KW47
NXP Semiconductors
The KW47 integrates a DC-DC buck converter, a couple of low-dropout regulators, and a programmable solid-state switch to turn on/off the KW47 power domains.
Application NoteNxp
Power Management Hardware for the KW47
This application note describes the power management modules for the NXP KW47 microcontroller, including its integrated DC-DC buck converter, LDO regulators, and power domains.
Overview
This document provides a detailed overview of the power management architecture integrated into the NXP KW47 microcontroller. It covers the configuration and usage of the on-chip DC-DC buck converter, low-dropout (LDO) regulators (LDO-CORE and LDO-SYS), and the programmable smart power switch. The guide explains how independent power domains—including VDD_ANA, VDD_IO, VDD_SYS, VDD_CORE, and VDD_RF—are assigned to specific on-chip peripherals. Additionally, it outlines various power supply strategies such as low-cost direct supply configurations, power-efficient DC-DC buck modes, and advanced power-saving techniques using the smart power switch and retention SRAM for battery-operated wireless applications.
Use Cases
- Designing power-efficient wireless applications using the KW47 microcontroller.
- Configuring internal DC-DC and LDO regulators for optimized battery life.
- Managing independent power domains for RF, analog, and core processing hardware.
- Implementing low-power sleep and retention modes using the integrated smart power switch.
Topics
KW47
NXP
power management
DC-DC buck converter
LDO
smart power switch
power domains
VDD_CORE
VDD_SYS
wireless microcontroller
voltage regulators
Referenced Parts
I_leakage2
Maxim
I_leakage2 Maximum leakage current when V_
| KW47 | NXP Semiconductors | The KW47 integrates a DC-DC buck converter, a couple of low-dropout regulators, and a programmable solid-state switch to turn on/off the KW47 power domains. |
| I_leakage2 | Maxim | I_leakage2 Maximum leakage current when V_ |