LM2596SX-3.3/NOPB National Semiconductor, LM2596SX-3.3/NOPB Datasheet - Page 27

IC REG SW 3.3V 3A STP DN TO263-5

LM2596SX-3.3/NOPB

Manufacturer Part Number
LM2596SX-3.3/NOPB
Description
IC REG SW 3.3V 3A STP DN TO263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet

Specifications of LM2596SX-3.3/NOPB

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
Current - Output
3A
Frequency - Switching
150kHz
Voltage - Input
4.5 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2596SX-3.3
*LM2596SX-3.3/NOPB
LM2596SX-3.3

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LM2596SX-3.3/NOPB
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Application Information
INVERTING REGULATOR SHUTDOWN METHODS
To use the ON /OFF pin in a standard buck configuration is
simple, pull it below 1.3V (
turn regulator ON, pull it above 1.3V to shut the regulator
FIGURE 28. Inverting Regulator Ground Referenced Shutdown using Opto Device
@
25˚C, referenced to ground) to
FIGURE 27. Inverting Regulator Ground Referenced Shutdown
(Continued)
27
OFF. With the inverting configuration, some level shifting is
required, because the ground pin of the regulator is no
longer at ground, but is now setting at the negative output
voltage level. Two different shutdown methods for inverting
regulators are shown in Figure 27 and 28.
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