The LT1940EFE#PBF is a Dual Monolithic 1.1MHz Step-down Switching Regulator with internal 2A power switches. Both converters are synchronized to a single 1.1MHz oscillator and run with opposite phases, reducing input ripple current. The output voltages are set with external resistor dividers and each regulator has independent shutdown and soft-start circuits. Each regulator generates a power-good signal when its output is in regulation, easing power supply sequencing and interfacing with microcontrollers and DSPs. The LT1940's 1.1MHz switching frequency allows the use of tiny inductors and capacitors, resulting in a very small dual 1.4A output solution. Constant frequency and ceramic capacitors combine to produce low, predictable output ripple voltage. A current mode PWM architecture provides fast transient response with simple compensation components and cycle-by-cycle current limiting. Frequency fold back and thermal shutdown provide additional protection.
- Two 1.4A output switching regulators with internal power switches
- Constant 1.1MHz switching frequency
- Anti-phase switching reduces ripple
- Independent shutdown/soft-start pins
- Independent power good indicators ease supply sequencing
- Uses small inductors and ceramic capacitors
计算机和计算机周边, 电源管理
(EN)
