PHILIPS TDA3608Q

INTEGRATED CIRCUITS
DATA SHEET
TDA3608Q
Multiple voltage regulator with
switch
Preliminary specification
File under Integrated Circuits, IC01
1997 Aug 14
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
FEATURES
GENERAL DESCRIPTION
General
The TDA3608Q is a multiple output voltage regulator with
a power switch, intended for use in car radios with or
without a microcontroller. It contains:
• Two VP-state controlled regulators (regulator 1 and 3)
and a power switch
• 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.
• Regulator 2 and reset 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
• A power switch with protections, operated by an enable
input
• Low reverse current of regulator 2
• 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.
• 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)
• A supply pin which can withstand load dump pulses and
negative supply voltages
• Adjustable reset delay time
• High ripple rejection
• Regulator 2 that will be switched on at a back-up voltage
higher than 6.5 V and off when the output voltage of
regulator 2 drops below 1.9 V
• Back-up capacitor for regulator 2.
• 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.
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
• 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.
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
TDA3608Q
1997 Aug 14
DBS13P
DESCRIPTION
plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
2
VERSION
SOT141-6
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VP
supply voltage
operating
reverse polarity
non-operating
regulator 2 on
9.5
14.4
18
V
−
−
−18
V
2.4
14.4
50
V
jump start
t ≤ 10 minutes
−
−
30
V
load dump protection
t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
standby mode
−
500
600
µA
−
−
150
°C
Iq(tot)
total quiescent supply current
Tj
junction temperature
Voltage regulators
VO(REG1)
output voltage regulator 1
1 mA ≤ IREG1 ≤ 600 mA
8.15
8.5
8.85
V
VO(REG2)
output voltage regulator 2
0.5 mA ≤ IREG2 ≤ 300 mA; VP = 14.4 V
4.75
5.0
5.25
V
VO(REG3)
output voltage regulator 3
1 mA ≤ IREG3 ≤ 400 mA
4.75
5.0
5.25
V
ISW = 1 A
−
0.45
0.7
V
ISW = 1.8 A
−
1
1.8
V
3
−
−
A
Power switch
Vd
IM
drop-out voltage
peak current
1997 Aug 14
3
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
BLOCK DIAGRAM
handbook, full pagewidth
VP
ENSW
(14.4 V)
POWER SWITCH
1
13
(14.2 V/3 A)
SW
1 A after 10 ms
(short-circuit)
7
TEMPERATURE
LOAD DUMP
PROTECTION
&
BACK-UP SWITCH
12
(14.2 V/100 mA)
BU
BACK-UP CONTROL
11
(5 V/100 mA)
REG2
REGULATOR 2
3
REGULATOR 3
&
(5 V/400 mA)
REG3
4
EN3
2
REGULATOR 1
&
EN1
REG1
6
8
TDA3608Q
CRES
5
9
10
GND
Fig.1 Block diagram.
1997 Aug 14
(8.5 V/600 mA)
4
MGK602
HOLD
RES
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
PINNING
SYMBOL
PIN
DESCRIPTION
handbook, halfpage
VP
1
regulator 1 output
REG1
2
3
regulator 3 output
REG3
3
EN3
4
enable input regulator 3
EN3
4
RES
5
reset output
RES
5
EN1
6
enable input regulator 1
EN1
ENSW
7
enable input power switch
6
HOLD
8
hold output
ENSW
7
CRES
9
reset delay capacitor
HOLD
8
GND
10
ground
CRES
9
VP
1
supply voltage
REG1
2
REG3
REG2
11
regulator 2 output
BU
12
back-up
SW
13
power switch output
TDA3608Q
GND 10
REG2
11
BU 12
SW 13
MGK601
Fig.2 Pin configuration.
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).
FUNCTIONAL DESCRIPTION
The TDA3608Q 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 TDA3608Q.
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 drops 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 power switch can also be controlled by means of a
separate enable input (pin 7) as shown in Fig.3 for the
behaviour of the power switch output.
