No-load quiescent current draw on ADP5301 is too high

dburkhard on Oct 3, 2017

My evaluation board is configured for PWM (Sync/Mode pin is at Vin). The output is set to 3.0 volts and the input is 5.0 volts. With no load, the current draw is 5.75 mA. If I configure the regulator for hysteretic mode, the current draw is per the datasheet, 170 nA with occasional switching. The datasheet specifies the PWM quiescent current at 425 uA. Could I get clarification on PWM no-load current draw?

Thanks,

Daryl B.

0 Kevin.Yao

on Oct 4, 2017 1:52 PM over 3 years ago
425uA Iq is under none switching condition. you set PWM mode but ADP5300 is still switching with 2MHz frequency so that the input current is milliamper level without load.

BG,

Kevin
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0 EZAdministrator

on Aug 2, 2018 3:57 PM over 2 years ago
This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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EZ Admin
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