Information

Chapter 42
USB Voltage Regulator
42.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
The USB Voltage Regulator module is a LDO linear voltage regulator to provide 3.3V
power from an input power supply varying from 2.7 V to 5.5 V. It consists of one 3.3 V
power channel. When the input power supply is below 3.6 V, the regulator goes to pass-
through mode. The following figure shows the ideal relation between the regulator output
and input power supply.
OUTPUT
(Volt)
3.3
2.7
2.4
2.7
3.0
3.6
5.5
INPUT (Volt)
Figure 42-1. Ideal Relation Between the Regulator Output and Input Power Supply
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 951