TPS7A47 36-V, 1-A, 4.17-μVRMS, RF low-dropout (LDO) voltage regulator | TI.com

TPS7A47 (ACTIVE)

36-V, 1-A, 4.17-μVRMS, RF low-dropout (LDO) voltage regulator

 

Recommended alternative parts

  • TPS7A91  -  A single-channel, low-noise, 1-A LDO
  • TPS7A88  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   A dual-channel, low noise, 1-A LDO.

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 Linear regulators (LDO)

 
Output Options
Iout (Max) (A)
Vin (Max) (V)
Vin (Min) (V)
Vout (Max) (V)
Vout (Min) (V)
Package Group
Features
Regulated Outputs (#)
Operating Temperature Range (C)
Thermal Resistance θJA (°C/W)
Noise (uVrms)
Approx. price (US$)
Rating
Output Capacitor Type
PSRR @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
TPS7A47 TPS7A30 TPS7A33 TPS7A49
Adjustable Output
Programmable Output    
Adjustable Output
Negative Output    
Adjustable Output
Negative Output    
Adjustable Output    
1     0.2     1     0.15    
36     -3     -3     36    
3     -36     -36     3    
34     -1.2     -1.2     33    
1.4     -33     -33     1.2    
VQFN | 20     MSOP-PowerPAD | 8
SON | 8    
VQFN | 20     MSOP-PowerPAD | 8
SON | 8    
Enable
Soft Start    
Enable
Soft Start    
Enable
Soft Start    
Enable
Soft Start    
1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
33     48     31     48    
4     15     16     15    
2.10 | 1ku     1.50 | 1ku     2.70 | 1ku     1.10 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic     Ceramic    
60     55     64     54    
2.5     2.5     2.5     2.5    
307     216     290     260    
0.58     0.05     0.21     0.06    
20VQFN: 25 mm2: 5 x 5 (VQFN | 20)     8MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 8)
See datasheet (SON)    
20VQFN: 25 mm2: 5 x 5 (VQFN | 20)     8MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 8)
See datasheet (SON)    

Design tool

WEBENCH® Designer TPS7A47

  Min   Max Range
Vin  V 3.0 to 35.0V
Product Option
Vout  V
Iout  A ≤ 1.0A
Ambient Temp  °C -40.0 to 125.0°C