All output pins are fully protected. The regulators are
protected against load dump (regulators 1 and 3 will
switch off at supply voltages >18 V) and short-circuit
(foldback current protection).
The power 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 (VP ≤ 18 V).
At supply voltages >17 V the power switch is clamped at
maximum 16 V (to avoid external connected circuitry being
damaged by an overvoltage) and the power switch will
switch off at load dump.
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).
When regulator 2 and the supply voltage (VP > 4.5 V) are
both available, regulators 1 and 3 can be operated by
means of enable inputs (pins 6 and 4 respectively).
1997 Aug 14
The total timing diagram is shown in Fig.3.
5
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
handbook, full pagewidth
TDA3608Q
load dump
VP
Vbu
6.5 V
5.4 V
4.0 V
regulator 2
5.0 V
1.9 V
0V
reset
delay
capacitor
reset
5.0 V
3.0 V
0V
6.0 V
Back-up Schmitt trigger and reset behaviour
load dump
18.0 V
VP
9.9 V
4.5 V
4.0 V
≥2.2 V
enable
regulator 1 ≤2.0 V
8.5 V
regulator 1
0V
≥2.2 V
enable
regulator 3 ≤2.0 V
5.0 V
regulator 3
0V
VP and enable Schmitt trigger
load dump
16.9 V
VP
4.5 V
4.0 V
enable
power
switch
power
switch
output
≥2.2 V
≤2.0 V
0V
Power switch behaviour
Fig.3 Timing diagrams.
1997 Aug 14
6
MGK603
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
VP
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
supply voltage
operating
−
18
V
−
−18
V
reverse polarity
non-operating
jump start
t ≤ 10 minutes
−
30
V
load dump protection
t ≤ 50 ms; tr ≥ 2.5 ms
−
50
V
−
62
W
Ptot
total power dissipation
Tstg
storage temperature
non-operating
−55
+150
°C
Tamb
ambient temperature
operating
−40
+85
°C
Tj
junction temperature
operating
−40
+150
°C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
Rth(j-c)
thermal resistance from junction to case
Rth(j-a)
thermal resistance from junction to ambient
1997 Aug 14
CONDITIONS
in free air
7
VALUE
UNIT
2
K/W
50
K/W
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
CHARACTERISTICS
VP = 14.4 V; Tamb = 25 °C; see Fig.6; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VP
supply voltage
operating
Iq
9.5
14.4
18
V
2.4
14.4
18
V
regulator 2 on
note 1
jump start
t ≤ 10 minutes
−
−
30
V
load dump protection
t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
quiescent supply current
VP = 12.4 V; note 2;
IREG2 = 0.1 mA
−
500
600
µA
VP = 14.4 V; note 2;
IREG2 = 0.1 mA
−
520
−
µA
5.0
V
Schmitt trigger power supply for regulator 1, regulator 3 and power switch
Vthr
rising threshold voltage
Vthf
falling threshold voltage
3.5
4.0
4.5
V
Vhys
hysteresis voltage
−
0.5
−
V
