TPS7A39
- Positive and Negative LDOs in One Package
- Wide Input Voltage Range: ±3.3 V to ±33 V
- Wide Output Voltage Range:
- Positive Range: 1.2 V to 30 V
- Negative Range: –30 V to 0 V
- Output Current: 150 mA per Channel
- Monotonic Start-Up Tracking
- High Power-Supply Rejection Ratio (PSRR):
- 69 dB (120 Hz)
- ≥ 50 dB (10 Hz to 2 MHz)
- Output Voltage Noise: 21 µVRMS (10 Hz–100 kHz)
- Buffered 1.2-V Reference Output
- Stable With a 10-µF or Larger Output Capacitor
- Single Positive-Logic Enable
- Adjustable Soft-Start In-Rush Control
- 3-mm × 3-mm, 10-Pin WSON Package
- Low Thermal Resistance: RθJA = 44.4°C/W
- Operating Temperature Range: –40 to +125°C
The TPS7A39 device is a dual, monolithic, high-PSRR, positive and negative low-dropout (LDO) voltage regulator capable of sourcing (and sinking) up to 150 mA of current. The regulated outputs can be independently and externally adjusted to symmetrical or asymmetrical voltages, making this device an ideal dual, bipolar power supply for signal conditioning.
Both positive and negative outputs of the TPS7A39 ratiometrically track each other during startup to mitigate floating conditions and other power-supply sequencing issues common in dual-rail systems. The negative output can regulate up to 0 V, extending the common-mode range for single-supply amplifiers. The TPS7A39 also features high PSRR to eliminate power-supply noise, such as switching noise, that can compromise signal integrity.
Both regulators are controlled with a single positive logic enable pin for interfacing with standard digital logic. A capacitor-programmable soft-start function controls in-rush current and start-up time. The internal reference voltage of the TPS7A39 can be overridden with an external reference to enable precision outputs, output voltage margining, or to track other power supplies. Additionally, the TPS7A39 has a buffered reference output that can be used as a voltage reference for other components in the system.
These features make the TPS7A39 a robust, simplified solution to power operational amplifiers, digital-to-analog converters (DACs), and other precision analog circuitry.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS7A39 Dual, 150-mA, Wide VIN Positive and Negative LDO Voltage Regulator datasheet (Rev. A) | PDF | HTML | 2017年 9月 15日 |
| White paper | Parallel LDO Architecture Design Using Ballast Resistors | PDF | HTML | 2022年 12月 14日 | |
| White paper | Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast | PDF | HTML | 2022年 12月 13日 | |
| Circuit design | Powering a dual-supply op amp circuit with one LDO (Rev. A) | 2019年 3月 7日 | ||
| Technical article | Improving sensor DAQ performance using the PRU-ICSS for grid protection and contro | PDF | HTML | 2018年 10月 9日 | |
| Technical article | Interfacing multiple ADCs to a single processor for grid protection and control | PDF | HTML | 2018年 9月 13日 | |
| Technical article | How to choose the right kind of DC/DC conversion for your appliance design | PDF | HTML | 2017年 12月 4日 | |
| Application brief | Dual Bipolar Power-Supply Considerations for Amplifiers | 2017年 8月 1日 | ||
| EVM User's guide | TPS7A39EVM-865 Evaluation Module User's Guide | 2017年 7月 20日 |
設計與開發
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TPS7A39EVM-865 — TPS7A39 雙路、150mA、寬輸入電壓正負 LDO 穩壓器評估模組
The TPS7A39EVM-865 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS7A39 150-mA tracking positive/negative low-dropout (LDO) voltage regulator.
The EVM circuit board is configured to be a reference design for engineering applications (...)
| 封裝 | 引腳 | 下載 |
|---|---|---|
| WSON (DSC) | 10 | 檢視選項 |
訂購與品質
- RoHS
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- 資格摘要
- 進行中可靠性監測
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