Overview
The TPS7A8901RTJT, produced by Texas Instruments, is a dual-channel, low-noise, low-dropout (LDO) voltage regulator. This device is capable of sourcing up to 2 A per channel and features a compact 4-mm × 4-mm, 20-pin WQFN package. It is designed to provide high accuracy and low noise, making it ideal for powering sensitive analog and low-voltage devices in various applications, including high-speed analog circuits, imaging, test and measurement, and medical devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 1.4 | 6.5 | V | |
| Output Voltage Range | 0.8 | 5.2 | V | |
| Output Current | 0 | 2 | A | |
| Dropout Voltage | 180 | 400 | mV | |
| Output Noise (RMS) | 3.8 | µV | ||
| Power-Supply Rejection Ratio (PSRR) | 75 dB @ DC, 40 dB @ 100 kHz, 40 dB @ 1 MHz | |||
| Output Voltage Accuracy | 1% | |||
| Junction Temperature Range | -40 | 125 | °C | |
| Package Type | WQFN (20-pin) | |||
| Package Size | 4 mm × 4 mm |
Key Features
- Two independent LDO channels, each capable of sourcing up to 2 A.
- Low output noise of 3.8 µVRMS (10 Hz to 100 kHz).
- Low dropout voltage of 180 mV (typ) at 2 A.
- Wide input voltage range from 1.4 V to 6.5 V.
- Wide output voltage range from 0.8 V to 5.2 V, adjustable with external resistors.
- High power-supply rejection ratio (PSRR): 75 dB at DC, 40 dB at 100 kHz, and 40 dB at 1 MHz.
- 1% output voltage accuracy over line, load, and temperature.
- Excellent load transient response.
- Adjustable start-up in-rush control and selectable soft-start charging current.
- Independent open-drain power-good (PGx) outputs.
- Stable with a 10 µF or larger ceramic output capacitor.
Applications
- High-speed analog circuits: VCOs, ADCs, DACs, LVDSs.
- Imaging: CMOS sensors, video ASICs.
- Test and measurement.
- Instrumentation, medical, and audio devices.
- Digital loads auxiliary rails: SerDes, FPGAs, DSPs.
Q & A
- What is the maximum output current per channel of the TPS7A8901RTJT? The maximum output current per channel is 2 A.
- What is the typical dropout voltage of the TPS7A8901RTJT at 2 A? The typical dropout voltage is 180 mV at 2 A.
- What is the output noise of the TPS7A8901RTJT? The output noise is 3.8 µVRMS (10 Hz to 100 kHz).
- What is the input voltage range of the TPS7A8901RTJT? The input voltage range is from 1.4 V to 6.5 V.
- What is the output voltage range of the TPS7A8901RTJT? The output voltage range is from 0.8 V to 5.2 V, adjustable with external resistors.
- What is the power-supply rejection ratio (PSRR) of the TPS7A8901RTJT? The PSRR is 75 dB at DC, 40 dB at 100 kHz, and 40 dB at 1 MHz.
- What is the output voltage accuracy of the TPS7A8901RTJT? The output voltage accuracy is 1% over line, load, and temperature.
- What type of package does the TPS7A8901RTJT come in? The device comes in a 4-mm × 4-mm, 20-pin WQFN package.
- What are some typical applications of the TPS7A8901RTJT? Typical applications include high-speed analog circuits, imaging, test and measurement, instrumentation, medical devices, and digital loads auxiliary rails.
- How does the TPS7A8901RTJT handle start-up in-rush current? The device features adjustable start-up in-rush control and selectable soft-start charging current.
