Highly efficient LDOs extend operating times for battery-driven devices
Toshiba Electronics Europe 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 (VDO) as low as 100 mV and a maximum output current of 500 mA, while 40 additional devices in the TCR8BM series extend options with a 170 mV VDO and 800 mA output current. The TCR5BM and TCR8BM series are both available with VOUT options in the range 0.8 V to 3.6 V.
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 1.0 V.
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.
|Example of Application Circuit.|
In addition, with a 98 dB 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=19 μA, TCR8BM=20 μA) 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 1.2 × 1.2 mm.
Mass production started progressively from January 2019 and shipments begin today.
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