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LM2853

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SNVS459A – OCTOBER 2006 – REVISED SEPTEMBER 2017

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8.1.9 Split-Rail Operation

The LM2853 can be powered using two separate voltages for AVIN and PVIN. AVIN is the supply for the control

logic; PVIN is the supply for the power FETs. The output filter components need to be chosen based on the

value of PVIN. For PVIN levels lower than 3.3 V, use output filter component values recommended for 3.3 V.

PVIN must always be equal to or less than AVIN.

Figure 9. Split-Rail Operation Example Circuit

8.1.10 Switch Node Protection

The LM2853 includes protection circuitry that monitors the voltage on the switch pin. Under certain fault

conditions, switching is disabled in order to protect the switching devices. One side effect of the protection

circuitry may be observed when power to the LM2853 is applied with no or light load on the output. The output

will regulate to the rated voltage, but no switching may be observed. As soon as the output is loaded, the

LM2853 will begin normal switching operation.

8.2 Typical Application

Figure 10. LM2853 Typical Application Circuit