LM2597N-ADJ National Semiconductor, LM2597N-ADJ Datasheet - Page 31
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LM2597N-ADJ
Manufacturer Part Number
LM2597N-ADJ
Description
IC, STEP-DOWN VOLTAGE REGULATOR, 8-DIP
Manufacturer
National Semiconductor
Datasheet
1.LM2597M-3.3NOPB.pdf
(34 pages)
Specifications of LM2597N-ADJ
Input Voltage
40V
Output Current
500mA
No. Of Outputs
1
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Mounting Type
Through Hole
Output Voltage Min
1.23V
Leaded Process Compatible
No
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Application Information
(Continued)
eral hundred mA on the regulated positive output for the
charge pump to work correctly. Also, resistor R1 is required
to limit the charging current of C1 to some value less than
the LM2597 current limit (typically 800 mA).
This method of generating a negative output voltage without
an additional inductor can be used with other members of
the Simple Switcher Family, using either the buck or boost
topology.
DS012440-51
FIGURE 34. Charge Pump for Generating a
Low Current, Negative Output Voltage
31
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