LT3506EDHD#PBF

LT®3506 is a dual current mode PWM step-down DC/DC converter with internal 2A power switches. This converter is synchronized to a single oscillator and runs with opposite phases, reducing the 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. Current mode PWM architecture provides fast transient response with simple compensation components and cycle-by-cycle current limiting. Application includes disk drives, DSP power supplies, wall transformer regulation, distributed power regulation, DSL modems, cable modems.

• Anti-phase switching reduces ripple
• Independent shutdown/soft-start pins
• Independent power good indicators ease supply sequencing
• Uses small inductors and ceramic capacitors
• Typical undervoltage lockout is 3.4V (TA = 25°C, VIN = 5V, VBOOST = 8V)
• Typical quiescent current is 3.8mA (not switching, TA = 25°C, VIN = 5V)
• Typical reference line regulation is 0.005 %/V (VIN = 5V to 25V, TA = 25°C)
• Maximum duty cycle is 89% (typ, TA = 25°C, VIN = 5V, VBOOST = 8V)
• 16-lead plastic DFN package
• Operating temperature rating range from -40°C to 85°C

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