2 V/3 A)
(14.2 V/100 mA)
(5 V/100 mA)
(5 V/400 mA)
(10 V/600 mA)
Vsw
VP
Ven(sw)
Ven3
Ven1
VC
Vbu
Vhold
1 A after 10 ms
(short-circuit)
8
2
3
11
1997 Jul 09
5
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
PINNING
SYMBOL
PIN
DESCRIPTION
V
P
1
supply voltage
REG1
2
regulator 1 output
REG3
3
regulator 3 output
V
en3
4
enable input regulator 3
RES
5
reset output voltage
V
en1
6
enable input regulator 1
V
en(sw)
7
enable input power switch
V
hold
8
hold output
V
C
9
reset delay capacitor
GND
10
ground (0 V)
REG2
11
regulator 2 output
V
bu
12
back-up
V
sw
13
power switch output voltage
Fig.2 Pin configuration.
handbook, halfpage
TDA3605Q
MGB752
1
2
3
4
5
6
7
8
9
10
11
12
13
VP
REG1
REG3
Ven3
Ven1
Ven(sw)
Vhold
REG2
RES
Vsw
Vbu
VC
GND
FUNCTIONAL DESCRIPTION
The TDA3605Q 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 TDA3605Q.
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 an external capacitor at pin 9. 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 to 0 V
(time depends on value of storage capacitor). When both
regulator 2 and the supply voltage (V
P
> 4.5 V) are
available, regulators 1 and 3 can be operated by means of
enable inputs (pins 6 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) and 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 6).
The power switch can also be controlled by means of a
separate enable input (pin 7).
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 (DC) (V
P
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.
The total timing of a semi on/off logic set is shown in Fig.3.
1997 Jul 09
6
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
Fig.3 Timing diagram.
handbook, full pagewidth
VP
Vbu
regulator 2
reset
delay
capacitor
reset
VP
enable
regulator 1
regulator 1
regulator 3
enable
regulator 3
VP
enable
power
switch
power
switch
output
6.5 V
5.4 V
4.0 V
5.0 V
1.9 V
0 V
5.0 V
0 V
18.0 V
10.4 V
4.5 V
4.0 V
2.2 V
10.0 V
0 V
load dump
5.0 V
0 V
16.9 V
4.5 V
4.0 V
0 V
3.0 V
6.0 V
2.0 V
2.2 V
2.0 V
2.2 V
2.0 V
load dump
load dump
MGB759
Switch behaviour
VP and enable Schmitt-trigger
Back-up Schmitt-trigger and reset behaviour
1997 Jul 09
7
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
CHARACTERISTICS
V
P
= 14.4 V; T
amb
= 25
C; see Fig.6; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
supply voltage
operating
-
18
V
jump start
t
10 minutes
-
30
V
load dump protection
during
50 ms; t
r
2.5 ms
-
50
V
V
P
reverse battery voltage
non-operating
-
-
18
V
P
tot
total power dissipation
-
62
W
T
stg
storage temperature
non-operating
-
55
+150
C
T
amb
ambient temperature
operating
-
40
+85
C
T
j
junction temperature
operating
-
40
+150
C
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-c
thermal resistance from junction to case
2
K/W
R
th j-a
thermal resistance from junction to ambient in free air
50
K/W
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
V
P
supply voltage
operating
11
14.4
18
V
regulator 2 on
note 1
2.4
14.4
18
V
jump start
t
10 minutes
-
-
30
V
load dump protection
during
50 ms;
t
r
2.5 ms
-
-
50
V
I
q
