TDA3608Q [NXP]
Multiple voltage regulator with switch; 带开关多电压调节器型号: | TDA3608Q |
厂家: | NXP |
描述: | Multiple voltage regulator with switch |
文件: | 总20页 (文件大小:127K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
TDA3608Q
Multiple voltage regulator with
switch
1997 Aug 14
Preliminary specification
File under Integrated Circuits, IC01
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
FEATURES
General
GENERAL DESCRIPTION
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
• Low reverse current of regulator 2
• 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.
• 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
• A supply pin which can withstand load dump pulses and
negative supply voltages
• 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.
Protections
• 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.
• 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
DESCRIPTION
VERSION
TDA3608Q
DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
SOT141-6
1997 Aug 14
2
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
9.5
14.4
−
18
V
reverse polarity
regulator 2 on
jump start
non-operating
−
−18
50
V
2.4
−
14.4
−
V
t ≤ 10 minutes
30
V
load dump protection
t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
Iq(tot)
Tj
total quiescent supply current standby mode
junction temperature
−
500
−
600
150
µA
°C
−
Voltage regulators
VO(REG1) output voltage regulator 1
VO(REG2) output voltage regulator 2
VO(REG3) output voltage regulator 3
1 mA ≤ IREG1 ≤ 600 mA
8.15
8.5
5.0
5.0
8.85
5.25
5.25
V
V
V
0.5 mA ≤ IREG2 ≤ 300 mA; VP = 14.4 V 4.75
1 mA ≤ IREG3 ≤ 400 mA
4.75
Power switch
Vd
drop-out voltage
ISW = 1 A
−
−
3
0.45
1
0.7
1.8
−
V
V
A
ISW = 1.8 A
IM
peak current
−
1997 Aug 14
3
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
BLOCK DIAGRAM
POWER SWITCH
13 (14.2 V/3 A)
(14.4 V)
1
7
V
SW
P
1 A after 10 ms
(short-circuit)
TEMPERATURE
LOAD DUMP
PROTECTION
ENSW
&
BACK-UP SWITCH
12
(14.2 V/100 mA)
BU
BACK-UP CONTROL
11 (5 V/100 mA)
REGULATOR 2
REGULATOR 3
REG2
REG3
3
(5 V/400 mA)
&
&
4
6
EN3
EN1
2
8
(8.5 V/600 mA)
REGULATOR 1
REG1
HOLD
TDA3608Q
5
RES
9
C
RES
10
MGK602
GND
Fig.1 Block diagram.
4
1997 Aug 14
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
PINNING
SYMBOL
PIN
DESCRIPTION
supply voltage
handbook, halfpage
V
1
2
P
VP
1
2
REG1
REG3
EN3
REG1
REG3
EN3
regulator 1 output
regulator 3 output
enable input regulator 3
reset output
3
3
4
4
RES
EN1
5
RES
EN1
5
6
enable input regulator 1
enable input power switch
hold output
6
ENSW
HOLD
CRES
GND
REG2
BU
7
ENSW
HOLD
7
TDA3608Q
8
8
9
reset delay capacitor
ground
C
9
10
11
12
13
RES
regulator 2 output
back-up
10
11
12
13
GND
REG2
BU
SW
power switch output
SW
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).
The total timing diagram is shown in Fig.3.
1997 Aug 14
5
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
load dump
V
P
6.5 V
5.4 V
4.0 V
V
bu
5.0 V
regulator 2
1.9 V
0 V
5.0 V
3.0 V
0 V
reset
delay
capacitor
6.0 V
reset
Back-up Schmitt trigger and reset behaviour
load dump
18.0 V
9.9 V
4.5 V
4.0 V
V
P
≥2.2 V
≤2.0 V
enable
regulator 1
8.5 V
0 V
regulator 1
≥2.2 V
≤2.0 V
enable
regulator 3
5.0 V
0 V
regulator 3
V
and enable Schmitt trigger
P
load dump
16.9 V
V
P
4.5 V
4.0 V
enable
power
switch
≥2.2 V
≤2.0 V
power
switch
output
0 V
MGK603
Power switch behaviour
Fig.3 Timing diagrams.
