1 Features

1• 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 in•

Excellent Load Transient Response

• Adjustable Start-Up In-Rush Control

• Selectable Soft-Start Charging Current

• Independent Open-Drain Power-Good (PG) fieldOutputs

• Stable with a 10-μF or Larger Ceramic Output

Capacitor high•

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 μVRMS), 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 fieldOutputs

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-μVRMS

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.