TLE 4276

Data Sheet Version 2.2

10

2000-10-11

Application Information for Variable Output Regulator TLE 4276 V, SV, DV, GV

The output voltage of the TLE 4276 V can be adjusted between 2.5 V and 20 V by an

external output voltage divider, closing the control loop to the voltage adjust pin VA.

The voltage at pin VA is compared to the internal reference of typical 2.5 V in an error

amplifier. It controls the output voltage.

Figure 5

Application Detail External Components at Output for Variable

Voltage Regulator

The output voltage is calculated according to Equation 1:

V

(1)

V

To avoid errors caused by leakage current

I

value

R

R

τ

(2)

For a 2.5 V output voltage the output pin Q is directly connected to the adjust pin VA.

The accuracy of the resistors

R

tolerance.

The operation range of the variable TLE 4276 V is

V

a minimum input voltage of 4.3 V is required. For output voltages below 4 V the voltage

drop is 4.3 V –

V

Q

AEB02804

Current

and

Saturation

Control

Internal

Reference

2.5 V Typical

5

V

ref

R

2

R

1

C

Q

22 µF

Q

VA

4