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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.
Out-of-Audio, D-CAP are trademarks of Texas Instruments
TPS51120 | TPS51123 | TPS51124 | TPS51125A | TPS51220 | TPS51220A | |
Topology | Buck,D-CAP™ Mode | Buck,D-CAP™ Mode | Buck,D-CAP™ Mode | Buck,D-CAP™ Mode | Buck,D-CAP™ Mode | Buck,D-CAP™ Mode |
Vin(Min)(V) | 4.5 | 5.5 | 3 | 5.5 | 4.5 | 4.5 |
Vin(Max)(V) | 28 | 28 | 28 | 28 | 28 | 32 |
Vout(Min)(V) | 1.05 | 2.0 | 0.76 | 2 | 1 | 1 |
Vout(Max)(V) | 5.5 | 5.5 | 5.5 | 5.5 | 12 | 12 |
Regulated Outputs(#) | 2 | 2 | 2 | 2 | 2 | 2 |
Iout(Max)(A) | 20 | 20 | 15 | 20 | 20 | 20 |
Switching Frequency(Max)(kHz) | 580 | 460 | 420 | 460 | 1000 | 1000 |
Iq(Typ)(mA) | 0.75 | 0.55 | 0.35 | 0.55 | 1.3 | 1.3 |
Pin/Package | 32QFN | 24VQFN | 24VQFN | 24VQFN | 32QFN | 32QFN |
Thermal Shutdown | Yes | Yes | Yes | Yes | Yes | Yes |
Vout2(Min)(V) | 1.05 | 2.0 | 0.76 | 2 | 1 | 1 |
Vout2(Max)(V) | 5.5 | 5.5 | 5.5 | 5.5 | 12 | 12 |
Iout2(A) | 20 | 20 | 20 | 20 | 20 | 20 |
Rating | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
Duty Cycle(Max)(%) | 88 | 93 | 88 | 93 | 99 | 99 |
TPS51123RGER,TPS51123RGE,TPS51123,51123
TI