Datasheet

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(1) The inductance affects the stability of the converter. For tips on optimizing the inductance value, especially
for input voltages less than 5 V, see the compensation section in the device-specific data sheet. To operate
this demo board at voltages below 4.5 V with the supplied 10 µH inductor and remain in a safe stability
region, use a 1.25 MHz switching frequency (if V
IN
> 5 V, a 600 kHz or 1.25 MHz switching frequency is
acceptable).
(2) When operating the LM2698 at 1.25 MHz switching frequency, it is recommended to increase the bypass
capacitance, C
BYP
, to 0.220 µF.
Figure 1. LM2698 Demo Board Schematic
2
AN-1202 LM2698 Demo Board SNVA040C–September 2001–Revised April 2013
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