6
1997 Aug 14
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
supply voltage
CONDITIONS
MIN.
MAX.
UNIT
operating
−
−
−
−
−
18
V
reverse polarity
non-operating
−18
30
V
jump start
t ≤ 10 minutes
V
load dump protection
total power dissipation
storage temperature
ambient temperature
junction temperature
t ≤ 50 ms; tr ≥ 2.5 ms
50
V
Ptot
Tstg
Tamb
Tj
62
W
°C
°C
°C
non-operating
operating
−55
−40
−40
+150
+85
+150
operating
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
thermal resistance from junction to case
thermal resistance from junction to ambient
CONDITIONS
VALUE
UNIT
K/W
K/W
Rth(j-c)
Rth(j-a)
2
in free air
50
1997 Aug 14
7
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
9.5
2.4
−
14.4
14.4
−
18
18
V
regulator 2 on
note 1
V
jump start
t ≤ 10 minutes
30
V
load dump protection
quiescent supply current
t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
Iq
VP = 12.4 V; note 2;
−
500
600
µA
IREG2 = 0.1 mA
VP = 14.4 V; note 2;
IREG2 = 0.1 mA
−
520
−
µA
Schmitt trigger power supply for regulator 1, regulator 3 and power switch
Vthr
Vthf
Vhys
rising threshold voltage
falling threshold voltage
hysteresis voltage
4.0
3.5
−
4.5
4.0
0.5
5.0
4.5
−
V
V
V
Schmitt trigger for regulator 2
Vthr
Vthf
Vhys
rising threshold voltage
falling threshold voltage
hysteresis voltage
6.0
1.7
−
6.5
1.9
4.6
7.1
2.2
−
V
V
V
Schmitt trigger for enable input (regulator 1, regulator 3 and power switch)
Vthr
Vthf
Vhys
ILI
rising threshold voltage
falling threshold voltage
hysteresis voltage
1.7
1.5
0.1
1
2.2
2.0
0.2
5
2.7
2.5
0.5
10
V
V
IREG = ISW = 1 mA
VEN = 5 V
V
input leakage current
µA
Schmitt trigger for reset
Vthr
Vthf
Vhys
rising threshold voltage of VP rising; IREG1 = 50 mA;
−
V
REG2 − 0.15
REG2 − 0.35
V
REG2 − 0.075
V
V
V
regulator 2
note 3
falling threshold voltage
of regulator 2
VP rising; IREG1 = 50 mA;
note 3
4.3
0.1
V
−
hysteresis voltage
0.2
0.3
Schmitt trigger for hold
Vthr
Vthf
Vhys
rising threshold voltage of VP rising; note 3
regulator 1
−
V
REG1 − 0.15
REG1 − 0.35
V
REG1 − 0.075
V
V
V
falling threshold voltage
of regulator 1
VP rising; note 3
9.2
0.1
V
−
hysteresis voltage
0.2
0.3
1997 Aug 14
8
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Reset and hold buffer
IsinkL
ILO
tr
LOW-level sink current
V
RES/HOLD ≤ 0.8 V
2
−
−
7
1
−
mA
µA
µs
output leakage current
rise time
VP = 14.4 V; VRES/HOLD = 5 V
−
−
−
2
note 4
note 4
50
50
tf
fall time
µs
Reset delay
Ich
charge current
2
4
8
µA
µA
V
Idch
Vthr
td
discharge current
rising threshold voltage
delay time
500
2.5
20
800
3.0
35
−
3.5
70
C = 47 nF; note 5
ms
Regulator 1 (IREG1 = 5 mA unless otherwise specified)
VO(off)
VO
output voltage off
output voltage
−
1
400
8.85
8.85
75
mV
V
1 mA ≤ IREG1 ≤ 600 mA
