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TPS54120

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

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TPS54120

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Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 17 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 6 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 17 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 6 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
VQFN (RGY) 24 19.25 mm² 5.5 x 3.5
  • 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
  • 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.

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.
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* Data sheet Low-Noise, 1-A Power Supply with Integrated DC-DC Converter and LDO Regulator datasheet (Rev. C) 22 Jun 2012

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