Data Sheet

7

Rev. 1.0, 2015-03-12

TLS710B0

Block Description and Electrical Characteristics

5

Block Description and Electrical Characteristics

5.1

Voltage Regulation

The output voltage

V

reference and drives the pass transistor accordingly.

The control loop stability depends on the output capacitor

C

internal circuit design. To ensure stable operation, the output capacitor’s capacitance and its equivalent series

resistor ESR requirements given in Table 2 “Functional Range” on Page 6 must be maintained. For details see

the typical performance graph “Output Capacitor Series Resistor ESR(CQ) versus Output Current IQ” on

Page 10. Since the output capacitor is used to buffer load steps, it should be sized according to the application’s

needs.

An input capacitor

C

additional reverse polarity protection diode and a combination of several capacitors for filtering should be used, in

case the input is connected directly to the battery line. Connect the capacitors close to the regulator terminals.

Whenever the load current exceeds the specified limit, e.g. in case of a short circuit, the output current is limited

and the output voltage decreases.

The overtemperature shutdown circuit prevents the IC from immediate destruction under fault conditions (e.g.

output continuously short-circuited) by switching off the power stage. After the chip has cooled, the regulator

restarts. This oscillatory thermal behaviour causes the junction temperature to exceed the maximum rating of

150°C and can significantly reduce the IC’s lifetime.

Figure 3

Block Diagram Voltage Regulation

LOAD

Supply

Regulated

Output Voltage

C

ESR

Bandgap

Reference

GND

Q

I

Current

Limitation

Temperature

Shutdown

Enable

EN