quiescent current
V
P
= 12.4 V; note 2;
I
R2
= 0.1 mA
-
500
600
A
V
P
= 14.4 V; note 2;
I
R2
= 0.1 mA
-
520
-
A
Schmitt-trigger power supply for switch, regulator 1 and regulator 3
V
thr
rising voltage threshold
4.0
4.5
5.0
V
V
thf
falling voltage threshold
3.5
4.0
4.5
V
V
hys
hysteresis
-
0.5
-
V
Schmitt-trigger power supply for regulator 2
V
thr
rising voltage threshold
6.0
6.5
7.1
V
V
thf
falling voltage threshold
1.7
1.9
2.2
V
V
hys
hysteresis
-
4.6
-
V
1997 Jul 09
8
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
Schmitt-trigger for enable input (regulator 1, regulator 3 and switch)
V
thr
rising voltage threshold
1.7
2.2
2.7
V
V
thf
falling voltage threshold
1.5
2.0
2.5
V
V
hys
hysteresis
I
REG
= I
SW
= 1 mA
0.1
0.2
0.5
V
I
LI
input leakage current
V
en
= 5 V
1
5
10
A
Schmitt-trigger for reset buffer
V
thr
rising voltage threshold
of regulator 2
V
P
rising;
I
REG1
= 50 mA; note 3
-
V
REG2
-
0.15 V
REG2
-
0.075
V
V
thf
falling voltage threshold
of regulator 2
V
P
rising;
I
REG1
= 50 mA; note 3
4.3
V
REG2
-
0.35
-
V
V
hys
hysteresis
0.1
0.2
0.3
V
Schmitt-trigger for hold
V
thr
rising voltage threshold
of regulator 1
V
P
rising; note 3
-
V
REG1
-
0.15 V
REG1
-
0.075
V
V
thf
falling voltage threshold
of regulator 1
V
P
rising; note 3
9.2
V
REG1
-
0.35
-
V
V
hys
hysteresis
0.1
0.2
0.3
V
Reset and hold buffer
I
Lsink
LOW level sink current
V
RES/hold
0.8 V
2
-
-
mA
I
LO
output leakage current
V
P
= 14.4 V;
V
RES/hold
= 5 V
-
16
32
A
t
r
rise time
note 4
-
7
50
s
t
f
fall time
note 4
-
1
50
s
Reset delay
I
ch
charge current
2
4
8
A
I
dch
discharge current
500
800
-
A
V
thr
rising voltage threshold
2.5
3.0
3.5
V
t
d
delay time
C = 47 nF; note 5
20
35
70
ms
Regulator 1 (I
REG1
= 5 mA)
V
REG1(off)
output voltage off
-
1
400
mV
V
REG1
output voltage
1 mA
I
REG1
600 mA
9.5
10.0
10.5
V
11 V
V
P
18 V
9.5
10.0
10.5
V
V
REG1
line regulation
11 V
V
P
18 V
-
2
75
mV
V
REGL1
load regulation
1 mA
I
REG1
600 mA
-
20
50
mV
I
q
quiescent current
I
R1
= 600 mA
-
25
60
mA
SVRR1
supply voltage ripple
rejection
f
i
= 3 kHz; V
i(p-p)
= 2 V
60
70
-
dB
V
REGd1
drop-out voltage
I
REG1
= 550 mA;
V
P
= 9.5 V; note 6
-
0.4
0.7
V
I
REGm1
current limit
V
REG1
> 8.5 V; note 7
0.65
1.2
-
A
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1997 Jul 09
9
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
I
REGsc1
short-circuit current
R
L
0.5
; note 8
250
800
-
mA
Regulator 2 (I
REG2
= 5 mA)
V
REG2
output voltage
0.5 mA
I
REG2
150 mA 4.75
5.0
5.25
V
0.5 mA
I
REG2
300 mA
4.75
5.0
5.25
V
7 V
V
P
18 V
4.75
5.0
5.25
V
18 V
V
P
50 V;
I
REG2
150 mA
4.75
5.0
5.25
V
V
REG2
line regulation
6 V
V
P
18 V
-
2
50
mV
6 V
V
P
50 V
-
15
75
mV
V
REGL2
load regulation
1 mA
I
REG2
150 mA
-
20
50
mV
1 mA
I
REG2
300 mA
-
-
100
mV
SVRR2
supply voltage ripple
rejection
f = 3 kHz; V
i(p-p)
= 2 V
60
70
-
dB
V
REGd2
drop-out voltage
I
REG2
= 100 mA;
V
P
= 4.75 V; note 6
-
0.4
0.6
V
I
REG2
= 200 mA;
V
P
= 5.75 V; note 6
-
0.8
1.2
V
I
REG2
= 100 mA;
V
bu
= 4.75 V; note 7
-
0.2
0.5
V
I
REG2
= 200 mA;
V
bu
= 5.75 V; note 7
-
0.8
1.0
V
I
REGm2
current limit
