Vin -3V to -36V, -1A, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator - TPS7A33


Vin -3V to -36V, -1A, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator



The TPS7A33 series of linear regulators are negative voltage (–36 V), ultralow-noise (16-µVRMS, 72-dB PSRR) linear regulators capable of sourcing a maximum load of 1 A.

The TPS7A33 series include a complementary metal oxide semiconductor (CMOS) logic-level-compatible enable pin (EN) to allow for user-customizable power management schemes. Other features available include built-in current limit and thermal shutdown features to protect the device and system during fault conditions.

The TPS7A33 family is designed using bipolar technology primarily for high-accuracy, high-precision instrumentation applications, where clean voltage rails are critical to maximize system performance. This feature makes it ideal to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A33 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 ensured in sensitive instrumentation, medical, test and measurement, audio, and RF applications.

For applications where positive and negative high-performance rails are required, consider the TPS7A4700 positive high-voltage, ultralow-noise, low-dropout linear regulator as well.


  • Input Voltage Range: –3 V to –36 V
  • Noise:
    • 16 µVRMS (10 Hz to 100 kHz)
  • Power-Supply Ripple Rejection:
    • 72 dB (10 kHz)
  • Adjustable Output: –1.18 V to –33 V
  • Maximum Output Current: 1 A
  • Stable With Ceramic Capacitors ≥ 10 µF
  • Built-In Current-Limit and Thermal Shutdown
  • Available in an External Heatsink-Capable, High
    Thermal Performance TO-220 Package
  • 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)
1    0.2    1    0.15   
Adjustable Output
Negative Output   
Adjustable Output
Negative Output   
Adjustable Output    Adjustable Output   
-36    -36    3    3   
-3    -3    36    36   
-33    -33    1.4    1.2   
-1.2    -1.2    34    33   
0.21    0.05    0.58    0.06   
290    216    307    260   
2.5    2.5    2.5    2.5   
16    15    4    15   
64    55    60    54   
Ceramic    Ceramic    Ceramic    Ceramic   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
20VQFN    8MSOP-PowerPAD

WEBENCH® Designer TPS7A33

  Min   Max Range
Vin  V -36.0 to -3.0V
Product Option
Vout  V
Iout  A ≤ 1.0A
Ambient Temp  °C -40.0 to 125.0°C