LT3957EUHE#PBF

LT3957 is a wide input range, current mode DC/DC converter which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. It features an internal low side N-channel power MOSFET rated for 40V at 5A and driven from an internal regulated 5.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of device can be set with an external resistor over a 100KHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A minimum operating supply voltage of 3V, and a low shutdown quiescent current of less than 1μA, make the device ideally suited for battery-powered systems. It is used in applications such as automotive, telecom, industrial.

• Wide input voltage range from 3V to 40V
• Internal 5A/40V power switch
• Current mode control provides excellent transient response
• Synchronizable to an external clock, programmable soft-start
• Internal 5.2V low dropout voltage regulator
• Programmable input undervoltage lockout with hysteresis
• Switching frequency is 100KHz typical at (RT = 140K to SGND, FBX = 1.6V, VC = 1.5V)
• Shutdown current is 1μA typical at (EN/UVLO = 0V, TA ≈ TJ = 25°C, VIN = 24)
• Operating temperature range from -40°C to 125°C
• Package style is 36-lead plastic QFN

注释

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