4.0
4.5
Schmitt trigger for regulator 2
Vthr
rising threshold voltage
6.0
6.5
7.1
V
Vthf
falling threshold voltage
1.7
1.9
2.2
V
Vhys
hysteresis voltage
−
4.6
−
V
Schmitt trigger for enable input (regulator 1, regulator 3 and power switch)
Vthr
rising threshold voltage
1.7
2.2
2.7
V
Vthf
falling threshold voltage
1.5
2.0
2.5
V
Vhys
hysteresis voltage
IREG = ISW = 1 mA
0.1
0.2
0.5
V
ILI
input leakage current
VEN = 5 V
1
5
10
µA
Schmitt trigger for reset
Vthr
rising threshold voltage of
regulator 2
VP rising; IREG1 = 50 mA;
note 3
−
VREG2 − 0.15
VREG2 − 0.075 V
Vthf
falling threshold voltage
of regulator 2
VP rising; IREG1 = 50 mA;
note 3
4.3
VREG2 − 0.35
−
V
Vhys
hysteresis voltage
0.1
0.2
0.3
V
Schmitt trigger for hold
Vthr
rising threshold voltage of
regulator 1
VP rising; note 3
−
VREG1 − 0.15
VREG1 − 0.075 V
Vthf
falling threshold voltage
of regulator 1
VP rising; note 3
9.2
VREG1 − 0.35
−
V
Vhys
hysteresis voltage
0.1
0.2
0.3
V
1997 Aug 14
8
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
SYMBOL
PARAMETER
TDA3608Q
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Reset and hold buffer
IsinkL
LOW-level sink current
VRES/HOLD ≤ 0.8 V
2
−
−
mA
ILO
output leakage current
VP = 14.4 V; VRES/HOLD = 5 V −
−
2
µA
tr
rise time
note 4
−
7
50
µs
tf
fall time
note 4
−
1
50
µs
Reset delay
Ich
charge current
2
4
8
µA
Idch
discharge current
500
800
−
µA
Vthr
rising threshold voltage
2.5
3.0
3.5
V
td
delay time
20
35
70
ms
C = 47 nF; note 5
Regulator 1 (IREG1 = 5 mA unless otherwise specified)
VO(off)
output voltage off
VO
output voltage
−
1
400
mV
1 mA ≤ IREG1 ≤ 600 mA
8.15
8.5
8.85
V
11 V ≤ VP ≤ 18 V
8.15
8.5
8.85
V
∆V
line regulation
11 V ≤ VP ≤ 18 V
−
2
75
mV
∆VL
load regulation
1 mA ≤ IREG1 ≤ 600 mA
−
20
50
mV
Iq
quiescent current
IREG1 = 600 mA
−
25
60
mA
SVRR
supply voltage ripple
rejection
fi = 3 kHz; Vi(p-p) = 2 V
60
70
−
dB
Vd
drop-out voltage
IREG1 = 550 mA; VP = 8.5 V;
note 6
−
0.4
0.7
V
Im
current limit
VREG1 > 7.5 V; note 7
0.65
1.2
−
A
Isc
short-circuit current
RL ≤ 0.5 Ω; note 8
250
800
−
mA
0.5 mA ≤ IREG2 ≤ 150 mA
4.75
5.0
5.25
V
IREG2 = 300 mA; note 9
4.75
5.0
5.25
V
Regulator 2 (IREG2 = 5 mA unless otherwise specified)
VO
output voltage
∆V
line regulation
∆VL
load regulation
SVRR
supply voltage ripple
rejection
1997 Aug 14
7 V ≤ VP ≤ 18 V
4.75
5.0
5.25
V
18 V ≤ VP ≤ 50 V;
IREG2 ≤ 150 mA
4.75
5.0
5.25
V
6 V ≤ VP ≤ 18 V
−
2
50
mV
18 V ≤ VP ≤ 50 V
−
15
75
mV
1 mA ≤ IREG2 ≤ 150 mA
−
20
50
mV
1 mA ≤ IREG2 ≤ 300 mA
−
−
100
mV
fi = 3 kHz; Vi(p-p) = 2 V
60
70
−
dB
9
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
SYMBOL
Vd
PARAMETER
drop-out voltage
TDA3608Q
CONDITIONS
MIN.
TYP.
MAX.
