Texas Instruments TPS7A39 Dual-Output LDO – Precision Power for Analog Systems
De TPS7A39 van IC-fabrikant is a high-performance, dual-channel low-dropout (LDO) regulator engineered for low-noise and high-PSRR performance. This device enables split-rail voltage generation with independently adjustable positive and negative outputs. Its compact integration of dual regulators makes it ideal for systems requiring low-noise power rails, such as data converters, op-amps, and analog front ends.
Electrical Specifications and Key Features
| Parameter | Positive Output | Negative Output |
|---|---|---|
| Bereik uitgangsspanning | +2.7 V to +6.5 V | -2.7 V to -6.5 V |
| Output Noise (10 Hz to 100 kHz) | 4.8 µVrms | 15 µVrms |
| PSRR at 1 kHz | 70 dB | |
| Uitgangsstroom | Up to 150 mA per output | |
| Uitvalvoltage | Typically < 350 mV | |
| Pakket | WSON-10 | |
Why Choose TPS7A39 Over Conventional LDOs
Unlike standard single-channel LDOs, the TPS7A39 offers two independent, low-noise power rails in one compact package. This integration reduces board space, simplifies layout, and eliminates the need for discrete negative rail generation. The superior noise and PSRR performance directly enhance the performance of sensitive analog circuits and instrumentation.
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Design Advantages and Functional Highlights
- Dual Output Architecture: Generate both positive and negative supply rails from a single input source.
- Exceptional Low Noise: Ensures minimal interference with precision analog and mixed-signal devices.
- Thermal and Current Protection: Built-in safety features safeguard against overcurrent and overheating conditions.
- Highly Integrated: Saves PCB area and reduces BOM by integrating two regulators in one package.
Typical Use Cases
- Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) power supplies
- Low-noise operational amplifier biasing in test and measurement instruments
- Medical imaging and patient monitoring equipment
- RF transceiver baseband power rails
Veelgestelde vragen (FAQ)
Can the TPS7A39 power precision analog circuits?
Yes, the low output noise and high PSRR make it ideal for powering ADCs, DACs, and op-amps used in sensitive analog systems.
What makes TPS7A39 unique compared to other dual-output regulators?
It supports both positive and negative voltage rails in a single compact device, eliminating the need for inverting charge pumps or discrete LDOs.
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Is TPS7A39 suitable for medical equipment?
Absolutely. Its low noise, high PSRR, and thermal protection make it a reliable choice for medical imaging and sensing applications.
What package is TPS7A39 available in?
The device comes in a space-saving WSON-10 package, ideal for compact PCBs and thermal efficiency.
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Can I adjust the output voltages?
Yes, both outputs are independently adjustable using external resistor dividers, offering flexibility across a wide range of application needs.
