TPS7A49 Vin 3V to 36V, 150mA, Ultra-Low-Noise, High-PSRR Low-Dropout (LDO) Linear Regulator |


Vin 3V to 36V, 150mA, Ultra-Low-Noise, High-PSRR Low-Dropout (LDO) Linear Regulator

Vin 3V to 36V, 150mA, Ultra-Low-Noise, High-PSRR Low-Dropout (LDO) Linear Regulator - TPS7A49

Recommended alternative parts

  • TPS7A88  -  TPS7A88 is a dual-channel, low noise, 1-A LDO
  • TPS7A91  -  TPS7A91 is a single-channel, low-noise, 1-A LDO


The TPS7A49 series of devices are positive, high-voltage (36 V), ultralow-noise (15.4 µVRMS, 72-dB PSRR) linear regulators that can source a 150-mA load.

These linear regulators include a CMOS logic-level-compatible enable pin and capacitor-programmable soft-start function that allows for customized power-management schemes. Other available features include built-in current limit and thermal shutdown protection to safeguard the device and system during fault conditions.

The TPS7A49 family is designed using bipolar technology, and is ideal for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This design makes the device an excellent choice to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A49 family of linear regulators is suitable for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversion, maximum system performance is provided in sensitive instrumentation, test and measurement, audio, and RF applications.

For applications where positive and negative high-performance rails are required, consider TI’s TPS7A30xx family of negative high-voltage, ultralow-noise linear regulators as well.


  • Input Voltage Range: 3 V to 36 V
  • Noise:
    • 12.7 µVRMS (20 Hz to 20 kHz)
    • 15.4 µVRMS (10 Hz to 100 kHz)
  • Power-Supply Ripple Rejection:
    • 72 dB (120 Hz)
    • ≥ 52 dB (10 Hz to 400 kHz)
  • Adjustable Output: 1.194 V to 33 V
  • Output Current: 150 mA
  • Dropout Voltage: 260 mV at 100 mA
  • Stable with Ceramic Capacitors ≥ 2.2 µF
  • CMOS Logic-Level-Compatible Enable Pin
  • Fixed Current-Limit and Thermal Shutdown Protection
  • Packages: 8-Pin HVSSOP PowerPAD™ and
    3-mm × 3-mm VSON
  • 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
Operating Temperature Range (C)
0.15     0.2     1     1    
Adjustable Output     Adjustable Output
Negative Output    
Adjustable Output
Negative Output    
Adjustable Output
Programmable Output    
3     -36     -36     3    
36     -3     -3     36    
1.2     -33     -33     1.4    
33     -1.2     -1.2     34    
0.06     0.05     0.21     0.58    
260     216     290     307    
2.5     2.5     2.5     2.5    
15     15     16     4    
54     55     64     60    
Ceramic     Ceramic     Ceramic     Ceramic    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
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WEBENCH® Designer TPS7A49

  Min   Max Range
Vin  V 3.0 to 36.0V
Product Option
Vout  V
Iout  A ≤ 0.15A
Ambient Temp  °C -40.0 to 125.0°C