1 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 µV_RMS (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

2 Applications

• Post DC-DC Converter Ripple Filtering
• Base Stations and Telecom Infrastructure
• Professional Audio
• Communications
• Imaging
• Test and Measurement
• Passive Filter Replacement

3 Description

The TPS7A3501 is a positive voltage, low-noise
(3.8-µV_RMS) 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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit