Chapter 44
USB Voltage Regulator (VREG)
44.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
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
2.1
2.7
3.6
5.5
INPUT (Volt)
Figure 44-1. Ideal Relation Between the Regulator Output and Input Power Supply
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1119
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