Data Sheet

12

Rev. 1.6, 2008-01-22

TLE 7469

Application Information

Figure 3

Application Diagram with Typical External Components

loop from oscillating a ceramic capacitor of

C

Q1 and Q2. In contrast to most low drop voltage regulators the TLE 7469 only needs

moderate capacitance at the outputs and tolerates ceramic capacitors to keep the

stability. This offers more design flexibility to the circuit designer enabling the IC also to

operate without tantalum capacitors.

Additional a buffer capacitor C

suppress influences from load surges to the voltage levels. This one can either be an

aluminum electrolytic capacitor or a tantalum capacitor following the application

requirements.

A general recommendation is to keep the drop over the equivalent serial resistor (ESR)

together with the discharge of the blocking capacitor below the Reset Headroom (e.g.

min. 130mV for the 2.6V Output).

AEA03529_2.VSD

TLE 7469

Q2

DT

WDI

RO

SO

Q1

XC 164

1 µF

47

µF

10 k

Ω

1 µF

47

µF

100 nF

R

100 k

Ω

I2

INH

SI

100 nF

V

Bat

47

µF

e. g.

Ignition

Key

I1

GND

= Optional