Texas Instruments has rolled out a new high-current, low-noise, low dropout (LDO) voltage regulator that claims to achieve the industry’s lowest noise at low frequency.
The 1 A TPS7A4700 features less than 4,17 μVrms output noise over the 10 Hz to 100 kHz 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 LDO uses a unique feature that enables the setting of any output voltage rail in 100 mV 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.
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 -36 V/-1 A TPS7A3301 LDO linear regulator.
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