V
REG2
> 4.5 V; note 7
0.32
0.37
-
A
I
REGsc2
short-circuit current
R
L
0.5
; note 8
20
100
-
mA
Regulator 3 (I
REG3
= 5 mA)
V
REG3(off)
output voltage off
-
1
400
mV
V
REG3
output voltage
1 mA
I
REG3
400 mA
4.75
5.0
5.25
V
7 V
V
P
18 V
4.75
5.0
5.25
V
V
REG3
line regulation
7 V
V
P
18 V
-
2
50
mV
V
REGL3
load regulation
1 mA
I
REG3
400 mA
-
20
50
mV
I
q
quiescent current
I
R3
= 400 mA
-
15
40
mA
SVRR3
supply voltage ripple
rejection
f
i
= 3 kHz; V
i(p-p)
= 2 V
60
70
-
dB
V
REGd3
drop-out voltage
I
REG3
= 400 mA;
V
P
= 5.75 V; note 6
-
1
1.5
V
I
REGm3
current limit
V
REG3
> 4.5 V; note 7
0.45
0.70
-
A
I
REGsc3
short-circuit current
R
L
0.5
; note 8
100
400
mA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1997 Jul 09
10
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
Notes
1. Minimum operating voltage, only if V
P
has exceeded 6.5 V.
2. The quiescent current is measured in the standby mode. So, the enable inputs of regulators 1 and 3 and the switch
are grounded and R2 =
(see Fig.6).
3. The voltage of the regulator sinks as a result of a V
P
drop.
4. The rise and fall times are 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
P
and V
REGn
.
7. At current limit, I
REGmn
is held constant (see Fig.4 for behaviour of I
REGmn
).
8. The foldback current protection limits the dissipated power at short-circuit (see Fig.4).
9. The peak current of 300 mA can only be applied for short periods (t
<
100 ms).
10. The drop-out voltage of the power switch is measured between V
P
and V
sw
.
11. 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
P
+ 1 V is applied to the switch
enable input.
12. At short circuit, I
sw(sc)
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
P
+ 1 V is
applied to the switch enable input.
Power switch
V
swd
drop-out voltage
I
sw
= 1 A; note 10
-
0.45
0.7
V
I
sw
= 1.8 A; note 10
-
1.0
1.8
V
I
sw(dc)
continuous current
V
P
=
16 V; V
SW
= 13.5 V
1.8
2.0
-
A
V
swcl
clamping voltage
V
P
17 V
13.5
15.0
16.0
V
I
swM
peak current
V
P
=
17 V;
notes 11 and 12
3
-
-
A
V
swfb
fly back voltage
behaviour
I
sw
=
-
100 mA
-
V
P
+ 3
22
V
I
sw(sc)
short-circuit current
V
P
= 14.4 V; V
sw
1.2 V;
note 12
-
0.8
-
A
Back-up switch
I
bu(DC)
continuous current
0.3
0.35
-
A
V
bucl
clamping voltage
V
P
16.7 V
-
-
16
V
V
r
reverse current
V
P
= 0 V; V
bu
= 12.4 V
-
-
900
ms
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
t
d
C
I
ch
-------
V
C th
( )
C
750
3
10
(
)
(ms)
=
=
1997 Jul 09
11
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
Fig.4 Foldback current protection of the regulators.
a. Regulator 1.
b. Regulator 2.
c. Regulator 3.
handbook, halfpage
300 mA
MGB755
9 V
2 V
VREG1
IREGsc1
IREG1
IREGm1
handbook, halfpage
50 mA
MGB756
5.0 V
1 V
VREG2
IREGsc2
IREG2
IREGm2
handbook, halfpage
200 mA
MGB757
5.0 V
1 V
VREG3
IREGsc3
IREG3
IREGm3
Fig.5 Current protection of the power switch.
handbook, halfpage
MGB758
3
10
1.8
t (ms)
Isw
(A)
V
SW
5 V.
1997 Jul 09
12
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
TEST AND APPLICATION INFORMATION
Test information
Fig.6 Test circuit.
