8

4. RON

* Vlx=3V, R=30Ω

* Ron=

R • Von Ω

Vlx-Von

5. Ilxl

6. Vceh, Vcel, Iceh, Icel

Remarks) CE pin : ELM92xx2x series

■External parts

1) Coil

To design DC/DC converters using ELM92 series, coil, diode, and capacitor are necessary.

(Refer to the standard circuit configuration.)

When choosing choke coil, please select that whose core is not magnetically saturated, DC resistance is

low, and which has sufficient margin for rated current.

ELM recommends to use inductance around 2.2μH. It is possible that output voltage ripple form may reach

over 10mV when using high industance. If ripple can be ingored, it is possible to acquire high efficiency

with high industance.

The examples using 4.7μH are shown as follows.

15 -