LMZ31520 Reference Design Circuit | Power Module Application Circuit

The LMZ31520SIMPLESWITCHER® power module is an easy-to-use integrated power solution that combines a 20A DC/DC converter, power MOSFET, a shielded inductor and passive components into a thin QFN package. This article mainly introduces the LMZ31520 features, application range, reference design circuit and circuit analysis to help you shorten the design time.

LMZ31520 features: ultra-fast load step response; efficiency up to 96%; optional slow start; power normal output

Typical applications for the LMZ31520: broadband and communications infrastructure; digital signal processor (DSP) and field programmable gate array (FPGA) point-of-load applications; high-density power systems

LMZ31520 reference design application circuit:

Figure 1 Internal structure of LMX31520

TheLMZ31520 SIMPLE SWITCHER® power module is an easy-to-use integrated power solution that combines a 20-A DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low profile, QFN package.

Figure 2LMZ31520 reference design

The LMZ31520 relies on a precision trimmed 0.6 V reference for the feedback voltage regulation and operates by regulating the valley of the voltage ripple appearing at the VADJ pin. The voltage ripple is a function of the input voltage and the output voltage, therefore the RSET resistor will Change based on the input voltage.

LMZ31520 Chinese data sheet: Click to download

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