1A, Low Noise (4.17μVrms), High Voltage Low-Dropout Linear Regulator

Recommended alternative parts

  • TPS7A4701  -  Same as TPS7A4700 but has an option to set output voltage via external resistors.


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.


  • 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

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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
Additional Features
Operating Temperature Range (C)
Approx. Price (US$)
TPS7A4700 TPS7A3301 TPS7A4701
1     1     1    
Programmable Output     Adjustable Output
Negative Output    
Adjustable Output
Programmable Output    
3     -36     3    
36     -3     36    
1.4     -33     1.4    
20.5     -1.2     34    
0.58     0.21     0.58    
216     290     307    
2.5     2.5     2.5    
4     16     4    
68     64     60    
Ceramic     Ceramic     Ceramic    
Fast Transient Response
Overcurrent Protection
Soft Start
Thermal Shutdown    
Overcurrent Protection
Soft Start
Thermal Shutdown    
Fast Transient Response
Overcurrent Protection
Soft Start
Thermal Shutdown    
Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125    
20VQFN     20VQFN
2.10 | 1ku     2.70 | 1ku     2.10 | 1ku    
    Min   Max   Range  
  Vin V    3.00 – 35.00V  
  Vout V    1.40 – 20.50V  
  Iout A    ≤ 1A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
'U1 Cin Cout Cnr '
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Companion parts

Part # Name Product Family Comments
TPS7A3301   Vin -3V to -36V, -1A, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator   LINEAR REGULATOR (LDO) - SINGLE CHANNEL LDO    
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