Philips TDA3673 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA3673

Very low dropout voltage/quiescent current 3.3 V voltage regulator with enable

Preliminary speciﬁcation Supersedes data of 1999 Sep 29 File under Integrated Circuits, IC01

2000 Feb 01

Philips Semiconductors Preliminary speciﬁcation

Very low dropout voltage/quiescent current

3.3 V voltage regulator with enable

FEATURES

• Fixed 3.3 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

– Other capacitors: 100 nF at 200 µA ≤ I

REG

≤ 25 mA

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 (RS=10Ω, t < 100 ms)

– Able to withstand voltages up to 18 V at the output

– ESD protection on all pins – DC short-circuit safe to ground and VP of the

– 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.

The IC is available as:

• TDA3673T: VP≤ 33 V, −40 °C ≤ T SO8 package (non-automotive)

• TDA3673AT: VP≤ 45 V, −40 °C ≤ T SO8 package (automotive).

(supply line may be short-circuited)

regulator output

amb

TDA3673

≤ +85 °C and

≤ +125 °C and

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

supply voltage regulator on

TDA3673T 3 14.4 33 V TDA3673AT 3 14.4 45 V

quiescent supply current VP= 14.4 V; I

=5V

I(EN)

REG

= 0 mA;

− 15 30 µA

Voltage regulator

REG

output voltage 8 V ≤ VP≤ 22 V; I

6V≤V

0.5 mA ≤ I

≤45 V; I

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

REG(drop)

dropout voltage VP= 3.1 V; I

≤ 85 °C

amb

REG

= 50 mA;

− 0.18 0.3 V

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA3673T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1 TDA3673AT SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1

2000 Feb 01 2

Philips Semiconductors Preliminary speciﬁcation

Very low dropout voltage/quiescent current

3.3 V voltage regulator with enable

BLOCK DIAGRAM

handbook, halfpage

BAND GAP

TDA3673

2, 3, 6, 7

GND

REGULATOR

THERMAL

PROTECTION

MGS593

TDA3673

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

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

GNDGND

GND

2000 Feb 01 3

Fig.2 Pin configuration.

Philips Semiconductors Preliminary 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 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

supply voltage

TDA3673T − 33 V

TDA3673AT − 45 V V P

T T

P(rp) tot

stg amb

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

TDA3673T −40 +85 °C

TDA3673AT −40 +125 °C T

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 up to 20 Ω. If only a 100 nF capacitor is used, the regulator is fully stable when I

> 200 µA. This is very attractive as

REG

the ESR of an 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 Feb 01 4

Philips Semiconductors Preliminary 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

Enable input: pin EN

I(EN)

Regulator output: pin REG; note 2 V

REG

REG(drop)

REG(stab)

∆V

REG(line)

∆V

REG(load)

SVRR supply voltage ripple rejection f

REG(crl)

LO(rp)

=25°C; measured in test circuit of Fig.3; unless otherwise speciﬁed.

amb

supply voltage regulator operating; note 1

TDA3673T 3 14.4 33 V TDA3673AT 3 14.4 45 V

quiescent current VP= 14.4 V; I

=0V

I(EN)

= 14.4 V; I

=5V

I(EN)

6V≤V 6V≤V

≤22 V; I

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

dropout voltage VP= 3.1 V; T

=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

REG

current limit V output leakage current at

REG

VP= −15 V; V

≤45 V; I

≤ 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

Notes

1. The regulator output will follow V

if VP<V

REG+VREG(drop)

2. Limiting values as applicable for device type: a) TDA3673T: VP≤ 33 V and −40 °C ≤ T b) TDA3673AT: VP≤ 45 V and −40 °C ≤ T

amb

≤ +85 °C.

≤ +125 °C.

2000 Feb 01 5

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