Texas Instruments TPS7A3501DRVT

• 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

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.