SC1154 is a programmable synchronous DC/DC switch-mode controller from Semtech. It features high efficiency and low external components. It is ideal for single-ended power supply applications.
The SC1154 is a synchronous-buck switch-mode controller designed for single-ended power supply applications where efficiency is the primary concern. It is a hysteretic type controller with a user-selectable hysteresis, making it ideal for powering advanced microprocessors such as Pentium II in single and multiple processor configurations. Key features include an integrated 5-bit D/A converter, temperature-compensated voltage reference, current limit comparator, over-current protection, and an adaptive deadtime circuit to prevent shoot-through of the power MOSFET. The device also provides power good signaling, logic-compatible shutdown, and over-voltage protection.
| Supply Voltage Range | 11.4V to 13V |
|---|---|
| Operating Junction Temperature | 0 to +125 °C |
| Continuous Power Dissipation (Tj=25°C) | 6.25 W |
| Output Voltage Range | 1.3V to 3.5V |
| Peak Output Current | 2 A |
| Efficiency | Up to 95% |
The maximum operating junction temperature is +125 °C.
The high and low side drivers have a peak current rating of 2 amps.
The typical propagation delay time is 250 ns.