MCU power supply circuit

Example of a stable power supply circuit for MCU

MCU power supply circuit


Small surface mount LDO regulator

Part number TCR15AG Series TCR13AG Series TCR8BM Series TCR5BM Series TCR5RG Series TCR3RM Series TCR3U Series TCR2L Series TAR5 Series
Features Low dropout voltage
High PSRR Low noise Low current consumption Low current consumption 15V Input voltage Bipolar type
IOUT (Max) [A] 1.5 1.3 0.8 0.5 0.3 0.2

PSRR (Typ.) [dB]

@f = 1 kHz

95 90 98 98 100 100 70 - 70
IB (Typ.) [μA] 25 56 20 19 7 7 0.34 1 170

MCU TXZ+TM3A Series M3H Group

Series Group Function
TXZ+™3A Series M3H Group

Arm® Cortex®-M3, 120 MHz operation,

2.7 to 5.5 V

MCU TX03 Series M370 Group / TX04 Series M470 Group / TXZ+TM4A Series M4K Group 

Series Group Function
TXZ+™4A Series M4K Group

Arm® Cortex®-M4, 160 MHz operation

4.5 to 5.5 V, 3 motor control (Max), Data Flash

TX04 Series M470 Group

Arm® Cortex®-M4, 120 MHz operation

4.5 to 5.5 V, 2 motor control (Max)

TX03 Series M370 Group 

Arm® Cortex®-M3, 80 MHz operation

4.5 to 5.5 V, 2 motor control (Max)


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* TXZ+™ is a trademark of Toshiba Electronic Devices & Storage Corporation.
* Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
* Other company names, product names, and service names may be trademarks of their respective companies.