36-V, 1-A, 4.17-μVRMS, RF LDO Voltage Regulator - TPS7A47

TPS7A47 (ACTIVE)

36-V, 1-A, 4.17-μVRMS, RF LDO Voltage Regulator

Description

The TPS7A47 is a family of positive voltage (+36 V), ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.

The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuit board (PCB) layout without the need of external resistors or feed-forward capacitors, thus reducing overall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI’s TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

Features

  • Input Voltage Range: +3 V to +36 V
  • Output Voltage Noise:
    4 µVRMS (10 Hz, 100 kHz)
  • Power-Supply Ripple Rejection:
    • 82 dB (100 Hz)
    • > 55 dB (10 Hz, 10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable
      Output via PCB Layout):
      • No External Feedback Resistors or
        Feed-Forward Capacitors Required
      • Output Voltage Range: +1.4 V to +20.5 V
    • Adjustable Version (TPS7A4701 only):
      • Output Voltage Range: +1.4 V to +34 V
  • Output Current: 1 A
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown
  • Available in High-Performance Thermal Package:
    5-mm × 5-mm QFN
  • Operating Temperature Range:
    –40°C to 125°C

View more

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
Additional Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS7A47
1    
Adjustable Output    
3    
36    
1.4    
34    
0.58    
307    
2.5    
4    
60    
Ceramic    
Enable
Fast Transient Response
Overcurrent Protection
Soft Start
Thermal Shutdown    
Catalog    
-40 to 125    
20VQFN    
2.10 | 1ku    

Related end equipment

  • Voltage-Controlled Oscillators (VCO)
  • Frequency Synthesizers
  • Test and Measurement
  • Instrumentation, Medical, and Audio
  • RX, TX, and PA Circuitry
  • Supply Rails for Operational Amplifiers,
    DACs, ADCs, and Other High-Precision
    Analog Circuitry
  • Post DC-DC Converter Regulation and
    Ripple Filtering
  • Base Stations and Telecom Infrastructure
  • +12-V and +24-V Industrial Buses

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WEBENCH® TPS7A47
    Min   Max   Range  
  Vin V 3.0 to 35.0V  
  Vout V 1.4 to 20.5V  
  Iout A ≤ 1A  
  Ambient Temp °C -40 to 125°C  
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