Vin (Min) (V)5.5Vin (Max) (V)28Vout (Min) (V)2Vout (Max) (V)5.5Iout (Max) (A)20Iq (Typ) (mA)0.55Switching frequency (Min) (kHz)200Switching frequency (Max) (kHz)460FeaturesEnable, Light Load Efficiency, Power Good, Synchronous RectificationOperating temperature range (C)-40 to 85Regulated outputs (#)2Number of Phases1RatingCatalogopen-in-newFind other Buck controllers (external switch)
The TPS51123 is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The TPS51123 supports high efficiency, fast transient responses and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51123 is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.