DESCRIPTION

The LTC®3124 is a dual-phase, synchronous step-up DC/DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, minimizing induc tor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV.

FEATURES

VIN Range: 1.8V to 5.5V, 500mV After Start-Up
Adjustable Output Voltage: 2.5V to 15V
1.5A Output Current for VIN= 5V and VOUT= 12V
Dual-Phase Control Reduces Output Voltage Ripple
Output Disconnects from Input When Shut Down
Synchronous Rectification: Up to 95% Efficiency
Inrush Current Limit
Up to 3MHz Programmable Switching Frequency Synchronizable to External Clock
Selectable Burst Mode® Operation: 25µA IQ
Output Overvoltage Protection
Internal Soft-Start
<1µA IQ in Shutdown
16-Lead, Thermally- Enhanced 3mm ×5mm × 0.75mm DFN and TSSOP Packages

APPLICATIONS

RF, Microwave Power Amplifiers
Piezo Actuators
Small DC Motors, Thermal Printers
12V Analog Rail from Battery, 5V, or Backup Capacitor