High-Current (4A), High-Accuracy (1%), Low-Noise (4.4μVRMS), LDO Voltage Regulator - TPS7A85

TPS7A85 (ACTIVE)

High-Current (4A), High-Accuracy (1%), Low-Noise (4.4μVRMS), LDO Voltage Regulator

 

Recommended alternative parts

  • TPS7A85A  -  The TPS7A85A is a 4-A LDO regulator with excellent accuracy (0.75%). This is an improved p2p upgrade to the TPS7A85.
  • TPS7A89  -  The TPS7A89 is a dual 2-A LDO regulator with improved noise (3.8µVrms) in a very small package (4 mm x 4 mm).

Description

The TPS7A85 is a low-noise (4.4 µVRMS), low-dropout linear regulator (LDO) capable of sourcing 4 A with only 240 mV of maximum dropout. The device output voltage is pin-programmable from 0.8 V to 3.95 V and adjustable from 0.8 V to 5.0 V using an external resistor divider.

The combination of low-noise (4.4 µVRMS), high-PSRR, and high output current capability makes the TPS7A85 ideal to power noise-sensitive components such as those found in high-speed communications, video, medical, or test and measurement applications. The high performance of the TPS7A85 limits power-supply-generated phase noise and clock jitter, making this device ideal for powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. Specifically, RF amplifiers benefit from the high-performance and 5.0-V output capability of the device.

For digital loads [such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-input voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.75% over load and temperature), remote sensing, excellent transient performance, and soft-start capabilities of the TPS7A85 ensure optimal system performance.

The versatility of the TPS7A85 makes the device a component of choice for many demanding applications.

Features

  • Low Dropout: 150 mV (typ) at 4 A
  • 1% (max) Accuracy Over Line, Load, and Temperature
  • Output Voltage Noise:
    • 4.4 µVRMS at 0.8-V Output
    • 8.4 µVRMS at 5.0-V Output
  • Input Voltage Range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • ANY-OUT Operation:
    • Output Voltage Range: 0.8 V to 3.95 V
  • Adjustable Operation:
    • Output Voltage Range: 0.8 V to 5.0 V
  • Power-Supply Ripple Rejection:
    • 40 dB at 500 kHz
  • Excellent Load Transient Response
  • Adjustable Soft-Start In-Rush Control
  • Open-Drain Power-Good (PG) Output
  • Stable with a 47-µF or Larger Ceramic Output Capacitor
  • Operating Temperature Range:
    –40ºC to +125°C
  • 3.5-mm × 3.5-mm, 20-Pin VQFN

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Parametrics Compare all products in Single Channel LDO

 
Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
PSRR @ 100KHz (dB)
Output Capacitor Type
Rating
Operating Temperature Range (C)
Pin/Package
TPS7A85 TPS7A8300 TPS7A84
4    2    3   
Adjustable Output
Programmable Output   
Adjustable Output
Programmable Output   
Adjustable Output
Programmable Output   
1.1    1.1    1.1   
6.5    6.5    6.5   
0.8    0.8    0.8   
5    5    5   
2.8    2.8    2.8   
150    85    110   
1    1    1   
4.4    6    4.4   
25    40    25   
Ceramic    Ceramic    Ceramic   
Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125   
20VQFN    20VQFN
20VQFN   
20VQFN   
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New! Interactive Design
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WEBENCH® Designer TPS7A85

  Min   Max Range
Vin  V 1.4 to 6.5V
Vout  V 0.8 to 5.0V
Iout  A ≤ 4A
Ambient Temp  °C -40 to 125°C


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