Dual 500mA Low-Noise (3.8-μVRMS) LDO Voltage Regulator - TPS7A87

TPS7A87 (ACTIVE)

Dual 500mA Low-Noise (3.8-μVRMS) LDO Voltage Regulator

 

Recommended alternative parts

  • TPS7A90  -  TPS7A90 is 500mA, low noise (4.7uVrms) LDO in a small package (2.5 mm x 2.5mm)

Description

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.

Features

  • 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

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Parametrics Compare all products in Multi-Channel LDO

 
Regulated Outputs (#)
Output Options
Features
Iout (Max) (A)
Iout2 (A)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Vout2 (Min) (V)
Vout2 (Max) (V)
Output Capacitor Type
Iq (Typ) (mA)
Vdo (Typ) (mV)
PSRR @ 100KHz (dB)
Accuracy (%)
Noise (uVrms)
Rating
Operating Temperature Range (C)
Pin/Package
TPS7A87 TPS7A88 TPS7A89
2    2    2   
Adjustable Output    Adjustable Output    Adjustable Output   
Enable
Foldback Overcurrent Protection
Power Good
Soft Start   
Enable
Foldback Overcurrent Protection
Power Good
Soft Start   
Enable
Foldback Overcurrent Protection
Power Good
Soft Start   
0.5    1    2   
0.5    1    2   
1.4    1.4    1.4   
6.5    6.5    6.5   
0.8    0.8    0.8   
5.2    5.2    5.2   
0.8    0.8    0.8   
5.2    5.2    5.2   
Ceramic    Ceramic    Ceramic   
2.1    2    2.1   
75    130    260   
48    48    35   
1    1    1   
3.8    3.8    3.8   
Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125   
20QFN    20QFN    20QFN