Overview
The TPS7A88, produced by Texas Instruments, is a dual, low-noise, low-dropout (LDO) voltage regulator. This component is designed to provide two independent LDO channels, each capable of sourcing up to 1 A of current with a maximum dropout voltage of 200 mV. The TPS7A88 is particularly suited for powering sensitive analog and low-voltage devices, 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 of 1.4 V to 6.5 V and adjustable output voltage range from 0.8 V to 5.0 V make it versatile for various applications.
Key Specifications
| Parameter | Min | |||
|---|---|---|---|---|
| Input Supply Voltage Range (VINx) | 1.4 | 6.5 | V | |
| Output Voltage Range (VOUTx) | 0.8 | 5.0 | V | |
| Output Current (IOUTx) | 0 | 1 | A | |
| Input Capacitor (CINx) | 10 | μF | ||
| Output Capacitor (COUTx) | 10 | μF | ||
| Noise Reduction Capacitor (CNR/SSx) | 1 | μF | ||
| Power-Good Pullup Resistance (RPG) | 10 | 100 | kΩ | |
| Junction Temperature Range (TJ) | -40 | 125 | °C | |
| Junction-to-Ambient Thermal Resistance (RθJA) | 33 | °C/W |
Key Features
- Low Output Noise: Less than 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 1 MHz
- 1.0% Accuracy Over Line, Load, and Temperature
- Excellent Load Transient Response
- Adjustable Start-Up In-Rush Control
- Selectable Soft-Start Charging Current
- Independent Open-Drain Power-Good (PG) Outputs
- Stable with a 10-µF or Larger Ceramic Output Capacitor
- 4-mm × 4-mm, 20-Pin WQFN Package
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
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.
- What is the output voltage range of the TPS7A88?
The output voltage range is from 0.8 V to 5.0 V, adjustable with external resistors.
- What is the typical output noise of the TPS7A88?
The typical output noise is less than 3.8 µVRMS (10 Hz–100 kHz).
- What is the dropout voltage of the TPS7A88?
The maximum dropout voltage is 200 mV at 1 A.
- Does the TPS7A88 have power-good indicators?
Yes, it has independent open-drain power-good (PG) outputs for each channel.
- What type of package does the TPS7A88 come in?
The TPS7A88 comes in a 4-mm × 4-mm, 20-Pin WQFN package.
- What is the junction temperature range of the TPS7A88?
The junction temperature range is from -40°C to 125°C.
- What is the thermal resistance of the TPS7A88?
The junction-to-ambient thermal resistance (RθJA) is 33°C/W.
- What are some typical applications of the TPS7A88?
Typical applications include high-speed analog circuits, imaging, test and measurement, instrumentation, medical, audio, and digital loads such as SerDes, FPGA, and DSP.
