TI intros low dropout regulators

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TI intros low dropout regulators

It offers an auto low-power mode that combines ultra-low quiescent current of less than 8 uA with fast transient response while maintaining low noise and a high power supply rejection ratio (PSRR)

Monday, October 05, 2009

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BANGALORE, INDIA: Texas Instruments Incorporated today introduced a family of 200-mA, low dropout regulators (LDOs), which offer an auto low-power mode that combines ultra-low quiescent current of less than 8 uA with fast transient response while maintaining low noise and a high power supply rejection ratio (PSRR).

With 70 percent lower quiescent current than existing solutions, the new LDOs help increase battery runtime without sacrificing performance in noise-sensitive applications, such as smart phones, MP3 players, RF modules, remote controls, ZigBee network systems and handheld consumer devices, said a press release.

Typical high-performance LDOs require the load quiescent current to be 25 uA or less. Auto low-power mode allows the TPS727xx to achieve less than 8 uA without an additional mode pin and automatically switches to and from low power depending on load current.

In addition, the use of auto low-power mode eliminates the need to modify software drivers to control the mode pin, which speeds and simplifies the design process. It also reduces cost by eliminating the need for a general purpose input/output (GPIO) pin and overhead firmware.

It features a low power operation with innovative auto low-power mode, ultra-low quiescent current of 8 uA, fast transient response 50mV for 200mA, low noise 32uVRMS and high PSRR 70dB at 1kHz helping increase battery runtime without sacrificing noise.

It also enables use of small 1.0 uF ceramic capacitors, which allows for a smaller overall solution, the release added.

©Reuters

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