LDO regulators deliver enhanced power rail stabilisation in tight spaces

Low noise, compact, low dropout (LDO) voltage regulators from Toshiba Electronics Europe are suitable for use in a variety of portable and wearable devices, such as sensors, RF devices and IoT applications or any applications where the available board space is at a premium and high-density mounting is required.

The TCR3RM LDO voltage regulators are constructed in a plastic DFN4C package measuring 1.0 x 1.0 x 0.38mm. There are 32 product variants in the series, with fixed single output voltages in the range 0.9 to 4.5V DC.

The TCR3RM series regulators have a high ripple rejection ratio characteristic of, typically, 100dB at 1.0kHz measured with a 2.8V output. In typical regulators, ripple rejection ratio drops 20dB every 10-fold increase in frequency, but in the TCR3RM this fall is significantly less, says Toshiba. The rejection ratio at 1.0MHz and a 2.8V output is 68dB. To address electrical noise, particularly in DC/DC converters where higher switching frequencies are used to improve conversion efficiency, the ripple rejection attributes of the TCR3RM series, coupled with its low noise credentials, typically 5 microV rms at 10Hz ≤ f ≤ 100kHz, contribute to power supply line stability and voltage accuracy, claims Toshiba.

Maximum output current is 300mA, and the TCR3RM’s bandgap circuit, low pass filter and low-noise, high speed operational amplifier contribute to ripple rejection and output noise specifications.

The dropout voltage is typically 130mV at 2.8V / 300mA output. Across the series, the input voltage ranges from 1.8 to 5.5V. The regulator includes over-current protection, auto-discharge, and thermal shutdown safety features.

Toshiba Electronics Europe is the European electronic components business of Toshiba Electronic Devices and Storage. It offers European consumers and businesses a variety of hard disk drive (HDD) products and semiconductors for automotive, industrial, IoT, motion control, telecomms, networking, consumer and white goods applications. The company’s portfolio encompasses integrated wireless ICs, power semiconductors, microcontrollers, optical semiconductors, ASSPs and discrete devices ranging from diodes to logic ICs.


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