LM2852

SNVS325D – JANUARY 2005 – REVISED APRIL 2013

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COMPENSATION

The LM2852 provides a highly integrated solution to power supply design. The compensation of the LM2852,

which is type-three, is included on-chip. The benefit to integrated compensation is straightforward, simple power

supply design. Since the output filter capacitor and inductor values impact the compensation of the control loop,

OUTPUT FILTER VALUES

Table 1 details the recommended inductor and capacitor ranges for the LM2852 that are suggested for various

typical output voltages. Values slightly different than those recommended may be used, however the phase

margin of the power supply may be degraded.

Table 1. Output Filter Values

Frequency Option

PVIN (V)

L (µH)

C (µF)

Min

Max

Min

Max

Min

Max

0.8

3.3

10

15

100

220

70

200

0.8

5.0

10

15

100

120

70

200

1.0

3.3

10

15

100

180

70

200

1.0

5.0

10

15

100

180

70

200

1.2

3.3

10

15

100

180

70

200

1.2

5.0

15

22

100

120

70

200

LM2852Y

1.5

3.3

10

15

100

120

70

200

(500kHz)

1.5

5.0

22

22

100

120

70

200

1.8

3.3

10

15

100

120

100

200

1.8

5.0

22

33

100

120

100

200

2.5

3.3

6.8

10

68

120

95

275

2.5

5.0

15

22

68

120

95

275

3.3

5.0

15

22

68

100

100

275

0.8

3.3

The 1500kHz version is

designed for ceramic output

0.8

5.0

capacitors which typically have

1.0

3.3

very low ESR (<10m

Ω.)

1.0

5.0

1.2

3.3

1.2

5.0

LM2852X

1.5

3.3

1

10

(1500kHz)

1.5

5.0

1.8

3.3

1.8

5.0

2.5

3.3

2.5

5.0

3.3

5.0

10

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