LM2596T-3.3 National Semiconductor, LM2596T-3.3 Datasheet - Page 5
Manufacturer Part Number
Specifications of LM2596T-3.3
All Output Voltage Versions
Specifications with standard type face are for T
ture Range. Unless otherwise specified, V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 3: Typical numbers are at 25˚C and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to
calculate Average Outgoing Quality Level (AOQL).
Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator
system performance. When the LM2596 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical
Note 6: The switching frequency is reduced when the second stage current limit is activated.
Note 7: No diode, inductor or capacitor connected to output pin.
Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor
Note 10: V
Note 11: Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with the leads soldered to a printed circuit board
with (1 oz.) copper area of approximately 1 in
Note 12: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board with 0.5 in
Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in
Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in
the LM2596S side of the board, and approximately 16 in
model in Switchers Made Simple
Typical Performance Characteristics
ON /OFF Pin Input Current
= 500 mA
version 4.3 software.
of copper on the other side of the p-c board. See Application Information in this data sheet and the thermal
= 12V for the 3.3V, 5V, and Adjustable version and V
= 2.5V (Regulator OFF)
= 0.5V (Regulator ON)
= 25˚C, and those with boldface type apply over full Operating Tempera-
(Circuit of Figure 1 )
= 24V for the 12V ver-
of (1 oz.) copper area.
of (1 oz.) copper area on
of (1 oz.) copper area.