(1) Capacitor not required for stability.
handbook, full pagewidth
MGB754
regulator 2
regulator 1
enable input power switch
enable input regulator 3
back-up
capacitor
reset
capacitor
reset
output
C3
10
F
C2
220 nF
C1
220 nF
C4
10
F
hold
output
R1
1 k
R3
10 k
R2
10 k
1 k
1 k
5 V
5 V
10 V
regulator 3
C5
10
F
C6
1
F
C8
220 nF
C7
47 nF
RL(sw)
RL(REG2)
1 k
RL(REG1)
1 k
RL(REG3)
Vsw
13
11
2
8
5
3
4
12
9
7
1
10
TDA3605Q
GND
VP
VP
Ven(sw)
Ven3
enable input regulator 1
6
Ven1
Vbu
(1)
Application information
N
OISE
Table 1
Noise figures
Note
1. Measured at a bandwidth of 200 kHz.
REGULATOR
NOISE FIGURE (
V)
(1)
at OUTPUT CAPACITOR
10
F
47
F
100
F
1
-
150
-
2
-
150
-
3
-
200
-
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 3 and 8 (supply and ground) the noise is minimal.
S
TABILITY
The regulators are made stable with the externally
connected output capacitors. The value of the output
capacitors can be selected by referring to the graphs
illustrated in Figs 7 and 8.
1997 Jul 09
13
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
When an electrolytic capacitor is used the temperature
behaviour of this output capacitor can cause oscillations at
cold temperature.
The following two examples explain how an output
capacitor value is selected.
Example 1
Regulator 1 is made stable with an electrolytic output
capacitor of 220
F (ESR = 0.15
). At
-
30
C the
capacitor value is decreased to 73
F and the ESR is
increased to 1.1
. The regulator will remain stable at
-
30
C.
Example 2
Regulator 2 is made stable with a 10
F electrolytic
capacitor (ESR = 3
). At
-
30
C the capacitor value is
decreased to 3
F and the ESR is increased to 23.1
.
The regulator will be unstable at
-
30
C (see Fig.7).
Solution
Use a tantalum capacitor of 10
F or a large electrolytic
capacitor. The use of tantalum capacitors is recommended
to avoid problems with stability at cold temperatures.
Fig.7
Curve for selecting the value of output
capacitor for regulator 2.
handbook, halfpage
2
0
0.22
1
10
C (
F)
MBK099
4
6
8
10
12
stable region
maximum ESR
minimum ESR
100
R
(
)
14
Fig.8
Curve for selecting the value of output
capacitor for regulators 1 and 3.
handbook, halfpage
1
0
1
10
C (
F)
MBK100
2
3
4
stable region
maximum ESR
minimum ESR
100
R
(
)
1997 Jul 09
14
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
PACKAGE OUTLINE
UNIT
A
e
1
A
2
b
p
c
D
(1)
E
(1)
Z
(1)
d
e
D
h
L
L
3
m
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
mm
17.0
15.5
4.6
4.2
0.75
0.60
0.48
0.38
24.0
23.6
20.0
19.6
10
3.4
v
0.8
12.2
11.8
1.7
e
2
5.08
2.4
1.6
E
h
6
2.00
1.45
2.1
1.8
3.4
3.1
4.3
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
12.4
11.0
SOT141-6
0
5
10 mm
scale
Q
j
0.25
w
0.03
x
D
L
E
A
c
A
2
m
L
3
Q
w
M
b
p
1
d
D
Z
e
2
e
e
x
h
1
13
j
Eh
non-concave
view B: mounting base side
92-11-17
95-03-11
DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
SOT141-6
v
M
B
1997 Jul 09
15
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3605Q
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
Philips Electronics N.V. 1997
SCA55
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Printed in The Netherlands
547027/1200/02/pp16
Date of release: 1997 Jul 09
Document order number:
9397 750 02236
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