TPS54120
Low-Noise 1A Power Supply with Integrated DC-DC Converter and Low-Dropout Regulator
TPS54120
- Low-Noise Output: 17 µVRMS at 100 Hz to
1 MHz - Wide Input Voltage Range: 4.5 V to 17 V
- High Efficiency: 72% at 1 A, 12V Input
- Excellent Load/Line Transient Response
- Synchronizable to External Clock: 200 kHz to 1.2 MHz
- Small Package: 3.5 mm × 5.5 mm QFN-24
The TPS54120 combines the high-efficiency of a step-down switching (dc-dc) converter with a high power-supply rejection (PSR), low-noise, low-dropout regulator (LDO) to provide an ultra low-noise power supply that delivers quiet power rails to noise-sensitive applications.
With a wide input range of 4.5 V to 17 V, the TPS54120 is ideally suited for systems with 12-V power busses, and supports a 1-A continuous output current. The output voltage can be set from 0.8 V to 6.0 V using external resistors. The dc-dc converter and LDO are completely configurable, allowing the TPS54120 to be used in a wide range of low-noise applications. In addition, the TPS54120 includes features such as softstart, switching frequency synchronization, and a power-good signal.
The device is available in a space-saving, 3.5-mm × 5.5-mm QFN package, and is specified to operate over a –40°C to +125°C junction temperature range.
Technical documentation
Design & development
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TPS54120EVM-103 — Evaluation Module for TPS54120 1A Power Supply w/ Integrated DC-DC Converter & Low-Dropout Regulator
Package | Pins | Download |
---|---|---|
VQFN (RGY) | 24 | View options |
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