Texas – New LDO linear voltage regulator with industry’s lowest noise at low frequency (TPS7A4700 LDO)

Texas Instruments (TI) has introduced a high-current, ultra low-noise, low dropout (LDO) voltage regulator, which says the company, achieves the industry’s lowest noise at low frequency.

The 1A TPS7A4700 LDO linear regulator features less than 4.17uVrms output noise over the 10Hz to 100kHz bandwidth, eliminating the need for expensive and bulky filtering in a wide range of high-performance applications, including telecom, industrial, RF, medical, avionics and military.

The TPS7A4700 LDO uses a novel new feature that enables the setting of any output voltage rail in 100mV increments with simple printed circuit board (PCB) layout changes. This eliminates the need for expensive, high accuracy, external feedback resistors, which saves board area and reduces component count when compared to existing solutions.

With digital control methods such as I2C or PMBus, the user can program the output voltage by selecting to either ground or open the binary-weighted device pins.

For systems where both positive and negative voltage rails are required, the TPS7A4700 can be used together with TI’s -36V/-1A TPS7A3301 LDO linear regulator.