Analog Devices LTC3126

Description

The LTC®3126 is a high efficiency synchronous buckconverter with an internal no-loss PowerPath™ supportingseamless operation from two separate input power sources.Pin-selectable ideal diode-OR and priority input modeswith user programmable undervoltage lockout thresholdsprovide full control over the transition between the inputpower sources. The fast, automatic switchover providedby the internal PowerPath eliminates the need for hold-upcapacitors and minimizes disturbances on the output rail.An active input channel indicator and independent inputand output power good signals provide complete feedbackof the power system status.

Features

Seamless, Automatic Transition Between Two InputPower SourcesWide Input Voltage Range: 2.4V to 42VWide Output Voltage Range: 0.818V to VINUp to 2.5A Continuous Output CurrentPin-Selectable Priority and Ideal Diode-OR ModesBurst Mode® Operation, IQ = 2μA95% Efficiency at 1A, VIN = 12V, VOUT = 5V1μA Current in ShutdownProgrammable Input UVLO ThresholdsInput Valid, Priority Channel and PGOOD Indicators200kHz to 2.2MHz Fixed Frequency PWMSynchronizable to an External ClockCurrent Mode Control with 60ns Minimum On-TimeMinimal External ComponentsThermally Enhanced 28-Lead 4mm × 5mm QFN and28-Lead TSSOP Packages

Typical applications

• Portable Industrial/Communications Test Equipment
• Uninterruptible Power Supplies
• Automotive Power with Battery Backup
• Battery and Supercapacitor Backup Power

More information

• Datasheet
• IC product information