SA24493 Datasheet | Silergy

SA24491/SA24492/SA24493/SA24493E/SA24493L High Efficiency, 36V Input, 1/2/3A Synchronous Step Down Regulators General Description The SA2449x is a high-efficiency synchronous step-down DC-DC converter capable of delivering a load current of 1A/2A/3A. It operates over a wide input voltage range of 4.5V to 36V and integrates main and synchronous MOSFET switches with very low RDS(ON) to minimize conduction loss. The SA2449x uses a peak current control architecture. The switching frequency is adjustable from 300k Hz to 2.2MHz using an external resistor. The SA24491/SA24492/ SA24493/SA24493L Features ultra-low quiescent current to achieve high efficiency under light load conditions. The SA24493E works at Force Continuous Conduction Mode (FCCM) under light load for small output voltage ripple. Additionally, the internal soft-start function limits inrush current during power-up. The SA2449x is available in a QFN2×2-12 Package. Part Number SA24491TLQ SA24492TLQ SA24493TLQ SA24493ETLQ SA24493LTLQ Output Current 1A 2A 3A 3A 3A Light Load Mode PFM PFM PFM FCCM PFM Output Discharge Function Y Y Y Y N Key Features - Low RDS(ON) for Internal Switches (Top/Bottom): 130/75mΩ - 4.5-36V Input Voltage Range - Low quiescent current: IQ = 18 µA (Typ.) - Internal pensation - Internal 1ms Soft-start Limits the Inrush Current - Adjustable Switching Frequency Range: 300k Hz to 2.2MHz - Light Load Operating Mode - SA24491/SA24492/SA24493/SA24493L: PFM - SA24493E: FCCM - Output Current Capability - SA24491: 1A - SA24492: 2A - SA24493/SA24493E/SA24493L: 3A - ±1% 0.6V Reference Over -40°C~125°C - Cycle-by-cycle Peak Current...