11 V ≤ VP ≤ 18 V
8.15 8.5
8.15 8.5
V
∆V
line regulation
load regulation
quiescent current
11 V ≤ VP ≤ 18 V
−
2
mV
mV
mA
dB
∆VL
Iq
1 mA ≤ IREG1 ≤ 600 mA
IREG1 = 600 mA
−
20
25
70
50
−
60
SVRR
supply voltage ripple
rejection
fi = 3 kHz; Vi(p-p) = 2 V
60
−
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
250 800
−
−
A
Isc
short-circuit current
RL ≤ 0.5 Ω; note 8
mA
Regulator 2 (IREG2 = 5 mA unless otherwise specified)
VO
output voltage
0.5 mA ≤ IREG2 ≤ 150 mA
REG2 = 300 mA; note 9
4.75 5.0
4.75 5.0
4.75 5.0
4.75 5.0
5.25
5.25
5.25
5.25
V
V
V
V
I
7 V ≤ VP ≤ 18 V
18 V ≤ VP ≤ 50 V;
IREG2 ≤ 150 mA
∆V
line regulation
load regulation
6 V ≤ VP ≤ 18 V
−
2
50
75
50
100
−
mV
mV
mV
mV
dB
18 V ≤ VP ≤ 50 V
−
15
20
−
∆VL
1 mA ≤ IREG2 ≤ 150 mA
1 mA ≤ IREG2 ≤ 300 mA
fi = 3 kHz; Vi(p-p) = 2 V
−
−
SVRR
supply voltage ripple
rejection
60
70
1997 Aug 14
9
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
SYMBOL
PARAMETER
drop-out voltage
CONDITIONS
IREG2 = 100 mA;
VP = 4.75 V; note 6
REG2 = 200 mA;
MIN.
TYP.
MAX.
UNIT
Vd
−
0.4
0.8
0.2
0.8
0.6
1.2
0.5
1.0
V
I
−
−
−
V
V
V
VP = 5.75 V; note 6
IREG2 = 100 mA;
VBU = 4.75 V; note 10
IREG2 = 200 mA;
VBU = 5.75 V; note 10
VREG2 > 4.5 V; note 7
RL ≤ 0.5 Ω; note 8
Im
current limit
0.32 0.37
−
−
A
Isc
short-circuit current
20
100
mA
Regulator 3 (IREG3 = 5 mA unless otherwise specified)
VO(off)
VO
output voltage off
output voltage
−
1
400
5.25
5.25
50
mV
V
1 mA ≤ IREG3 ≤ 400 mA
7 V ≤ VP ≤ 18 V
4.75 5.0
4.75 5.0
V
∆V
line regulation
load regulation
quiescent current
7 V ≤ VP ≤ 18 V
−
2
mV
mV
mA
dB
∆VL
Iq
1 mA ≤ IREG3 ≤ 400 mA
IREG3 = 400 mA
−
20
15
70
50
−
40
SVRR
supply voltage ripple
rejection
fi = 3 kHz; Vi(p-p) = 2 V
60
−
Vd
drop-out voltage
IREG3 = 400 mA;
−
1
1.5
V
VP = 5.75 V; note 6
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
mA
Power switch
Vd
drop-out voltage
ISW = 1 A; note 11
−
0.45
1.0
0.7
1.8
−
V
V
A
V
A
V
A
ISW = 1.8 A; note 11
VP = 16 V, VSW = 13.5 V
VP ≥ 17 V
−
Idc
Vcl
IM
continuous current
clamping voltage
peak current
1.8
2.0
13.5 15.0
16.0
−
VP = 17 V; notes 12 and 13
3
−
Vfb
Isc
fly back voltage behaviour ISW = −100 mA
short-circuit current VP = 14.4 V; VSW < 1.2 V;
−
VP + 3
0.8
22
−
note 13
Back-up switch
Idc
Vcl
Ir
continuous current
0.3
0.35
−
−
A
clamping voltage
reverse current
VP ≥ 16.7 V
−
16
900
V
VP = 0; VBU = 12.4 V; note 14 −
−
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
Ich
5. The delay time depends on the value of the capacitor: td
=
× V
= C × (750×103) (ms)
C (th)
------
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
TDA3608Q
handbook, halfpage
8.5 V
MGK604
handbook, halfpage
V
O(REG2)
V
MGK655
O(REG1)
5.0 V
2 V
1 V
I
I
I
I
≥50 mA
≥300 mA
REGsc2
REGm2
REGsc1
REGm1
I
REG2
I
REG1
b. Regulator 2.
