Arround to the MCU normaly is necessary use extra chips. For example is always necessary power supply, sometime RFID and so on.
This is a guide for help you to found this chips.

INDEX:

Power Management	Led Driver	Lighting	MOS-IGBT driver	high-side – low side mosfet automotive
Intelligent Power Module	Diode	Thyristors & ACS switches	IGBT and Mosfet	high-side – low side mosfet industrial
Motor_Control	Audio_Decoder	Home_Video	Digital_Audio	Operational_Aplifier & Comparator
Amplifier	Memory plus RFID	Timing	Protection_device	Data_Conversion
Memory	Smart_Card_ICs	Sensors	Temperature_Sensor	MEMS
Digital_Broadcasting	Ethernet_PHY	Wireless	Metering	Microprocessor_Supervisors_and_Reset_ICs
Digital_Circuit	GPS	Power_Line_Modem	Solar_Applications

Power Management   Led Driver   Lighting   

MOS-IGBT driver    Intelligent Power Module

high-side low-side mosfet automotive     high-side low-side mosfet industrial

IGBT & Mosfet    Thyristors & ACS switches     Diode  

Motor Control     Amplifier    Audio Decoder   

Home Video   

Digital Audio    Operational Aplifier & Comparator  

Memory   Memory+RFID   Timing 

Protection device   Data Conversion 

Digital Broadcasting     GPS    Smart Card ICs 
  
Sensors    Temperature Sensor    MEMS 
 
Digital Circuit   Ethernet PHY    Wireless

Metering    Solar Applications     Power Line Modem

Microprocessor Supervisors and Reset ICs 





MCU 8bit - STM8

MCU 32bit - STM32 Cortex M0/3/4

STM56 (Power PC) 

SPEAr (ARM9 and CORTEX A9)