1 Features
1• Two Independent LDO Channels
• 4-mm × 4-mm, 20-Pin WQFN Package
• Low Output Noise: 3.8 μVRMS (10 Hz to 100 kHz)
• Low Dropout: 180 mV (typ) at 2 A
• Wide Input Voltage Range: 1.4 V to 6.5 V
• Wide Output Voltage Range: 0.8 V to 5.2 V
• High Power-Supply Rejection Ratio (PSRR):
– 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 (PGx)
Outputs
• Stable with a 10 μF or Larger Ceramic Output
Capacitor

2 Applications
• High-Speed Analog Circuits:
– VCOs, ADCs, DACs, LVDSs
• Imaging: CMOS Sensors, Video ASICs
• Test and Measurement
• Instrumentation, Medical, and Audio
• Digital Loads Auxiliary Rails:
– SerDes, FPGAs, DSPs

3 Description
The TPS7A89 is a dual, low-noise (3.8 μVRMS), lowdropout
(LDO) voltage regulator capable of sourcing
2 A per channel with only 400 mV of maximum
dropout.
The TPS7A89 provides the flexibility of two
independent LDOs and approximately 60% smaller
solution size than two single-channel LDOs. Each
output is adjustable with external resistors from 0.8 V
to 5.2 V. The wide input-voltage range of the
TPS7A89 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 inrush
current, the TPS7A89 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 fieldprogrammable
gate arrays (FPGAs)].
The TPS7A89 is designed to power noise-sensitive
components such as those found in high-speed
communication, video, medical, or test and
measurement applications. The very low 3.8-μVRMS
output noise and wideband PSRR (40 dB at 1 MHz)
minimizes phase noise and clock jitter. These
features maximize the performance of clocking
devices, ADCs, and DACs.