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LM25085AMY/NOPB Datasheet(PDF) 18 Page - Texas Instruments

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Part # LM25085AMY/NOPB
Description  42V Constant On-Time PFET Buck Switching Controller
PDF  31 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM25085AMY/NOPB Datasheet(HTML) 18 Page - Texas Instruments

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4.5V to 24V
Input
VIN
GND
SHUTDOWN
CIN
33 PF
CBYP
1 PF
RT
21 k:
GND
FB
PGATE
ISEN
ADJ
VCC
CVCC
0.47 PF
CADJ
1000 pF
RADJ
2.05 k:
RSEN
0.01:
L1 6.8 PH
Q1
D1
VOUT
COUT
GND
C1
3300 pF
C2
0.1 PF
R3
48.7 k:
1.0V
68 PF
RFB1
10 k:
RFB2
1.1 k:
RT
VIN
LM25085A
LM25085A
SNVS601B – JANUARY 2009 – REVISED MARCH 2013
www.ti.com
Final Design Example Circuit
The final circuit is shown in Figure 28, and its performance is presented in Figure 29 through Figure 32. The
measured efficiencies shown in Figure 29 are typical for a buck converter producing a low output voltage (1V).
Figure 28. Example Circuit
Figure 29. Efficiency vs. Load Current and VIN (Circuit of Figure 28)
18
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Copyright © 2009–2013, Texas Instruments Incorporated
Product Folder Links: LM25085A



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