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LM2852YMXAX-1.0 Arkusz danych(PDF) 10 Page - Texas Instruments

Numer części LM2852YMXAX-1.0
Szczegółowy opis  LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER짰 Buck Regulator
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LM2852YMXAX-1.0 Arkusz danych(HTML) 10 Page - Texas Instruments

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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 CESR 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
VOUT (V)
PVIN (V)
L (µH)
C (µF)
CESR (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 (<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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Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM2852


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