Overview
The TPS7A88, produced by Texas Instruments, is a dual, low-noise, low-dropout (LDO) voltage regulator. This device is capable of sourcing 1 A per channel with a maximum dropout of 200 mV. It features two independent LDO channels, each adjustable with external resistors from 0.8 V to 5.0 V. The TPS7A88 is designed to power noise-sensitive components such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs). Its wide input-voltage range supports operation from 1.4 V to 6.5 V, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Supply Voltage Range | 1.4 | 6.5 | V | |
| Output Voltage Range | 0.8 | 5.0 | V | |
| Output Current | 0 | 1 | A | |
| Dropout Voltage | 200 | mV | ||
| Output Noise (RMS) | 3.8 | µV | ||
| Power-Supply Rejection Ratio (PSRR) | 75 | dB at DC | ||
| PSRR at 100 kHz | 40 | dB | ||
| PSRR at 1 MHz | 40 | dB | ||
| Junction Temperature Range | -40 | 125 | °C | |
| Package Type | WQFN (20) | |||
| Package Size | 4.00 mm × 4.00 mm |
Key Features
- Two independent LDO channels, each capable of sourcing 1 A.
- Low output noise: < 3.8 µVRMS (10 Hz–100 kHz).
- Low dropout: 200 mV (Max) at 1 A.
- Wide input voltage range: 1.4 V to 6.5 V.
- Wide output voltage range: 0.8 V to 5.0 V, adjustable with external resistors.
- High power-supply ripple rejection: 75 dB at DC, 40 dB at 100 kHz, and 40 dB at 1 MHz.
- 1% output voltage accuracy over line, load, and temperature.
- Soft-start capabilities to reduce inrush current.
- Selectable soft-start charging current.
- Independent open-drain power-good (PG) outputs.
- Stable with a 10-µF or larger ceramic output capacitor.
Applications
- High-speed analog circuits: VCO, ADC, DAC, LVDS.
- Imaging: CMOS sensors, video ASICs.
- Test and measurement.
- Instrumentation, medical, and audio.
- Digital loads: SerDes, FPGA, DSP.
- RF and radar power in automotive applications.
- Automotive ADAS ECUs.
- Telematic control units.
- Infotainment and clusters.
Q & A
- What is the maximum output current per channel of the TPS7A88?
The TPS7A88 can source up to 1 A per channel. - What is the input voltage range of the TPS7A88?
The input voltage range is from 1.4 V to 6.5 V. - How much output noise does the TPS7A88 produce?
The TPS7A88 produces less than 3.8 µVRMS of output noise. - What is the dropout voltage of the TPS7A88?
The maximum dropout voltage is 200 mV. - Can the output voltage of the TPS7A88 be adjusted?
Yes, the output voltage can be adjusted with external resistors from 0.8 V to 5.0 V. - What is the power-supply rejection ratio (PSRR) of the TPS7A88?
The PSRR is 75 dB at DC, 40 dB at 100 kHz, and 40 dB at 1 MHz. - Does the TPS7A88 have power-good indicators?
Yes, it has independent open-drain power-good (PG) outputs. - What type of package does the TPS7A88 come in?
The TPS7A88 comes in a 4-mm × 4-mm, 20-pin WQFN package. - What are some typical applications of the TPS7A88?
Typical applications include high-speed analog circuits, imaging, test and measurement, instrumentation, medical and audio devices, and digital loads such as SerDes, FPGA, and DSP. - Does the TPS7A88 support soft-start capabilities?
Yes, it has soft-start capabilities to reduce inrush current and selectable soft-start charging current.
