Electronic Design

Step-Down Controller Exhibits Fast Transient Response

The LTC3838 high-frequency controlled, on-time dual-output synchronous step-down dc/dc controller with differential output voltage sensing and clock synchronization enables a very fast transient response by increasing its operating frequency during a transient event. Operating frequency is selectable from 200 kHz to 2 MHz or can be synchronized to an external clock. A 30-ns minimum on-time allows for a high step-down ratio power supply at very high operating frequencies. The device operates over a 4.5V to 38V input voltage range and delivers output voltages ranging from 0.6V to 5.5V. Price is The $3.18 each/1,000. LINEAR TECHNOLOGY CORP., Milpitas, CA. (800) 454-6327.

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