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

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

Parametrics

Compare all products in Linear regulators (LDO) Email Download to Excel
Part number Order 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 PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7A47 Order now Adjustable Output
Programmable Output    
1     36     3     34     1.4     VQFN | 20     Enable
Soft Start    
1     -40 to 125     33     4     2.10 | 1ku     Catalog     60     2.5     307     0.58     20VQFN: 25 mm2: 5 x 5 (VQFN | 20)    
TPS7A30 Order now Adjustable Output
Negative Output    
0.2     -3     -36     -1.2     -33     MSOP-PowerPAD | 8
SON | 8    
Enable
Soft Start    
1     -40 to 125     48     15     1.50 | 1ku     Catalog     55     2.5     216     0.05     8MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 8)
See datasheet (SON)    
TPS7A33 Order now Adjustable Output
Negative Output    
1     -3     -36     -1.2     -33     VQFN | 20     Enable
Soft Start    
1     -40 to 125     31     16     2.70 | 1ku     Catalog     64     2.5     290     0.21     20VQFN: 25 mm2: 5 x 5 (VQFN | 20)    
TPS7A49 Order now Adjustable Output     0.15     36     3     33     1.2     MSOP-PowerPAD | 8
SON | 8    
Enable
Soft Start    
1     -40 to 125     48     15     1.10 | 1ku     Catalog     54     2.5     260     0.06     8MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 8)
See datasheet (SON)