UNIT
IREG2 = 100 mA;
VP = 4.75 V; note 6
−
0.4
0.6
V
IREG2 = 200 mA;
VP = 5.75 V; note 6
−
0.8
1.2
V
IREG2 = 100 mA;
VBU = 4.75 V; note 10
−
0.2
0.5
V
IREG2 = 200 mA;
VBU = 5.75 V; note 10
−
0.8
1.0
V
Im
current limit
VREG2 > 4.5 V; note 7
0.32
0.37
−
A
Isc
short-circuit current
RL ≤ 0.5 Ω; note 8
20
100
−
mA
−
1
400
mV
Regulator 3 (IREG3 = 5 mA unless otherwise specified)
VO(off)
output voltage off
VO
output voltage
1 mA ≤ IREG3 ≤ 400 mA
4.75
5.0
5.25
V
7 V ≤ VP ≤ 18 V
4.75
5.0
5.25
V
∆V
line regulation
7 V ≤ VP ≤ 18 V
−
2
50
mV
∆VL
load regulation
1 mA ≤ IREG3 ≤ 400 mA
−
20
50
mV
Iq
quiescent current
IREG3 = 400 mA
−
15
40
mA
SVRR
supply voltage ripple
rejection
fi = 3 kHz; Vi(p-p) = 2 V
60
70
−
dB
Vd
drop-out voltage
IREG3 = 400 mA;
VP = 5.75 V; note 6
−
1
1.5
V
Im
current limit
VREG3 > 4.5 V; note 7
0.45
0.70
−
A
Isc
short-circuit current
RL ≤ 0.5 Ω; note 8
100
400
ISW = 1 A; note 11
−
0.45
0.7
V
ISW = 1.8 A; note 11
−
1.0
1.8
V
mA
Power switch
Vd
drop-out voltage
Idc
continuous current
VP = 16 V, VSW = 13.5 V
1.8
2.0
−
A
Vcl
clamping voltage
VP ≥ 17 V
13.5
15.0
16.0
V
IM
peak current
VP = 17 V; notes 12 and 13
3
−
−
A
Vfb
fly back voltage behaviour ISW = −100 mA
−
VP + 3
22
V
Isc
short-circuit current
0.8
−
A
VP = 14.4 V; VSW < 1.2 V;
note 13
Back-up switch
Idc
continuous current
0.3
0.35
−
A
Vcl
clamping voltage
VP ≥ 16.7 V
−
−
16
V
Ir
reverse current
VP = 0; VBU = 12.4 V; note 14 −
−
900
mA
1997 Aug 14
10
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
Notes
1. Minimum operating voltage, only if VP has exceeded 6.5 V.
2. The quiescent current is measured in the standby mode. So, the enable inputs of regulators 1, 3 and the switch are
grounded and RL(REG2) = ∞ (see Fig.6).
3. The voltage of the regulator sinks as a result of a VP drop.
4. The rise and fall time is measured with a 10 kΩ pull-up resistor and a 50 pF load capacitor.
C
3
5. The delay time depends on the value of the capacitor: t d = ------ × V C (th) = C × ( 750 ×10 ) ( ms )
I ch
6. The drop-out voltage of regulators 1, 2 and 3 is measured between VP and REGn.
7. At current limit, IREGmn is held constant (see Fig.4 for behaviour of IREGmn).
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 measured between BU and REG2.
11. The drop-out voltage of the power switch is measured between VP and SW.
12. The maximum output current of the power switch is limited to 1.8 A when the supply voltage exceeds 18 V.
13. At short-circuit, Isc of the power switch is held constant to a lower value than the continuous current after a delay of
at least 10 ms (see Fig.5).
14. The reverse current of the back-up switch is measured when flowing out of pin VP with VP = 0 V.
1997 Aug 14
11
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
handbook, halfpage
TDA3608Q
MGK604
8.5 V
handbook, halfpage
VO(REG2)
VO(REG1)
MGK655
5.0 V
2V
1V
≥300 mA
IREGsc1
IREGsc2 ≥50 mA
IREGm1
IREG1
b. Regulator 2.
a. Regulator 1.
handbook, halfpage
VO(REG3)
MGK656
5.0 V
1V
IREGsc3
≥200 mA
IREGm3
IREG3
c. Regulator 3.
Fig.4 Foldback current protection of the regulators.
handbook, halfpage
MGB758
≥3
Isw
(A)
1.8
t (ms)
≥10
VSW ≥ 5 V.
Fig.5 Current protection of the power switch.
