TPS7A3501 Low Noise, High PSRR 1A Active Filter | TI.com

TPS7A3501 (ACTIVE)

Low Noise, High PSRR 1A Active Filter

 

Description

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.

Features

  • 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

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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 @ 100 KHz (dB)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package size: mm2:W x L (PKG)
TPS7A3501
Adjustable Output    
1    
5    
1.7    
4.5    
1.2    
WSON | 6    
Enable
Foldback Overcurrent Protection    
1    
-40 to 125    
67    
3.8    
0.75 | 1ku    
Catalog    
Ceramic    
40    
330    
2.2    
See datasheet (WSON)    

Design tool

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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


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