The TPS54122 device combines an efficient 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 a QuietSupply rail to noise-sensitive applications.
TPS54122 is ideally suited for systems with 5-V power busses and can support 3-A continuous output current through the DC-DC or LDO output. The LDO output voltage can be set from 0.8 V to 3.6 V, and the DC-DC can be adjusted from 0.83 V to 5 V using external resistors. The device can be used in a wide range of low-noise applications because the dc-dc converter and LDO are completely configurable. In addition, the TPS54122 includes features such as soft start, switching frequency synchronization, and a power-good signal.
By feeding the output of the DC-DC converter to the input of the LDO, the TPS54122 can supply efficient, low-noise power at up to 3 A.
The TPS54122 is available in a space-saving,
5.50 mm × 3.50 mm VQFN package, and is specified to operate over a –40°C to +125°C ambient temperature range.
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|Part number||オーダー・オプション||Vin (Min) (V)||Vin (Max) (V)||Vout (Min) (V)||Vout (Max) (V)||Iout (Max) (A)||Regulated outputs (#)||Switching frequency (Min) (kHz)||Switching frequency (Max) (kHz)||Iq (Typ) (mA)||Features||Control mode||Duty cycle (Max) (%)||Operating temperature range (C)||Rating||Package Group||Type||Package size: mm2:W x L (PKG)|
|Current Mode||98||-40 to 150||Catalog||VQFN | 24||Converter||24VQFN: 19 mm2: 3.5 x 5.5 (VQFN | 24)|
|Current Mode||98||-40 to 125||Catalog||VQFN | 24||Converter||24VQFN: 19 mm2: 3.5 x 5.5 (VQFN | 24)|