TDA3668AT datasheet(2/16 Pages) PHILIPS

2 / 16 page

2000 Feb 01

Philips Semiconductors

Preliminary speciﬁcation

Very low dropout voltage/quiescent current

5 V regulator with overvoltage switch off

TDA3668AT

FEATURES

• Fixed 5 V, 100 mA regulator

• Supply voltage range up to 50 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 IREG ≤ 25 mA

– Other capacitors: 100 nF at 200

µA ≤ IREG ≤ 100 mA.

• Pin compatible family TDA3661 to TDA3676

• Protections:

– Reverse polarity safe (down to

−25 V without high

reverse current)

– Negative transient of 50 V (RS =10 Ω, t < 100 ms)

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

(supply line may be short-circuited)

– ESD protected for all pins

– DC short-circuit safe to ground and VP of regulator

output

– Temperature protection at Tj > 150 °C

– Load dump protection, which will switch off VREG

during load dump.

GENERAL DESCRIPTION

The TDA3668AT is a fixed 5 V voltage regulator with a

very low dropout voltage and quiescent current, which

operates over a wide supply voltage range.

The regulator should use a supply voltage of VP ≤ 50 V.

It has a temperature range of

−40 °C ≤ Tamb ≤ +125 °C,

and it is available as an automotive version in an

SO8 package.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage

regulator on

14.4

load dump; t

≤ 50 ms; tr ≥ 2.5 ms

−−

quiescent supply current

VP = 14.4 V; IREG =0mA

−

µA

Regulator output

VREG

output voltage

8 V

≤ VP ≤ 22 V; IREG = 0.5 mA

4.8

5.0

5.2

≤ VP ≤ 24 V; IREG = 0.5 mA;

Tamb ≤ 125 °C

4.75

5.0

5.25

VP = 14.4 V; 0.5 mA ≤ IREG ≤ 100 mA;

Tamb ≤ 125 °C

4.75

5.0

5.25

VREG(drop)

dropout voltage

VP = 4.5 V; IREG =50mA

−

0.18

0.3

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA3668AT

SO8

plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

TDA3668AT Datasheet(PDF) 2 Page - NXP Semiconductors

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