Philips TDA3673AT Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TDA3673
Very low dropout voltage/quiescent
current 3.3 V voltage regulator with
enable
Product specification
Supersedes data of 2000 Dec 08
File under Integrated Circuits, IC01
2000 Dec 14
Philips Semiconductors Product specification
Very low dropout voltage/quiescent current
TDA3673
3.3 V voltage regulator with enable
FEATURES
• Fixed 3.3 V, 100 mA regulator with enable function
• Supply voltage range up to 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) < 22 Ω at worst-case condition
– 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)
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
– Negative transient of 50 V (RS=10Ω, t < 100 ms)
– Able to withstand voltages up to 18 V at the output
(supply line may be short-circuited)
– ESD protection on all pins
– DC short-circuit safe to ground and VP of the
regulator output
– Temperature protection (at Tj> 150 °C).
GENERAL DESCRIPTION
The TDA3673 is a fixed 3.3 V voltage regulator with very
lowdropoutvoltageandquiescentcurrent,which operates
over a wide supply voltage range.
Supply
V
P
I
q
supply voltage regulator on 3 14.4 45 V
quiescent supply current VP= 14.4 V; I
V
=5V
I(EN)
REG
= 0 mA;
− 15 30 µA
Voltage regulator
V
REG
output voltage 8 V ≤ VP≤ 22 V; I
6V≤V
0.5 mA ≤ I
≤45 V; I
P
REG
≤ 100 mA;
= 0.5 mA 3.16 3.3 3.44 V
REG
= 0.5 mA 3.13 3.3 3.47 V
REG
3.13 3.3 3.47 V
VP= 14.4 V
V
REG(drop)
dropout voltage VP= 3.1 V; I
T
≤ 85 °C
amb
REG
= 50 mA;
− 0.18 0.3 V
ORDERING INFORMATION
TYPE
NUMBER
NAME DESCRIPTION VERSION
PACKAGE
TDA3673AT SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1
2000 Dec 14 2
Philips Semiconductors Product specification
Very low dropout voltage/quiescent current
3.3 V voltage regulator with enable
BLOCK DIAGRAM
handbook, halfpage
V
EN
8
P
5
BAND GAP
TDA3673
2, 3, 6, 7
GND
REGULATOR
THERMAL
PROTECTION
MGS593
TDA3673
1
REG
Fig.1 Block diagram.
PINNING
SYMBOL PIN DESCRIPTION
REG 1 regulator output
GND 2, 3, 6 and 7 ground; note 1
n.c. 4 not connected
EN 5 enable input
V
P
8 supply voltage
Note
1. All GND pins are connected to the lead frame and can
also be used to reduce the total thermal resistance
R
by soldering these pins to a ground plane.
th(j-a)
The ground plane on the top side of the PCB acts like
a heat spreader.
handbook, halfpage
REG
GND
n.c.
1
2
3
4
TDA3673
MGS594
V
8
P
GNDGND
7
GND
6
EN
5
2000 Dec 14 3
Fig.2 Pin configuration.
Philips Semiconductors Product specification
Very low dropout voltage/quiescent current
TDA3673
3.3 V voltage regulator with enable
FUNCTIONAL DESCRIPTION
The TDA3673 is a fixed 3.3 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 it switches off.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
V
P
T
T
T
P
P(rp)
tot
stg
amb
j
supply voltage − 45 V
reverse polarity supply voltage non-operating −−25 V
total power dissipation temperature of copper area
storage temperature non-operating −55 +150 °C
ambient temperature operating −40 +125 °C
junction temperature operating −40 +150 °C
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
(worst-case)up to 22 Ω, see Figs 4 and 5. If onlya 100 nF
capacitor is used, the regulator is fully stable when
I
> 200 µA. This is very attractive as the ESR of an
REG
electrolytic capacitor increases strongly at low
temperatures (no expensive tantalum capacitor is
required).
− 4.1 W
is 25 °C
THERMAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS VALUE UNIT
R
R
th(j-a)
th(j-c)
thermal resistance from junction to ambient in free air; soldered 125 K/W
thermal resistance from junction to case to centre pins; soldered 30 K/W
QUALITY SPECIFICATION
In accordance with
“SNW-FQ-611E”
.
2000 Dec 14 4
Philips Semiconductors Product specification
Very low dropout voltage/quiescent current
TDA3673
3.3 V voltage regulator with enable
CHARACTERISTICS
VP= 14.4 V; T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply voltage: pin V
V
P
I
q
Enable input: pin EN
V
I(EN)
I
I(EN)
Regulator output: pin REG
V
REG
V
REG(drop)
V
REG(stab)
∆V
REG(line)
∆V
REG(load)
SVRR supply voltage ripple rejection f
I
REG(crl)
I
LO(rp)
=25°C; measured in test circuit of Fig.3; unless otherwise specified.
amb
P
supply voltage regulator operating; note 1 3 14.4 45 V
quiescent current VP= 14.4 V; I
V
=0V
I(EN)
= 14.4 V; I
V
P
V
=5V
I(EN)
6V≤V
6V≤V
≤22 V; I
P
≤22 V; I
P
enable input voltage enable off; V
enable on; V
enable input current V
=5V − 0.3 −µA
I(EN)
output voltage 8 V ≤ VP≤ 22 V; I
0.5 mA ≤ I
6V≤V
REG
≤45 V; I
P
dropout voltage VP= 3.1 V; T
I
=50mA
REG
long-term output voltage
= 0 mA;
REG
= 0 mA;
REG
=10mA − 0.2 0.5 mA
REG
=50mA − 1.4 2.5 mA
REG
≤ 0.8 V −1 − +1.0 V
REG
≥ 3 V 3.0 − 18 V
REG
= 0.5 mA 3.16 3.3 3.44 V
REG
− 415µA
− 15 30 µA
≤ 100 mA 3.13 3.3 3.47 V
= 0.5 mA 3.13 3.3 3.47 V
REG
amb
≤ 85 °C;
− 0.18 0.3 V
− 20 − mV/1000 h
stability
line input regulation voltage 7 V ≤ VP≤ 22 V; I
7V≤V
load output regulation voltage 0.5 mA ≤ I
= 120 Hz; V
i
I
REG
current limit V
output leakage current at
REG
VP= −15 V; V
≤45 V; I
P
≤ 50 mA − 10 50 mV
REG
i(ripple)
= 0.5 mA
> 2.8 V 0.17 0.25 − A
REG
= 0.5 mA − 130mV
REG
= 0.5 mA − 150mV
REG
= 1 V (RMS);
50 60 − dB
≤ 0.3 V − 1 500 µA
reverse polarity input
Note
1. The regulator output will follow V
if VP<V
P
REG+VREG(drop)
2000 Dec 14 5
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