The Panasonic Corporation has successfully developed a new high-speed response hysteretic control DC-DC converter LSI series. The DC-DC converters are designed to operate at high-frequencies leading to faster load transient responses, easily meeting the requirements for the highly integrated and low voltage operations of the memory and the CPU. The DC-DC converters have the following features:
- Fast load transient response with suppressed output voltage fluctuations.
· Undershoot: 20mV 51% reduction
· Overshoot: 20mV 44% reduction
This allows stable operation of the product and a large input voltage range margin. - Stable operation even when the input voltage drops to as low as the output-voltage. This enables the maximum effective usage of the battery.
- Mount area reduction by the use of smaller package, smaller value constants and reduced total number of external components provide compact system solutions.
· Mount area: about 33% reduction.
Implementation of finer processes and lower voltage design of the memory and the CPU have led to the necessity of designing DC-DC converters with fast load transient response. Existing voltage-mode control and current-mode DC-DC converters have difficulties corresponding to fast load transient response.
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