Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16µA Quiescent Current

The LT8652S is a dual step-down regulator that delivers up to 8.5A of continuous current from both channels and supports loads up to 12A from each channel. The LT8652S uses second generation Silent Switcher technology including integrated bypass capacitors to deliver a high frequency, high efficiency, small solution with excellent EMI performance. The LT8652S is ideal for noise sensitive applications such as PLLs and high bandwidth data and communications systems.

The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, enabling a wide control loop bandwidth for fast transient response. Output current monitoring and limiting allows inductors to be selected for the maximum output current in a given application. Differential output voltage sensing provides accurate voltage regulation at the point of load for high current applications. The two channels can be combined to deliver 17A, and two LT8652S ICs can be combined for a 4-phase, 34A supply.

Applications

* Server Power Applications

* General Purpose Step-Down

* Silent Switcher®2 Architecture:

* Ultralow EMI on Any PCB

* Eliminates PCB Layout Sensitivity

* Internal Bypass Capacitors Reduce Radiated EMI

* Spread Spectrum Frequency Modulation

* 8.5A DC from Each Channel Simultaneously

* Up to 12A on Either Channel

* Ultralow Quiescent Current Burst Mode® Operation:

* 16µA IQ Regulating 12VIN to 3.3VOUT (Both Channels)

* Output Ripple <10mVP-P

* ±1.2% 600mV Feedback Voltage with Remote Sense