LM2941, LM2941C

SNVS770I – JUNE 1999 – REVISED JANUARY 2015

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8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

capacitance value of at least 22 µF with an equivalent series resistance (ESR) of at least 100 m

Ω, but no more

than 1

Ω. The minimum capacitance value and the ESR requirements apply across the entire expected operating

ambient temperature range.

8.2 Typical Application

Note: Using 1 k

Ω for R1 will ensure that the bias current error from the adjust pin will be negligible. Do not bypass R1

or R2. This will lead to instabilities.

* Required if regulator is located far from power supply filter.

transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating

temperature range as the regulator and the ESR is critical.

Figure 18. 5-V to 20-V Adjustable Regulator

8.2.1 Design Requirements

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage range

10 V to 26 V

Output voltage

15 V

Output current range

5 mA to 1 A

Input capacitor value

0.47 µF

Output capacitor value

22 µF minimum

Output capacitor ESR range

100 m

Ω to 1 Ω

12

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