K60P100M100SF2RM Datasheet, PDF (1303/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 47 USB Voltage Regulator
• Automatic current limiting if the load current is greater than 290 mA.
• Automatic power-up once some voltage is applied to the regulator input.
• Pass-through mode for regulator input voltages less than 3.6 V
• Small output capacitor: 2.2 uF
• Stable with aluminum, tantalum or ceramic capacitors.
47.1.3 Modes of Operation
The regulator has these power modes:
• RUN—The regulating loop of the RUN regulator and the STANDBY regulator are
active, but the switch connecting the STANDBY regulator output to the external pin
is open.
• STANDBY—The regulating loop of the RUN regulator is disabled and the standby
regulator is active. The switch connecting the STANDBY regulator output to the
external pin is closed.
• SHUTDOWN—The module is disabled.
The regulator is enabled by default. This means that once the power supply is provided,
the module power-up sequence to RUN mode starts.
47.2 USB Voltage Regulator Module Signal Descriptions
The following table shows the external signals for the regulator.
Table 47-1. USB Voltage Regulator Module Signal Descriptions
Signal
Description
I/O
reg33_in
Unregulated power supply
I
reg33_out
Regulator output voltage
O
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1303