LM2597HVM-12/NOPB National Semiconductor, LM2597HVM-12/NOPB Datasheet - Page 31
LM2597HVM-12/NOPB
Manufacturer Part Number
LM2597HVM-12/NOPB
Description
IC REG SIMPLE SWITCHER 8-SOIC
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2597M-3.3NOPB.pdf
(34 pages)
Specifications of LM2597HVM-12/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
12V
Current - Output
500mA
Frequency - Switching
150kHz
Voltage - Input
4.5 ~ 60 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Package
8SOIC N
Minimum Input Voltage
4.5 V
Maximum Input Voltage
60 V
Switching Frequency
150(Typ) KHz
Operating Supply Voltage
4.5 to 60 V
Maximum Output Current
0.5 A
Output Type
Fixed
Output Voltage
12 V
Efficiency
88(Typ) %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2597HVM-12
*LM2597HVM-12/NOPB
LM2597HVM-12
*LM2597HVM-12/NOPB
LM2597HVM-12
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2597HVM-12/NOPB
Manufacturer:
NS
Quantity:
6
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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