Micrel, Inc.

MIC5233

September 2009

8

M9999-092109

Assuming a lower output current of 10mA, the maximum

input voltage can be recalculated:

⎟

⎟

⎠

⎞

⎜

⎜

⎝

⎛

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

+

=

2

1

REF

OUT

R

R

1

V

V

Feedback resistor R2 should be no larger than 300kΩ.

OUT

ADJ.

2.2µF

1.0µF

EN

IN

GND

MIC5233BM5

Maximum input voltage for a 10mA load current at 50°C

ambient temperature is 34.9V, utilizing virtually the entire

operating voltage range of the device.

Adjustable Regulator Application

The MIC5233BM5 can be adjusted from 1.24V to 20V by

using two external resistors (Figure 1). The resistors set

the output voltage based on the following equation:

Figure 1.

Adjustable Voltage Application