LM2594M-12 National Semiconductor, LM2594M-12 Datasheet - Page 17

• Manufacturer Part Number: LM2594M-12
• Description: IC, STEP-DOWN REGULATOR, 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LM2594M-12

• Primary Input Voltage: 25V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 500mA
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 4.5V To 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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