Philips TDA3675 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

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:

– Electrolyticcapacitors: Equivalent Series Resistance

(ESR) < 38 Ω at I

– Othercapacitors: 100 nF at 200 µA ≤ I

• 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)

REG

≤ 25 mA

REG

≤ 100 mA.

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 VP of the

regulator output
– Temperature protection at Tj> 150 °C.

GENERAL DESCRIPTION

The TDA3675 is a fixed 8.5 V voltage regulator with very
lowdropout voltage and quiescentcurrent,which operates
over a wide supply voltage range.

The IC is available as:

• TDA3675T: VP≤ 33 V, −40 °C ≤ T
SO8 package (non-automotive)

• TDA3675AT: VP≤ 45 V, −40 °C ≤ T
SO8 package (automotive).

≤ +85 °C and

amb

≤ +125 °C and

amb

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

supply voltage regulator on

TDA3675T 3 14.4 33 V
TDA3675AT 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

Regulator output

V

REG

V

REG(drop)

regulator output voltage V

dropout voltage VP= 8.0 V; I

=5V

I(EN)

11.5 V ≤ V

9.5 V ≤ V
V

= 14.4 V;

P

0.5 mA ≤ I

≤ 22 V; I

P

≤ 45 V; I

P

= 0.5 mA 8.16 8.5 8.84 V

REG

= 0.5 mA 8.08 8.5 8.92 V

REG

8.08 8.5 8.92 V

≤ 100 mA

REG

=50mA − 0.18 0.3 V

REG

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA3675T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1
TDA3675AT SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1

2000 Feb 01 2

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current

8.5 V voltage regulator with enable

BLOCK DIAGRAM

handbook, halfpage

V

EN

8

P

5

BAND GAP

TDA3675

REGULATOR

THERMAL

PROTECTION

2, 3, 6, 7

GND

MGL829

TDA3675

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 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 thetop side ofthe Printed-Circuit
Board (PCB) acts like a heat spreader.

handbook, halfpage

REG

GND

n.c.

1
2
3
4

TDA3675

MGL830

V

8

P

GNDGND

7

GND

6

EN

5

2000 Feb 01 3

Fig.2 Pin configuration.

Philips Semiconductors Preliminary specification

Low dropout voltage/quiescent current

TDA3675

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.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

supply voltage

TDA3675T − 33 V

TDA3675AT − 45 V
V
P

T
T

P(rp)
tot

stg
amb

reverse polarity supply voltage non-operating −−25 V
total power dissipation temperature of PCB ground

storage temperature non-operating −55 +150 °C
ambient temperature operating

TDA3675T −40 +85 °C

TDA3675AT −40 +125 °C
T

j

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 mA. 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

plane 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

Low dropout voltage/quiescent current

TDA3675

8.5 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; 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; V

amb

P

= 5 V; measured in test circuit of Fig.3; unless otherwise specified.

I(EN)

supply voltage regulator operating; note 1

TDA3675T 3 14.4 33 V
TDA3675AT 3 14.4 45 V

quiescent current VP= 14.4 V; I

V

= 14.4 V; I

P

9.5 V ≤ V

9.5 V ≤ V

P
P

enable input voltage enable off; V

enable on; V

enable input current V

=5V − 0.3 −µA

I(EN)

output voltage 11.5 V ≤ VP≤ 22 V; I

9.5 V ≤ V
T

amb

0.5 mA ≤ I
T

amb

P

≤ 125 °C

REG

≤ 125 °C

dropout voltage VP= 8.0 V; I

T

≤ 85 °C

amb

= 0 mA; V

REG

= 0 mA; V

REG

≤ 22 V; I
≤ 22 V; I

REG
REG

≤ 45 V; I

=10mA − 0.2 0.5 mA

REG

=50mA − 1.4 2.5 mA

REG

≤ 0.8 V −1.0 − +1.0 V
≥ 8.0 V 3.0 − 18 V

= 0.5 mA 8.16 8.5 8.84 V

REG

= 0.5 mA;

REG

≤ 100 mA;

= 50 mA;

REG

=0V − 415µA

I(EN)

=5V − 15 30 µA

I(EN)

8.08 8.5 8.92 V

8.08 8.5 8.92 V

− 0.18 0.3 V

long-term stability voltage − 20 − mV/1000 h
line input regulation voltage 11.5 V ≤ VP≤ 16 V; I

load output regulation
voltage

rejection
current limit V
output leakage current at

10.5 V ≤ V
7V≤V

T

amb

0.5 mA ≤ I
T

amb

f

= 120 Hz; V

i

I

= 0.5 mA

REG

REG

VP= −15 V; V

≤ 22 V; I

P

≤45 V; I

P

REG

≤ 125 °C

≤ 50 mA;

REG

≤ 125 °C

i(ripple)

> 8.0 V 0.17 0.25 − A

REG

= 0.5 mA − 110mV

REG

= 0.5 mA − 130mV

REG

= 0.5 mA;

− 150mV

− 10 50 mV

= 1 V (RMS);

50 60 − dB

≤ 0.3 V − 1 500 µA

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) TDA3675T: VP≤ 33 V, −40 °C ≤ T
b) TDA3675AT: VP≤ 45 V, −40 °C ≤ T

amb

amb

≤ +85 °C.

≤ +125 °C.

2000 Feb 01 5

.