LM2594/LM2594HV Series Buck Regulator Design Procedure (Continued)
VR
1A Diodes
Surface Mount
Through Hole
Ultra Fast
Schot-
Ultra Fast
Schottky
tky
Recovery
Recovery
20V
All of
these
1N5817
All of these
diodes are
rated to at
least 60V.
SR102
1N5818
SR103
diodes are
rated to at
least 60V.
MBRS130
30V
40V
11DQ03
1N5819
SR104
MBRS140
10BQ040
10MQ040
MBRS160
10BQ050
10MQ060
MBRS1100
10MQ090
SGL41-60
SS16
MURS120
10BF10
MUR120
HER101
11DF1
11DQ04
SR105
50V
or
more
MBR150
11DQ05
MBR160
SB160
11DQ10
FIGURE 11. Diode Selection Table
Block Diagram
DS012439-21
FIGURE 12.
Ground — Circuit ground.
Application Information
Output — Internal switch. The voltage at this pin switches
between (+VIN − VSAT) and approximately −0.5V, with a duty
cycle of VOUT/VIN. To minimize coupling to sensitive circuitry,
the PC board copper area connected to this pin should be
kept to a minimum.
PIN FUNCTIONS
+VIN — This is the positive input supply for the IC switching
regulator. A suitable input bypass capacitor must be present
at this pin to minimize voltage transients and to supply the
switching currents needed by the regulator.
17
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