MIC45116 datasheet(2/8 Pages) MICREL

2 / 8 page

Micrel, Inc.

MIC45116 Evaluation Board

Features

Feedback Resistors

The output voltage on the MIC45116 evaluation board,

which is preset to 1.8V, is determined by the feedback

divider, as illustrated in Equation 1:













BOTTOM

REF

OUT

R51

Eq. 1

where VREF = 0.8V, and RBOTTOM is the lower feedback

resistor.

Leaving the RBOTTOM open by removing all jumpers on the

feedback headers gives a 0.8V output voltage. All other

voltages not listed above can be set by modifying RBOTTOM

value according to Equation 2:

REF

OUT

REF

BOTTOM

R51

−

Eq. 2

Note that the output voltage should not be set to exceed

5V unless the output capacitor (C6) is replaced with a

higher voltage rating.

Table 1. Typical Values of Some Components

VOUT

VIN

R51

(Top Feedback Resistor)

(Bottom Feedback Resistor)

C12

(Cff)

COUT

1.0V

5V to 20V

10kΩ

40.2kΩ

1.0nF

100µF/6.3V

1.2V

5V to 20V

10kΩ

20.0kΩ

1.0nF

100µF/6.3V

1.5V

5V to 20V

10kΩ

11.5kΩ

1.0nF

100µF/6.3V

1.8V

5V to 20V

10kΩ

8.06kΩ

1.0nF

100µF/6.3V

2.5V

5V to 20V

10kΩ

4.75kΩ

1.0nF

100µF/6.3V

3.3V

5V to 20V

10kΩ

3.24kΩ

1.0nF

100µF/6.3V

7V to 20V

10kΩ

1.91kΩ

1.0nF

100µF/6.3V

March 12, 2015

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