The SC1158 is a low-cost, full featured, synchronous voltage-mode controller designed for use in single-ended power supply applications where efficiency is of primary concern. Synchronous operation allows for the elimination of heat sinks in many applications. The SC1158 is ideal for implementing DC/DC converters needed to power advanced microprocessors such as Pentium II and K6-2. It features an integrated 4-bit VID DAC, temperature-compensated voltage reference, triangle wave oscillator, current limit comparator, frequency shift over-current protection, and an internally compensated error amplifier. The SC1158 operates at a fixed 140KHz, providing an optimum compromise between efficiency, external component size, and cost.
The Semtech $C1158 is a full-featured, synchronous DC/DC controller designed for single-ended power supply applications where efficiency is critical. It operates at a fixed frequency of 140 kHz to optimize the trade-off between efficiency, external component size, and cost. The device includes internal level-shift and high-side drive circuitry, allowing the use of inexpensive N-channel power switches.
| Oscillator Frequency | 140 kHz |
|---|---|
| Supply Voltage (Voc) | 4.5 V to 7 V |
| Storage Temperature Range | -65°C to +150°C |
| Package Type | SO-16NB |
The device operates at a fixed oscillator frequency of 140 kHz.
The absolute maximum rating for the supply voltage (Voc) to ground is 7 V.
The device operates within a temperature range of 0 to 70 °C.