SSP9459

The SSP9459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.5A peak-output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides a fast transient response and eases loop stabilization. The wide input range(4.5V to 60V) provides high efficiency output of 0.5A current, Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown. The SSP9459 is a 480KHz, step-down switching regulator with integrated internal high side MOSFET. The output of the circuit's internal amplifier is proportional to the peak inductance current, and the feedback signal is compared with the internal 0.812V reference voltage to stabilize the output voltage. It has a wide input voltage range, precise current limits, low operational quiescent current feature is suit for battery powered applications.

Applications

• High voltage power conversion
• Industrial power system
• Distributed power system
• Battery powered system

Key features

• Output 0.5A peak current
• 4.5V to 60V operating input range
• 1Ω internal power MOSFET
• 480KHz fixed switching frequency
• Stable with Low-ESR Ceramic Output Capacitors
• Cycle-by-Cycle Over-Current Protection
• Thermal shutdown protection
• >90% efficiency
• Output voltage: adjustable from +0.81V to 0.95Vin
• Low shutdown mode current: <1μA
• SOT23-6 package