Features for the TPS7A87

• 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

Description for the TPS7A87

The TPS7A87 is a dual, low-noise (3.8 µVRMS), low-dropout (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 in-rush 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.