1 Features
1• Two Independent LDO Channels
• Low Output Noise: 3.8 μVRMS (10 Hz–100 kHz)
• Low Dropout: 100 mVMAX at 0.5 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 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 (PGx)
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:
– VCOs, ADCs, DACs, LVDSs
• Imaging: CMOS Sensors, Video ASICs
• Test and Measurement
• Instrumentation and Medical
• Professional Audio

3 Description
The TPS7A87 is a dual, low-noise (3.8 μVRMS), lowdropout
(LDO) voltage regulator capable of sourcing
500 mA per channel with only 100 mV of maximum
dropout.
The TPS7A87 provides the flexibility of two
independent LDOs and approximately 30% 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
TPS7A87 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 TPS7A87 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), complementary metal oxide semiconductor
(CMOS) sensors, and video application-specific
integrated circuits (ASICs)].
The TPS7A87 is designed to power noise-sensitive
components such as those found in instrumentation,
medical, video, professional audio, test and
measurement, and high-speed communication
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.