The SC1153 is a programmable synchronous DC/DC controller designed for use in single ended power supply applications where efficiency is of primary concern. It features low cost, full functionality, synchronous operation, and a 5-bit VID programmable output. It is ideal for implementing DC/DC converters needed to power advanced microprocessors.
The SC1153 is a programmable synchronous DC/DC controller designed for single-ended power supply applications where efficiency is critical. It features an integrated 5-bit VID DAC and operates at a fixed frequency of 200 kHz, making it suitable for powering advanced microprocessors like the Pentium III in VRM configurations.
The device includes internal level-shift circuitry, high-side drive, and preset shoot-through control to allow the use of inexpensive n-channel power switches. Key features include an accessible error amplifier, temperature-compensated voltage reference, current limit comparator, frequency shift over-current protection, and open-collector logic outputs for Power Good and Over Voltage Protection.
| Oscillator Frequency | 200 kHz (typical) |
|---|---|
| Supply Voltage Range | 4.2 V to 7 V |
| Operating Temperature Range | -40°C to +125°C |
| Output Voltage Range | 1.3 V to 3.5 V |
| Supply Current | 5 mA (typical) |
The device operates at a fixed oscillator frequency of 200 kHz.
The absolute maximum rating for VCC to GND is 7 volts.
The programmable output voltage range is from 1.287 volts to 3.535 volts.