a. Regulator 1.
handbook, halfpage
V
O(REG3)
5.0 V
MGK656
1 V
I
I
REGm3
≥200 mA
REGsc3
I
REG3
c. Regulator 3.
Fig.4 Foldback current protection of the regulators.
handbook, halfpage
MGB758
≥3
I
sw
(A)
1.8
t (ms)
≥10
VSW ≥ 5 V.
Fig.5 Current protection of the power switch.
1997 Aug 14
12
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch
TDA3608Q
TEST AND APPLICATION INFORMATION
Test information
supply voltage
power switch output
13
1
(1)
C1
V
R4
2.2 Ω
R
P
L(sw)
220 nF
1 kΩ
C2
220 nF
regulator 2
output
enable input power switch
enable input regulator 1
enable input regulator 3
5 V
7
6
4
11
2
C3
10 µF
V
R
ENSW
L(REG2)
1 kΩ
regulator 1
output
10 V
C4
10 µF
V
R
EN1
L(REG1)
1 kΩ
regulator 3
output
TDA3608Q
5 V
3
C5
10 µF
R
V
L(REG3)
EN3
1 kΩ
R2
10 kΩ
reset delay
capacitor
reset
output
9
5
8
C7
C6
47 nF
1 µF
R3
10 kΩ
hold output
back-up
12
R1
C8
10
V
bu
1 kΩ
220 nF
GND
MGK605
(1) Capacitor not required for stability.
Fig.6 Test circuit.
Application information
Table 1 Noise figures
NOISE FIGURE(1)
CO = 10 µF CO = 47 µF CO = 100 µF
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.
1
2
3
225 µV
225 µV
255 µV
150 µV
150 µV
200 µV
135 µV
135 µV
180 µV
Note
1. Measured at a bandwidth of 200 kHz.
1997 Aug 14
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.
Example 2
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.
handbook, halfpage
MBK099
14
12
10
8
MBK100
handbook, halfpage
maximum ESR
4
R
(Ω)
maximum ESR
R
(Ω)
3
stable region
2
stable region
6
4
1
2
minimum ESR
minimum ESR
10
0
0
0.22
1
10
100
1
100
C (µF)
C (µF)
Fig.7 Curves for selecting value of output
capacitor for regulators 1 and 3.
Fig.8 Curves for selecting value of output
capacitor for regulator 2.
1997 Aug 14
14
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
x
D
h
D
E
h
view B: mounting base side
d
A
2
B
j
E
A
L
3
L
Q
c
1
13
e
e
m
v
M
w
M
1
Z
2
b
p
e
0
5
10 mm
scale
DIMENSIONS (mm are the original dimensions)
(1)
(1)
(1)
UNIT
A
A
b
c
D
d
D
E
e
e
e
E
j
L
L
3
m
Q
v
w
x
Z
2
p
h
1
2
h
17.0 4.6 0.75 0.48 24.0 20.0
15.5 4.2 0.60 0.38 23.6 19.6
12.2
11.8
3.4 12.4 2.4
3.1 11.0 1.6
2.00
1.45
2.1
1.8
6
mm
10
3.4
1.7 5.08
0.8
4.3
0.25 0.03
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
92-11-17
95-03-11
SOT141-6
1997 Aug 14
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
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
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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Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
© 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
相关型号:
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