Toshiba Unveils 32 New LDO Regulators
Ripple rejection ratio of 68dB even at noise levels exceeding 100kHz


Thirty-two new LDO regulators are being released to stabilize the DC power line output of mobile devices such as smartphones and wearable devices.

Toshiba announced on the 30th that it has launched and begun shipping the TCR3RM series.

The TCR3RM series is a low-noise, high-speed operational amplifier that combines a bandgap circuit and a low-pass filter to pass only extremely low frequencies, resulting in high ripple rejection and low output noise voltage.

The new product line has a maximum output current of 300 mA. The output voltage range is 0.9 to 4.5 V, allowing users to select the output voltage to suit their specific application.

Composed of a compact 1mm x 1mm DFN4C package, it is suitable for camera and audio applications. It is also ideal for RF circuits used in power supply lines in mobile devices requiring high-density mounting, such as smartphones and wearable devices.

In a typical LDO regulator, the ripple rejection ratio drops by about 20 dB when the noise frequency of the input voltage exceeds 1 kHz, and by 40 dB when the noise frequency exceeds 100 kHz. As a result, if the noise frequency generated in the DC/DC converter circuit or similar circuit exceeds 100 kHz, the noise cannot be properly removed.

The TCR3RM series provides sufficient ripple rejection ratio (68dB) and output noise voltage (5μVrms) even when the noise frequency exceeds 100kHz.