Operating Modes; Radio Modes; Power Modes; Power Management - u-blox ODIN-W260 System Integration Manual

1.4 Operating modes

1.4.1 Radio modes

The ODIN-W2 series is a stand-alone multiradio module that supports Wi-Fi, Bluetooth classic, and Bluetooth low
energy. It can run as a single radio module with only one radio-mode enabled or as a true multiradio module
with both Bluetooth and Wi-Fi enabled concurrently.
When the ODIN-W2 series module runs as a multiradio module, coexistence is handled internally. In other words,
the ODIN-W2 series module will swap between Bluetooth and Wi-Fi when needed and ensures that no
transmissions occur simultaneously.

1.4.2 Power modes

Different modes will be available to optimize power consumption. This will be implemented in future software
releases.
To enable any power saving mode, an external low power oscillator clock (LPO) is required. See the Low
power clock (LPO_CLK) design section for more information about the external LPO design.

1.5 Power management

1.5.1 Module supply requirements (VCC)

The ODIN-W2 series modules must be supplied with a DC power through VCC pins. Voltage must be stable, as
during operation, the current drawn from the VCC can vary significantly depending on the power consumption
profile of the Bluetooth (BT) and Wi-Fi technologies.
See Module supply requirements (VCC) section for power supply design information and the ODIN-W2 series
Data Sheet [2] for information about voltage supply requirement.

1.5.2 Generic digital interfaces supply output (V_INT)

The ODIN-W2 series modules provide a 1.8 V supply rail output through the V_INT pin, which is internally
generated when the module has VCC supplied. The same voltage domain is used internally to supply the generic
digital interfaces of the modules. The V_INT supply output can be used instead of an external discrete regulator.

1.5.3 VCC application circuits

The ODIN-W2 series modules must be supplied with a proper DC power supply through the VCC pins, which can
be one of the following:
•
Switching regulator
•
Low Drop Out (LDO) regulator
The switching step-down regulator is the right choice when the available primary supply source has a nominal
voltage much higher (for example, greater than 5 V) than the operating supply voltage of the ODIN-W2 series.
The use of switching step-down provides the best power efficiency for the overall application and minimizes
current drawn from the main supply source. While selecting the switching step-down regulator, ensure that the
output voltage is clean and does not inject noise to the module. Appropriate filtering might be needed.
The use of an LDO linear regulator is convenient for a primary supply with a relatively low voltage (for example,
less than 5 V). In this case, the typical 90% efficiency of the switching regulator will diminish the benefit of
voltage step-down and no true advantage will be gained in input current savings. On the other side, linear
regulators are not recommended for high voltage step-down as they will dissipate a considerable amount of
energy in thermal power.
Independent of the selected DC power supply, it is crucial that the ODIN-W2 series can handle the high peak
currents generated by the RF transceiver and front end. It is recommended to use a supply that can deliver 1A. It
is considered as best practice to have decoupling capacitors on the supply rails close to the ODIN-W2 series
module, although depending on the design of the power routing on the host system, capacitance might not be
needed.
UBX-14040040 - R03
ODIN-W2 series - System Integration Manual
Advance Information System description
Page 9 of 33