Small surface mount LDO regulators lower power consumption

22nd March 2019

Toshiba

Lanna Deamer

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Datasheet

Toshiba Electronics has launched two new series of small surface mount LDO regulators for application in the power supply of mobile devices, imaging and audio-visual products. The 40 regulators in the TCR5BM series support a dropout voltage (V_DO) as low as 100mV and a maximum output current of 500mA, while 40 additional devices in the TCR8BM series extend options with a 170mV V_DO and 800mA output current. The TCR5BM and TCR8BM series are both available with VOUT options in the range 0.8-3.6V.

Both series are suited to applications that include power supplies for microcontrollers (MCU), RF devices, and camera CMOS sensors in mobile devices or imaging and audio-visual equipment, which increasingly require lower voltage supplies in the region of 1.0V.

By using a low on-resistance N-channel MOSFET fabricated with the latest generation process and external bias voltage, both series have significantly reduced the dropout voltage that causes power loss, to approximately 33% less than Toshiba’s current products. These levels represent the lowest dropout voltages in the industry.

In addition, with a 98dB ripple rejection ratio, the new products deliver stable operation resistant to high frequency noise from the external environment and DC/DC converters, both of which are potential causes of improper operation. They also deliver a fast load transient response that prevents malfunctioning due to swift switching of IC operation modes.

Quiescent current (TCR5BM=19μA, TCR8BM=20μA) is about 50% lower than other high current LDO regulators in the market, enabling lower power consumption in applications and thereby delivering longer operating times for battery-driven devices.

Both series are housed in the small surface mount DFN5B package with a footprint of just 1.2x1.2mm.