TPS7A3501 1-A, low-noise, adjustable low-dropout voltage regulator with enable |

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1-A, low-noise, adjustable low-dropout voltage regulator with enable



The TPS7A3501 is a positive voltage, low-noise
(3.8-µVRMS) power filter capable of sourcing a 1-A load suitable for quiet supply solutions. Power filters, such as the TPS7A3501, provide voltage regulation across the input and output terminals with high efficiency (low insertion loss), and power-supply rejection. The device is ideally suited as a noise filter for 3.3-V, 2.5-V, and 1.8-V supplies at up to 1 A.

The input-to-output voltage regulation is also user-programmable, from 200 mV to 500 mV, with a single external resistor. If no resistor is used, the TPS7A3501 provides 330 mV of input-to-output voltage regulation. The device is stable with 10-µF input and output ceramic capacitors and a 10-nF noise-reduction ceramic capacitor.

The TPS7A3501 is fully specified over a wide temperature of –40°C to 125°C. The device is offered in a low thermal resistance, 2-mm × 2-mm, WSON-6 package. Unlike passive filters, the TPS7A3501 provides thermal and current protection for itself and surrounding circuitry.


  • Regulates Input-to-Output Voltage:
    • User-Programmable Input-to-Output Voltage
      Regulation Range:
      200 mV to 500 mV
  • Power-Supply Rejection Ratio:
    • 42 dB at 1 MHz
    • ≥ 32 dB (360 kHz to 3.9 MHz)
  • Low-Noise Output:
    • 3.8 µVRMS (10 Hz to 100 kHz)
  • Output Current: Up to 1 A
  • Output Voltage Range: 1.21 V to 4.5 V
  • Excellent Load Transient Response
  • Stable With Ceramic Capacitors as Low as
    10 µF
  • Current Limit and Thermal Shutdown for
    Fault Protection
  • Available in a Low Thermal Resistance Package:
    2-mm × 2-mm WSON-6
  • Operating Temperature Range:
    –40°C to 125°C

WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS7A3501

  Min   Max Range
Vin  V 1.71 to 5.0V
Vout  V 1.21 to 4.5V
Iout  A ≤ 1A
Ambient Temp  °C -40 to 125°C


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) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7A3501 Order now Adjustable output     1     5     1.7     4.5     1.2     WSON | 6     Enable
Foldback Overcurrent Protection    
1     -40 to 125     67     3.8     0.66 | 1ku     Catalog     40     330     2.2     6WSON: 4 mm2: 2 x 2 (WSON | 6)