4.2.1 DC-DC Operating Limits
The maximum supported voltage on the VREGVDD supply pin is limited under certain conditions. Maximum input voltage is a function
of temperature and the average load current over a 10-year lifetime.
Figure 4.1 Lifetime average load current limit vs. Maximum input
shows the safe operating region under specific conditions. Exceeding this safe operating range may impact the
reliability and performance of the DC-DC converter.
The average load current for an application can typically be determined by examining the current profile during the time the device is
powered. For example, an application that is continuously powered which spends 99% of the time asleep consuming 2 µA and 1% of
the time active and consuming 10 mA has an average lifetime load current of about 102 µA.
A
verage
Lifetime
I
LOAD
(mA)
Maximum V
VREGVDD
(V)
60
5
3.3
3.8
Tj ≤ 105 °C
Figure 4.1. Lifetime average load current limit vs. Maximum input voltage
The minimum input voltage for the DC-DC in EM0/EM1 mode is a function of the maximum load current, and the peak current setting.
Figure 4.2 Transient maximum load current vs. Minimum input voltage on page 10
shows the max load current vs. input voltage for
different DC-DC peak inductor current settings.
Maximum I
LOAD
(mA)
Minimum V
VREGVDD
(V)
60
5
2.2
1.8
36
I
PEAK
= 150 mA
I
PEAK
= 90 mA
Figure 4.2. Transient maximum load current vs. Minimum input voltage
BGM220S Wireless Gecko Bluetooth
®
Module Data Sheet
Electrical Characteristics
silabs.com
| Building a more connected world.
Rev. 1.1 | 10
