LM2596 Просмотр технического описания (PDF) - Estek Electronics Co. Ltd
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LM2596 Datasheet PDF : 13 Pages
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LM2596
Specifications with standard type face are for TJ = 250C, and those with boldface type apply over full Operating
Temperature Range
LM2596-ADJ
Symbol
Parameter
Conditions
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5)Test Circuit Figure 1
VOUT
Output Voltage
4.5VVIN40V, 0.2AILOAD3A
VOUT programmed for 3V. Circuit of
Figure 1.
1.230
1.193/1.180
1.267/1.280
Efficiency
VIN=12V, VOUT=3V, ILOAD=3A
Units
(Limits)
V
V(min)
V(max)
ALL OUTPUT VOLTAGE VERSIONS
ELECTRICAL CHARACTERISTICS
Specifications with standard type face are for TJ = 250C, and those with boldface type apply over full Operating Temperature
Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V version. ILOAD
= 500 mA
Symbol
Parameter
Conditions
LM2596-XX
Typ
Limit
(Note 3)
(Note 4)
Units
(Limits)
DEVICE PARAMETERS
Ib
Feedback Bias Current
Adjustable Version Only, VFB=1.3V
10
nA
50/100
nA (max)
fO Oscillator Frequency
(Note 6)
150
kHz
127/110 kHz (min)
173/173 kHz (max)
VSAT
Saturation Voltage IOUT=3A (Notes 7, 8)
1.16
V
1.4/1.5
V (max)
DC Max Duty Cycle (ON)
Min Duty Cycle (OFF)
(Note 8)
(Note 9)
100
0
%
ICL Current Limit
Peak Current (Notes 7, 8)
4.5
A
3.6/3.4
A (min)
6.9/7.5
A (max)
IL Output Leakage Current Output=0V (Notes 7, 9)
Output=-0.9V (Note 10)
50
A (max)
10
mA
30
mA (max)
IQ Quiescent Current
(Note 9)
5
mA
10
mA (max)
ISTBY
Standby
Quiescent
ON/OFF pin=5V (OFF) (Note 10)
JC Thermal Resistance
TO-220 or TO-263 Package, Junction to Case
JA
TO-220 Package, Junction to Ambient (Note 11)
JA
TO-263 Package, Junction to Ambient (Note 12)
JA
TO-263 Package, Junction to Ambient (Note 13)
JA
TO-263 Package, Junction to Ambient (Note 14)
ON/OFF CONTROL Test Circuit Figure 1
80
A
200/250
A (max)
2
0C/W
50
0C/W
50
0C/W
30
0C/W
20
0C/W
ON/OFF Pin Logic Input
1.3
V
VIH Threshold Voltage
VIL
Low (Regulator ON)
High (Regulator OFF)
0.6
V (max)
2.0
V (min)
IH
VON/OFF Pin Input Current
LOGIC=2.5V (Regulator OFF)
5
A
15
A (max)
VLOGIC=0.5V (Regulator ON)
0.02
A
5
A (max)
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 250C 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 Characteristics.
BEIJING ESTEK ELECTRONICS CO.,LTD
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