Datasheet

LM2852
SNVS325D –JANUARY 2005–REVISED APRIL 2013 www.ti.com
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,
the range of L, C and C
ESR
values is restricted in order to ensure stability.
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 V
OUT
(V) PVIN (V) L (µH) C (µF) C
ESR
(mΩ)
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 (<10mΩ.)
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
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