1997 Aug 14
IREGm2
IREG2
12
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
TEST AND APPLICATION INFORMATION
Test information
handbook, full pagewidth
supply voltage
C1
220 nF
VP
power switch output
13
1
(1)
R4
2.2 Ω
enable input power switch
11
7
1 kΩ
C2
220 nF
5V
regulator 2
output
C3
10 µF
VENSW
enable input regulator 1
6
2
RL(REG2)
1 kΩ
regulator 1
output
10 V
C4
10 µF
VEN1
enable input regulator 3
TDA3608Q
4
3
regulator 3
output
RL(REG1)
1 kΩ
5V
C5
10 µF
VEN3
reset delay
capacitor
9
5
C6
1 µF
back-up
R1
1 kΩ
C8
220 nF
RL(REG3)
1 kΩ
R2
10 kΩ
reset
output
C7
47 nF
Vbu
RL(sw)
R3
10 kΩ
hold output
12
8
10
GND
MGK605
(1) Capacitor not required for stability.
Fig.6 Test circuit.
Application information
Table 1
Noise figures
NOISE FIGURE(1)
NOISE
REGULATOR
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). Table 1 shows the noise
figure with the corresponding output capacitor for each
regulator. The noise is minimal when a high frequency
capacitor of 220 nF in parallel with an electrolytic capacitor
of 100 µF is connected directly to pins VP and GND.
1997 Aug 14
CO = 10 µF
CO = 47 µF CO = 100 µF
1
225 µV
150 µV
135 µV
2
225 µV
150 µV
135 µV
3
255 µV
200 µV
180 µV
Note
1. Measured at a bandwidth of 200 kHz.
13
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
decreased to 73 µF and the ESR is increased to 1.1 Ω.
The regulator will remain stable at −30 °C (see Fig.7).
STABILITY
The regulators are made stable with the external
connected output capacitors. The output capacitors can be
selected using the graphs of Figs 7 and 8.
When an electrolytic capacitor is used, the temperature
behaviour of this output capacitor can cause oscillations at
low temperature. The next two examples show how an
output capacitor value is selected.
The regulator 2 is made stable with a 10 µF electrolytic
capacitor (ESR = 3 Ω). At −30 °C the capacitor value is
decreased to 3 µF and the ESR is increased to 23.1 Ω.
The regulator will be instable at −30 °C (see Fig.8).
Example 1
Solution
The regulator 1 is made stable with an electrolytic output
capacitor of 220 µF, Equivalent Series Resistance
(ESR) = 0.15 Ω. At −30 °C the capacitor value is
Use a tantalum capacitor of 10 µF or a larger electrolytic
capacitor. The use of tantalum capacitors is recommended
to avoid problems with stability at low temperatures.
Example 2
handbook, halfpage
handbook, halfpage
MBK099
14
maximum ESR
MBK100
4
R 12
(Ω)
10
maximum ESR
R
(Ω) 3
8
stable region
2
stable region
6
4
1
2
minimum ESR
0
1
10
100
0.22
C (µF)
Fig.7
1
10
100
C (µF)
Curves for selecting value of output
capacitor for regulators 1 and 3.
1997 Aug 14
minimum ESR
0
Fig.8
14
Curves for selecting value of output
capacitor for regulator 2.
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
PACKAGE OUTLINE
DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
SOT141-6
non-concave
Dh
x
D
Eh
view B: mounting base side
d
A2
B
j
E
A
L3
L
Q
c
1
13
e1
Z
e
bp
e2
m
w M
0
5
v M
10 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A2
bp
c
D (1)
d
Dh
E (1)
e
e1
e2
Eh
j
L
L3
m
Q
v
w
x
Z (1)
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
12.2
11.8
3.4
1.7
5.08
6
3.4
3.1
12.4
11.0
2.4
1.6
4.3
2.1
1.8
0.8
0.25
0.03
2.00
1.45
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
92-11-17
95-03-11
SOT141-6
1997 Aug 14
EUROPEAN
PROJECTION
15
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
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 (Tstg 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.
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.
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.
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.
DEFINITIONS
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.
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.
1997 Aug 14
16
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
NOTES
1997 Aug 14
17
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
NOTES
1997 Aug 14
18
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
NOTES
1997 Aug 14
19
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Internet: http://www.semiconductors.philips.com
© Philips Electronics N.V. 1997
SCA55
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
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
under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
547027/1200/01/pp20
Date of release: 1997 Aug 14
Document order number:
9397 750 02238