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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