TPS54120 Series

Low-Noise 1A Power Supply with Integrated DC-DC Converter and Low-Dropout Regulator

Catalog

Low-Noise 1A Power Supply with Integrated DC-DC Converter and Low-Dropout Regulator

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	w/Supervisor	Frequency - Switching [Max]	Frequency - Switching [Min]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	w/LED Driver	Topology	Voltage/Current - Output 2	Voltage/Current - Output 2 [Max]	Voltage/Current - Output 2 [Min]	Supplier Device Package [y]	Supplier Device Package	Supplier Device Package [x]	Mounting Type	w/Sequencer	Voltage/Current - Output 1	Voltage/Current - Output 1 [Min]	Voltage/Current - Output 1 [Max]
Texas Instruments TPS54120RGYT	17 V	2.2 V		1.2 MHz	200 kHz	24-VFQFN Exposed Pad	125 °C	-40 °C	2		Linear (LDO) (1) Step-Down (Buck) (1)	1 A	6 V	0.8 V	3.5	24-VQFN	5.5	Surface Mount		1 A	0.8 V	6 V

Catalog

Low-Noise 1A Power Supply with Integrated DC-DC Converter and Low-Dropout Regulator

Key Features

• Low-Noise Output: 17 µVRMSat 100 Hz to1 MHzWide Input Voltage Range: 4.5 V to 17 VHigh Efficiency: 72% at 1 A, 12V InputExcellent Load/Line Transient ResponseSynchronizable to External Clock: 200 kHz to 1.2 MHzSmall Package: 3.5 mm × 5.5 mm QFN-24Low-Noise Output: 17 µVRMSat 100 Hz to1 MHzWide Input Voltage Range: 4.5 V to 17 VHigh Efficiency: 72% at 1 A, 12V InputExcellent Load/Line Transient ResponseSynchronizable to External Clock: 200 kHz to 1.2 MHzSmall Package: 3.5 mm × 5.5 mm QFN-24

Description

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. 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.