Texas Instruments Introduces First -36V, 200mA LDO

Texas Instruments Inc. (TI)® introduced what it says is the industry’s first -36V low dropout regulators (LDO). The TPS7A30, paired with the positive voltage TPS7A49, provides designers with a total solution for powering precision analog applications. The devices feature ultra-high power supply rejection ratio (PSRR) performance and as low as 16µVrms of output noise. The TPS7A30 generates 200mA, while the TPS7A49 manages 150mA.

"Customers designing high-precision equipment need clean bipolar power rails for powering operational amplifiers, analog-to-digital converters or digital-to-analog converters," said Sami Kiriaki, Senior Vice President and Manager over TI’s Power Management business unit. "The TPS7A30 and TPS7A49 power for precision analog LDOs help meet that requirement with wide input voltages, lowest noise and maximum amount of transient headroom."

The TPS7A30/TPS7A49 linear regulator family is stable with any output capacitance greater than 2.2µF. The LDOs come in an adjustable version with an output voltage ranging from 1.22 to 34V. The LDOs are designed for noise-sensitive applications, such as test equipment; industrial, networking and telecom equipment; base stations; microwave and radio links; noise filtering for receive, transmit and power amplifiers; and medical applications.

Key features and benefits of the TPS7A30 and TPS7A49 include: wide input voltages for robust tolerance of high line-voltage transients: TPS7A30, -3.0V to - 36V, TPS7A49, +3.0V to +36V; 1.5% nominal accuracy over load, line and temperature for better precision for VCOs, PLLs and ADCs; stable with >2µF ceramic output capacitor for smaller size and lower cost versus tantalums; low noise/high PSRR for improved range in RF applications, filters, and handling of dc-dc spikes; output noise as low as 16 uVRMS; and PSRR of 72dB at 1kHz 55dB 10kHz to 700kHz.

These LDOs for powering precision analog join several new power management devices designed for the industrial market, including the TPS54260, a 60V, 2.5-A SWIFT converter; TPS40057 wide-input synchronous PWM buck controller; and bq24610/7, switch-mode standalone battery charger ICs for 5 to 28V input applications.

The TPS7A30 and TPS7A49 are available now in MSOP-8 PowerPAD™ packaging and are priced at $1.50 and $1.10, respectively, in quantities of 1,000. The TPS7A30_49EVM-567 evaluation module is available and is priced at $20.