1 Features

• Input Voltage Range: –3 V to –36 V
• Noise:
  • 16 μV_RMS (10 Hz to 100 kHz)
• Power-Supply Ripple Rejection:
  • 72 dB (10 kHz)
• Adjustable Output: –1.18 V to –33 V
• Maximum Output Current: 1 A
• Stable With Ceramic Capacitors ≥ 10 μF
• Built-In Current-Limit and Thermal Shutdown Protection
• Available in an External Heatsink-Capable, High Thermal Performance TO-220 Package
• Operating Temperature Range:
  –40°C to 125°C

2 Applications

• Supply Rails for Operational Amplifiers, DACs, ADCs, and Other High-Precision Analog Circuitry
• Audio
• Post DC-DC Converter Regulation and Ripple Filtering
• Test and Measurement
• Medical
• Industrial Instrumentation
• Base Stations and Telecom Infrastructure
• 12-V and 24-V Industrial Buses

3 Description

The TPS7A33 series of linear regulators are negative voltage (–36 V), ultralow-noise (16-μV_RMS, 72-dB PSRR) linear regulators capable of sourcing a maximum load of 1 A.

The TPS7A33 series include a complementary metal oxide semiconductor (CMOS) logic-level-compatible enable pin (EN) to allow for user-customizable power management schemes. Other features available include built-in current limit and thermal shutdown features to protect the device and system during fault conditions.

The TPS7A33 family is designed using bipolar technology primarily for high-accuracy, high-precision instrumentation applications, where clean voltage rails are critical to maximize system performance. This feature makes it ideal to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A33 family of linear regulators is suitable for post DC-DC converter regulation. By filtering out the output voltage ripple inherent to DC-DC switching conversion, maximum system performance is ensured in sensitive instrumentation, medical, test and measurement, audio, and RF applications.

For applications where positive and negative high-performance rails are required, consider the TPS7A4700 positive high-voltage, ultralow-noise, low-dropout linear regulator as well.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic