LT1777CS#PBF

LT1777 is a buck (step-down) regulator designed for noise sensitive applications. It contains a dI/dt limiting circuit programmed via a small external inductor in the switching path. Internal circuitry also generates controlled dV/dt ramp rates. The monolithic die includes all oscillator, control and protection circuitry. The part can accept operating input voltages as high as 48V, and contains an output switch rated at 700mA peak current. Current mode control offers excellent dynamic input supply rejection and short-circuit protection. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply. It is widely used in application such as automotive cellular and GPS receivers, telecom power supplies, industrial instrument power supplies etc.

• Internally limited dV/dt
• True current mode control
• Switching frequency is 100KHz typical
• Synchronization range is 250KHz maximum
• Low supply current in shutdown is 30µA typical
• Voltage gain is 600V/V typical
• VCC supply current is 2.5mA typical
• Maximum switch duty cycle is 90% typical
• Operating junction temperature is 0°C to 125°C
• Package style is 16-lead NSOIC

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party