Dual 1A Low-Noise (3.8μVRMS) LDO Voltage Regulator - TPS7A88

TPS7A88 (ACTIVE)

Dual 1A Low-Noise (3.8μVRMS) LDO Voltage Regulator

 

Recommended alternative parts

  • TPS7A91  -  TPS7A91 is a single-channel, low-noise, 1-A LDO.
  • TPS7A47  -  TPS7A47 is a wide input voltage, low noise, 1-A LDO.

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 field-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.

Features

  • Two Independent LDO Channels
  • Low Output Noise: < 3.8 µVRMS (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
  • Excellent Load Transient Response
  • Adjustable Start-Up In-Rush Control
  • Selectable Soft-Start Charging Current
  • Independent Open-Drain Power-Good (PG) 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
TPS7A88 TPS7A87 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   
1    0.5    2   
1    0.5    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    2.1    2.1   
130    75    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   

WEBENCH® Designer TPS7A8801

  Min   Max Range
Vin1  V 1.40 to 6.50V
Vout1  V 0.80 to 5.00V
Iout1  A ≤ 1.00A

Vin2  V 1.40 to 6.50V
Vout2  V 0.80 to 5.00V
Iout2  A ≤ 1.00A

Ambient Temp  °C -40 to 125°C


Footprint BOM Cost Efficiency

 
'Cvdd Cldo12 Rp L1_ch1 Cin_ch1 Rfbb_ch1 Rfbt_ch1 C1_ch1 Cout_ch1 L1_ch2 Cin_ch2 Rfbb_ch2 Rfbt_ch2 C1_ch2 Cout_ch2 Cin_ch3 Cout_ch3 Rfbt_ch3 Rfbb_ch3 Cin_ch4 Cout_ch4 Rfbt_ch4 Rfbb_ch4'