OUTPUT FILTER CAPACITORS

The capacitors that may be used in the output filter with the

LM2852 are limited in value and ESR range according to

Table 1. Below are some examples of capacitors that can

typically be used in an LM2852 application.

TABLE 3. LM2852 Output Filter Capacitors

Capacitance (µF)

Part Number

Chemistry

Vendor

10

GRM31MR61A106KE19

Ceramic

Murata

10

GRM32DR61E106K

Ceramic

Murata

68

595D686X_010C2T

Tantalum

Vishay - Sprague

68

595D686X_016D2T

Tantalum

Vishay - Sprague

100

595D107X_6R3C2T

Tantalum

Vishay - Sprague

100

595D107X_016D2T

Tantalum

Vishay - Sprague

100

NOSC107M004R0150

Niobium Oxide

AVX

100

NOSD107M006R0100

Niobium Oxide

AVX

120

595D127X_004C2T

Tantalum

Vishay - Sprague

120

595D127X_010D2T

Tantalum

Vishay - Sprague

150

595D157X_004C2T

Tantalum

Vishay - Sprague

150

595D157X_016D2T

Tantalum

Vishay - Sprague

150

NOSC157M004R0150

Niobium Oxide

AVX

150

NOSD157M006R0100

Niobium Oxide

AVX

220

595D227X_004D2T

Tantalum

Vishay - Sprague

220

NOSD227M004R0100

Niobium Oxide

AVX

220

NOSE227M006R0100

Niobium Oxide

AVX

SPLIT-RAIL OPERATION

The LM2852 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 3.3V, use output filter component

values recommended for 3.3V. PVIN must always be equal

to or less than AVIN.

20127014

SWITCH NODE PROTECTION

The LM2852 includes protection circuitry that monitors the

voltage on the switch pin. Under certain conditions, switch-

ing is disabled in order to protect the switching devices. One

result of the protection circuitry may be observed when

power to the LM2852 is applied with no or light load on the

output. The output regulates to the rated voltage, but no

switching may be observed. As soon as the output is loaded,

the LM2852 begins normal switching operation.

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