1 Features

• Two Independent LDO Channels
• Low Output Noise: < 3.8 µV_RMS (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
• High Power-Supply Ripple Rejection:
  • 75 dB at DC
  • 40 dB at 100 kHz
  • 40 dB at 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

2 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™

3 Description

The TPS7A88 is a dual, low-noise (3.8 µV_RMS), low-dropout (LDO) voltage regulator capable of sourcing 1 A per channel with only 200 mV of maximum dropout.

The TPS7A88 provides the flexibility of two independent LDOs and approximately 50% smaller solution size than two single-channel LDOs. Each output is adjustable with external resistors from 0.8 V to 5.0 V. The TPS7A88 wide input-voltage range supports operation as low as 1.4 V and up to 6.5 V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A88 is ideal for powering sensitive analog 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)].

The TPS7A88 is designed to power up noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications. The very low 4-µV_RMS output noise and wideband PSRR (40 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application Diagram