R1234D

11

When you use these ICs, consider the following issues;

• When you control the CE pin and MODE pin by another power supply, do not make its "H" level more than

characteristics such as tantalum capacitors.

• At VFM mode, (MODE="H"), Latch protection circuit does not operate.

• If the mode is switched over into PWM mode from VFM mode during the operation, change the mode at

light load current. If the load current us large, output voltage may decline.

switching current, and the operation might be unstable.

The performance of power source circuits using these ICs extremely depends upon the peripheral circuits.

Pay attention in the selection of the peripheral circuits. In particular, design the peripheral circuits in a way that

the values such as voltage, current, and power of each component, PCB patterns and the IC do not exceed their

respected rated values.