XC9248
Series
■NOTE ON USE
1. For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings be
exceeded.
2. The DC/DC converter characteristics depend greatly on the externally connected components as well as on the
characteristics of this IC, so refer to the specifications and typical standard circuit examples of each component when
carefully considering which components to select. Be especially careful of the capacitor characteristics and use B
characteristics (JIS standard) or X7R, X5R (EIA standard) ceramic capacitors.
3. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current.
Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible.
4. This IC monitors Peak to Peak current in the coil by means of a Low side driver current limiting circuit and a High side driver
current limiting circuit. The Peak to Peak current varies depending on the difference between the input voltage and the
output voltage as well as the L value of the coil and thus, in some cases, current limiting may activate too frequently and
cause operation to become unstable or the current may not reach the maximum output current.
5. With the A type, when a sharp load fluctuation occurs, the VOUT voltage drop is conveyed directly to the FB pin through CFB,
and short-circuit protection may activate at a voltage higher than 1/2 the VOUT voltage.
6. The VL pin is the output of the internal regulator for operation of the DC/DC control block. For stable operation, always
connect an external capacitor CVL to the VL pin. Do not use the VL pin for external power supply, as it has been optimized as a
local power supply.
7. With this IC, operation may become unstable at the minimum operating voltage or less.
8. Make sure that the absolute maximum ratings of the external components and of this IC are not exceeded.
9. Torex places an importance on improving our products and their reliability.
We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in their
systems.
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TOREX [ Torex Semiconductor ]
