1 Features
1• Input Voltage Range: –3 V to –36 V
• Noise:
– 16 μVRMS (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 DC•
Post DC-DC Converter Regulation and Ripple
Filtering
• Test and Measurement
• Medical
• Industrial Instrumentation
• Base Stations and Telecom Infrastructure low•
12-V and 24-V Industrial Buses

3 Description
The TPS7A33 series of linear regulators are negative
voltage (–36 V), ultralow-noise (16-μVRMS, 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.