INTEGRATED CIRCUITS
DATA SHEET
TDA3675
Low dropout voltage/quiescent
current 8.5 V voltage regulator with
enable
Preliminary specification
Supersedes data of 1999 Nov 22
File under Integrated Circuits, IC01
2000 Feb 01
Philips Semiconductors
Preliminary specification
Low dropout voltage/quiescent current
8.5 V voltage regulator with enable
FEATURES
•
Fixed 8.5 V, 100 mA regulator with enable function
•
Supply voltage range up to 33 V (45 V)
•
Very low quiescent current of 15
µA
(typical value)
•
Very low dropout voltage
•
High ripple rejection
•
Very high stability:
– Electrolytic capacitors: Equivalent Series Resistance
(ESR) < 38
Ω
at I
REG
≤
25 mA
– Other capacitors: 100 nF at 200
µA ≤
I
REG
≤
100 mA.
•
Pin compatible family TDA3672 to TDA3676
•
Protections:
– Reverse polarity safe (down to
−25
V without high
reverse current)
– Negative transient of 50 V (R
S
= 10
Ω,
t < 100 ms)
QUICK REFERENCE DATA
SYMBOL
Supply
V
P
supply voltage
TDA3675T
TDA3675AT
I
q
quiescent supply current
V
P
= 14.4 V; I
REG
= 0 mA;
V
I(EN)
= 5 V
V
I(EN)
= 5 V
11.5 V
≤
V
P
≤
22 V; I
REG
= 0.5 mA
9.5 V
≤
V
P
≤
45 V; I
REG
= 0.5 mA
V
P
= 14.4 V;
0.5 mA
≤
I
REG
≤
100 mA
V
REG(drop)
dropout voltage
V
P
= 8.0 V; I
REG
= 50 mA
8.16
8.08
8.08
−
8.5
8.5
8.5
0.18
regulator on
3
3
−
14.4
14.4
15
PARAMETER
CONDITIONS
MIN.
TYP.
TDA3675
– Able to withstand voltages up to 18 V at the output
(supply line may be short-circuited)
– ESD protection for all pins
– DC short-circuit safe to ground and V
P
of the
regulator output
– Temperature protection at T
j
> 150
°C.
GENERAL DESCRIPTION
The TDA3675 is a fixed 8.5 V voltage regulator with very
low dropout voltage and quiescent current, which operates
over a wide supply voltage range.
The IC is available as:
•
TDA3675T: V
P
≤
33 V,
−40 °C ≤
T
amb
≤
+85
°C
and
SO8 package (non-automotive)
•
TDA3675AT: V
P
≤
45 V,
−40 °C ≤
T
amb
≤
+125
°C
and
SO8 package (automotive).
MAX.
UNIT
33
45
30
V
V
µA
Regulator output
V
REG
regulator output voltage
8.84
8.92
8.92
0.3
V
V
V
V
ORDERING INFORMATION
TYPE
NUMBER
TDA3675T
TDA3675AT
PACKAGE
NAME
SO8
SO8
DESCRIPTION
plastic small outline package; 8 leads; body width 3.9 mm
plastic small outline package; 8 leads; body width 3.9 mm
VERSION
SOT96-1
SOT96-1
2000 Feb 01
2
Philips Semiconductors
Preliminary specification
Low dropout voltage/quiescent current
8.5 V voltage regulator with enable
BLOCK DIAGRAM
TDA3675
handbook, halfpage
VP
8
REGULATOR
1
REG
EN
5
BAND GAP
THERMAL
PROTECTION
2, 3, 6, 7
MGL829
TDA3675
GND
Fig.1 Block diagram.
PINNING
SYMBOL
REG
GND
n.c.
EN
V
P
Note
1. All GND pins are connected to the lead frame and can
also be used to reduce the total thermal resistance
R
th(j-a)
by soldering these pins to a ground plane.
The ground plane on the top side of the Printed-Circuit
Board (PCB) acts like a heat spreader.
PIN (SO8)
1
2, 3, 6 and 7
4
5
8
DESCRIPTION
regulator output
ground; note 1
not connected
enable input
supply voltage
handbook, halfpage
REG 1
GND 2
8 VP
7
GND
GND
EN
TDA3675
GND
n.c.
3
4
MGL830
6
5
Fig.2 Pin configuration.
2000 Feb 01
3
Philips Semiconductors
Preliminary specification
Low dropout voltage/quiescent current
8.5 V voltage regulator with enable
FUNCTIONAL DESCRIPTION
The TDA3675 is a fixed 8.5 V regulator which can deliver
output currents up to 100 mA. The regulator is available in
an SO8 package with fused centre pins connected to the
lead frame. The regulator is intended for portable, mains,
telephone and automotive applications. To increase the
lifetime of batteries, a specially built-in clamp circuit keeps
the quiescent current of this regulator very low, also in
dropout and full load conditions.
The regulator remains operating down to very low supply
voltages and below this voltage it switches off.
TDA3675
A temperature protection circuit is included, which
switches off the regulator output at a junction temperature
above 150
°C.
A new output circuit guarantees the stability of the
regulator for a capacitor output circuit with an ESR up to
20
Ω.
If only a 100 nF capacitor is used, the regulator is
fully stable when I
REG
> 200 mA. This is very attractive as
the ESR of an electrolytic capacitor increases strongly at
low temperatures (no expensive tantalum capacitor is
required).
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
P
PARAMETER
supply voltage
TDA3675T
TDA3675AT
V
P(rp)
P
tot
T
stg
T
amb
reverse polarity supply voltage
total power dissipation
storage temperature
ambient temperature
TDA3675T
TDA3675AT
T
j
junction temperature
operating
non-operating
temperature of PCB ground
plane is 25
°C
non-operating
operating
−40
−40
−40
+85
+125
+150
°C
°C
°C
−
−
−
−
−55
33
45
−25
4.1
+150
V
V
V
W
°C
CONDITIONS
MIN.
MAX.
UNIT
THERMAL CHARACTERISTICS
SYMBOL
R
th(j-a)
R
th(j-c)
PARAMETER
thermal resistance from junction to ambient
thermal resistance from junction to case
CONDITIONS
in free air; soldered
to centre pins; soldered
VALUE
125
30
UNIT
K/W
K/W
QUALITY SPECIFICATION
In accordance with
“SNW-FQ-611E”.
2000 Feb 01
4
Philips Semiconductors
Preliminary specification
Low dropout voltage/quiescent current
8.5 V voltage regulator with enable
CHARACTERISTICS
V
P
= 14.4 V; T
amb
= 25
°C;
V
I(EN)
= 5 V; measured in test circuit of Fig.3; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
TDA3675
MAX.
UNIT
Supply voltage: pin V
P
V
P
supply voltage
TDA3675T
TDA3675AT
I
q
quiescent current
regulator operating; note 1
3
3
V
P
= 14.4 V; I
REG
= 0 mA; V
I(EN)
= 0 V
−
V
P
= 14.4 V; I
REG
= 0 mA; V
I(EN)
= 5 V
−
9.5 V
≤
V
P
≤
22 V; I
REG
= 10 mA
9.5 V
≤
V
P
≤
22 V; I
REG
= 50 mA
Enable input: pin EN
V
I(EN)
I
I(EN)
V
REG
enable input voltage
enable input current
enable off; V
REG
≤
0.8 V
enable on; V
REG
≥
8.0 V
V
I(EN)
= 5 V
11.5 V
≤
V
P
≤
22 V; I
REG
= 0.5 mA
9.5 V
≤
V
P
≤
45 V; I
REG
= 0.5 mA;
T
amb
≤
125
°C
0.5 mA
≤
I
REG
≤
100 mA;
T
amb
≤
125
°C
V
REG(drop)
V
REG(stab)
∆V
REG(line)
dropout voltage
long-term stability voltage
line input regulation voltage 11.5 V
≤
V
P
≤
16 V; I
REG
= 0.5 mA
10.5 V
≤
V
P
≤
22 V; I
REG
= 0.5 mA
7 V
≤
V
P
≤
45 V; I
REG
= 0.5 mA;
T
amb
≤
125
°C
∆V
REG(load)
load output regulation
voltage
SVRR
I
REG(crl)
I
LO(rp)
Notes
1. The regulator output will follow V
P
if V
P
< V
REG
+ V
REG(drop)
.
2. Limiting values as applicable for device type:
a) TDA3675T: V
P
≤
33 V,
−40 °C ≤
T
amb
≤
+85
°C.
b) TDA3675AT: V
P
≤
45 V,
−40 °C ≤
T
amb
≤
+125
°C.
supply voltage ripple
rejection
current limit
output leakage current at
reverse polarity
0.5 mA
≤
I
REG
≤
50 mA;
T
amb
≤
125
°C
f
i
= 120 Hz; V
i(ripple)
= 1 V (RMS);
I
REG
= 0.5 mA
V
REG
> 8.0 V
V
P
=
−15
V; V
REG
≤
0.3 V
V
P
= 8.0 V; I
REG
= 50 mA;
T
amb
≤
85
°C
Regulator output: pin REG;
note 2
output voltage
8.16
8.08
8.08
−
−
−
−
−
−
50
0.17
−
8.5
8.5
8.5
0.18
20
1
1
1
10
60
0.25
1
8.84
8.92
8.92
0.3
−
10
30
50
50
−
−
500
V
V
V
V
mV/1000 h
mV
mV
mV
mV
dB
A
µA
−1.0
3.0
−
−
−
0.3
+1.0
18
−
V
V
µA
−
−
14.4
14.4
4
15
0.2
1.4
33
45
15
30
0.5
2.5
V
V
µA
µA
mA
mA
2000 Feb 01
5
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