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LM2576T-ADJ Datasheet(PDF) 7 Page - Tiger Electronic Co.,Ltd

No. de pieza LM2576T-ADJ
Descripción Electrónicos  regulators are monolithic integrated circuits that provide all the active functions for a step-down switching
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Fabricante Electrónico  TGS [Tiger Electronic Co.,Ltd]
Página de inicio  http://www.tgselec.com
Logo TGS - Tiger Electronic Co.,Ltd

LM2576T-ADJ Datasheet(HTML) 7 Page - Tiger Electronic Co.,Ltd

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LM2576 Series
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range.
Unless otherwise specified, VIN =12V for the 3.3V, 5V, and Adjustable version, VIN =25V for the 12V version, and VIN =30V for the 15V
version, , ILOAD =500mA.
Symbol
Parameter
Conditions
DEVICE PARAMETERS
LM2576-XX
XXX
XLM
LM2576HV-XX
Typ
Limit
(Note 2)
Units
(Limits)
Ib
Feedback Bias Current
VOUT =5V (Adjustable Version Only)
50
100/500
nA
fO
Oscillator Frequency
(Note 8)
52
VSAT
Saturation Voltage
IOUT =3A (Note 4)
1.4
DC
Max Duty Cycle (ON)
(Note 5)
98
ICL
Current Limit
(Notes 4, 8)
5.8
IL
Output Leakage Current
(Notes 6, 7):
Output = 0V
47/42
58/63
1.8/2.0
93
4.2/3.5
6.9/7.5
2
kHz
kHz(Min)
kHz(Max)
V
V(Max)
%
%(Min)
A
A(Min)
A(Max)
mA(Max)
Output = -1V
Output = -1V
7.5
30
mA
mA(Max)
IQ
Quiescent Current
(Note 6)
5
10
mA
mA(Max)
ISTBY
Standby Quiescent Current
___
ON/OFF Pin = 5V (OFF)
50
200
µA
µA(Max)
___
ON/OFF CONTROL
VIH
__
ON/OFF Pin
VOUT = 0V
1.4
2.2/2.4
V(Min)
VIL
Logic Input Level
VOUT = Nominal Output Voltage
1.2
1.0/0.8
V(Max)
IIH
IIL
__
ON/OFF Pin Input
Current
__
ON/OFF Pin = 5V (OFF)
__
ON/OFF Pin = 0V (ON)
12
0
30
10
µA
µA(Max)
µA
µA(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:
All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face).
Note 3:
External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system
performance. When the LM2576/ LM2576HV is used as shown in the Figure 2 test circuit, system performance will be a
s
shown in system parameters section of Electrical Characteristics.
Note 4:
Output pin sourcing current. No diode, inductor or capacitor connected to output.
Note 5:
Feedback pin removed from output and connected to 0V.
Note 6:
Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V, versions, and +25V for the 12V
and 15V versions, to force the output transistor OFF.
Note 7:
VIN =40V (60V for high voltage version).
Note 8:
The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes the
regulated output voltage to drop approximately 40% from the nominal output voltage. This self protections feature lowers the
average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
5
ELECTRONICS CO.,LTD
TIGER


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