SA24535C33YNQ

·         3.5V to 36V Input Voltage Range

·         3.5A Output Current Capability

·         Low R_DS(ON) for Internal Switches: 89mΩ Top, 43mΩ Bottom

·         Typical 1µA Shutdown Current

·         Typical 15.5µA Quiescent Current

·         ±1.5% Output Voltage Accuracy in PWM Mode Over -40˚C to 150˚C Temperature Range

·         2.1MHz Switching Frequency

·         PWM or PFM Operation Selectable in Light Load

·         Spread Spectrum Function

·         Hiccup Mode Output Short-Circuit Protection

·         Cycle-by-Cycle Peak Current Limit

·         Power Good Indicator

·         Thermal Shutdown

·         QFN3×3-15 Package with Wettable Flanks

·         Automotive AEC- Q100 Grade 1 Certified

The SA24535C33 is a high-efficiency synchronous step-down DC-DC regulator featuring internal power and synchronous rectifier switches. It operates with a fixed frequency and peak current control over a wide input voltage range of 3.5V to 36V, and can deliver up to 3.5A of continuous output current.

Under light load conditions, it can operate in either pulse width modulation (PWM) mode or pulse frequency modulation (PFM) mode. In PFM mode, the SA24535C33 offers excellent efficiency across a wide range of applications by providing internal 89mΩ power and 43mΩ synchronous rectifier switches, along with frequency reduction at light load conditions. The 1μA shutdown supply current allows the device to be used in battery-powered applications. A fixed internal frequency of 2.1MHz is available. The spread spectrum function can enhance system EMI performance and mitigate noise in critical frequency bands. Additionally, the internal soft-start feature limits inrush current during power-on.

The SA24535C33 ensures safe operation under all conditions by providing a power good indicator, input under-voltage lockout, cycle-by-cycle current limit protection, output short-circuit protection, and thermal shutdown.

The SA24535C33 is available in a QFN 3×3-15 package with wettable flanks.