LT8610EMSE#TRPBF

A compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8610 reducing the input supply current to 1µA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. Available in a small 16-lead MSOP package with exposed pad for low thermal resistance.

Applications

• Automotive and Industrial Supplies
• General Purpose Step-Down
• GSM Power Supplies

Key features

• Wide Input Voltage Range: 3.4V to 42V
• Ultralow Quiescent Current Burst Mode Operation: 2.5µA I0 Regulating 12VIN to 3.3V OUT Output Ripple < 10mVP-P
• High Efficiency Synchronous Operation: 96% Efficiency at 1A, 5VOUT from 12VIN 94% Efficiency at 1A, 3.3VOUT from 12VIN
• Fast Minimum Switch-On Time: 50ns
• Low Dropout Under All Conditions: 200mV at 1A
• Allows Use Of Small Inductors
• Low EMI
• Adjustable and Synchronizable: 200kHz to 2.2MHz
• Current Mode Operation
• Accurate 1V Enable Pin Threshold
• Internal Compensation
• Output Soft-Start and Tracking
• Small Thermally Enhanced 16-Lead MSOP Package