VDCDC_IN (V)
0.8
1.0
1.2
1.4
Boost Mode Maximum Current Capability on VDD_1P8
1.6
1.8
50
0
10
27
45
20
10
20
30
40
VDD_1P8=3.0 V
VDD_1P8=1.8 V
IDD_1P8_Boost
(mA)
Figure 18. Maximum IDD_1P8_boost versus VDCDC_IN input voltage
The above graph, Maximum IDD_1P8_buck versus VDCDC_IN voltage, is representative of most devices in this
series. However, some devices deviate from these limits and you should refer to the device-specific data sheet
as to the actual limits at 1.8 V and 3.0 V. Also note, that other conditions, such as VDD_1P8 voltage may affect
these limits.
NOTE
6.3 DC-DC timings
6.3.1 Turn on time
The below oscilloscope plot shows the timing when the microcontroller is powered on. No extra loads were present in this scenario.
For more timing details, refer to the device-specific data sheet.
In the test case below, VDCDC_IN is 3.6 V and VDD_1P8 is configured to generate 1.8 V.
NXP Semiconductors
Current estimation and efficiency report
MKW4xZ/3xZ/3xA/2xZ DC-DC Power Management, Rev. 3, 04 June 2021
Application Note
23 / 28
