Philips TDA3674T Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA3674

Low dropout voltage/quiescent
current 5 V voltage regulator with
enable

Preliminary specification
File under Integrated Circuits, IC01

1999 Sep 29

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current 5 V
voltage regulator with enable

FEATURES

• Fixed 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

– Other capacitors: 100 nF at200 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

TheTDA3674 is a fixed 5 Vvoltage regulator withvery low
dropout voltage and quiescent current, which operates
over a wide supply voltage range.

The IC is available as:

• TDA3674T: VP≤ 33 V, −40 °C ≤ T
SO8 package (non-automotive)

• TDA3674AT: VP≤ 45 V, −40 °C ≤ T
SO8 package (automotive).

(supply line may be short-circuited)

regulator output

amb

amb

TDA3674

≤ +85 °C and

≤ +125 °C and

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

supply voltage regulator on

TDA3674T 3 14.4 33 V
TDA3674AT 3 14.4 45 V

I

q

quiescent supply current VP= 14.4 V; I

V

=5V

I(EN)

REG

= 0 mA;

− 15 30 µA

Voltage regulator

V

REG

regulator output voltage 8 V ≤ VP≤ 22 V; I

6V≤V

0.5 mA ≤ I

≤45 V; I

P

REG

≤ 100 mA;

= 0.5 mA 4.8 5.0 5.2 V

REG

= 0.5 mA 4.75 5.0 5.25 V

REG

4.75 5.0 5.25 V

VP= 14.4 V

V

REG(drop)

dropout voltage VP= 4.5 V; I

T

≤ 85 °C

amb

REG

= 50 mA;

− 0.18 0.3 V

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA3674T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1
TDA3674AT SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1

1999 Sep 29 2

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current 5 V
voltage regulator with enable

BLOCK DIAGRAM

handbook, halfpage

V

EN

8

P

5

BAND GAP

TDA3674

2, 3, 6, 7

GND

REGULATOR

THERMAL

PROTECTION

MGS597

TDA3674

1

REG

Fig.1 Block diagram.

PINNING

SYMBOL PIN (SO8) 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 frameand 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

TDA3674

MGS598

V

8

P

GNDGND

7

GND

6

EN

5

1999 Sep 29 3

Fig.2 Pin configuration.

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current 5 V

TDA3674

voltage regulator with enable

FUNCTIONAL DESCRIPTION

The TDA3674 is a fixed 5 V regulator which can deliver
output currents up to 100 mA. Theregulator 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, aspecially 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

V

P

supply voltage

TDA3674T − 33 V

TDA3674AT − 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

TDA3674T −40 +85 °C

TDA3674AT −40 +125 °C
T

j

junction temperature operating −40 +150 °C

A temperature protection circuit is included, which
switchesoffthe regulator output atajunctiontemperatures
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”

.

1999 Sep 29 4

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current 5 V

TDA3674

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; note 2
V

REG

V

REG(drop)

V

REG(stab)

∆V

REG(line)

∆V

REG(load)

SVRR supply voltage ripple

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

TDA3674T 3 14.4 33 V
TDA3674AT 3 14.4 45 V

quiescent current VP= 14.4 V; I

V

=0V

I(EN)

V

= 14.4 V; I

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

8V≤V
T

amb

0.5 mA ≤ I
6V≤V

≤22 V; I

P

≤ 125 °C

REG

≤45 V; I

P

dropout voltage VP= 4.5 V; T

I

=50mA

REG

= 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

≥ 4.5 V 3.0 − 18 V

REG

= 0.5 mA 4.8 5.0 5.2 V

REG

= 0.5 mA;

REG

− 415µA

− 15 30 µA

4.75 5.0 5.25 V

≤ 100 mA 4.75 5.0 5.25 V

= 0.5 mA 4.75 5.0 5.25 V

REG

amb

≤ 85 °C;

− 0.18 0.3 V

long-term stability − 20 − mV/1000 h
line input regulation voltage 8 V ≤ VP≤ 16 V; I

load output regulation

7V≤V
7V≤V

0.5 mA ≤ I

≤22 V; I

P

≤45 V − 150mV

P

≤ 50 mA − 10 50 mV

REG

= 0.5 mA − 110mV

REG

= 0.5 mA − 130mV

REG

voltage

f

rejection
current limit V
output leakage current at

= 120 Hz; V

i

I

= 0.5 mA

REG

> 4.5 V 0.13 0.25 − A

REG

VP= −15 V; V

= 1 V (RMS);

i(ripple)

≤ 0.3 V − 1 500 µA

REG

50 60 − dB

reverse polarity

Notes

1. The regulator output will follow V

if VP<V

P

REG+VREG(drop)

2. Limiting values as applicable for device type:
a) TDA3674T: VP≤ 33 V, −40 °C ≤ T
b) TDA3674AT: VP≤ 45 V, −40 °C ≤ T

amb

amb

≤ +85 °C.

≤ +125 °C.

1999 Sep 29 5

.