TLS208D1

Application Information

Data Sheet

25

Rev. 1.0, 2015-02-26

9.2

Fixed Voltage Version - TLS208D1xxV33

Figure 10

Application Diagram Fixed Voltage Version (e.g. TLS208D1LDV33)

Note: This is a very simplified example of an application circuit. The function must be verified in the real application.

For the fixed voltage variants of the TLS208D1 the feedback pin FB must be connected to the output voltage to

be regulated. This connection is mandatory to ensure proper regulation.

The output capacitor should be sized according to the application needs in terms of load and line variations.

Examples for loadsteps are given as typical performance graphs at Page 15.

TLS208D1 is designed to work with ceramic output caps, but allows also the usage of other capacitors according

to the allowed ESR range defined in the Functional Range. Furthermore there is a typ. performance graph on the

stability of the device at Page 14.

The fixed voltage variants have an default internal reset threshold (P_8.2.1) which can be used by connecting the

RADJ pin to GND. Furthermore the reset threshold can be adjusted to lower values than the internal reset

threshold by connecting a resistor divider (

R

RADJ,1 & RRADJ2) between the Q and RADJ. For the calculation of the

resistor values please refer to Equation (1) in Chapter 8.1.

VI

I

220nF

EN

1

2

3

TLS208D1LDV33

5

10

9

8

7

6

4

From µC

GND

LOAD

Regulated

Output Voltage

Q

To µC

Reset

RO

RADJ

RADJ,1

RADJ,2

ESR

C

CQ

Cin

optional

RRO,ext

FB