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LM2576R-5.0 Datasheet(PDF) 7 Page - HTC Korea TAEJIN Technology Co.

No. de pieza LM2576R-5.0
Descripción Electrónicos  3A, 52kHz, Step-Down Switching Regulator
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Fabricante Electrónico  HTC [HTC Korea TAEJIN Technology Co.]
Página de inicio  http://www.htckorea.co.kr
Logo HTC - HTC Korea TAEJIN Technology Co.

LM2576R-5.0 Datasheet(HTML) 7 Page - HTC Korea TAEJIN Technology Co.

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3A, 52kHz, Step-Down Switching Regulator
LM2576
Dec 2011 – Rev. 1.3
- 7
-
HTC
ELECTRICAL CHARACTERISTICS / Device Parameters
(Unless otherwise specified, Vin = 12V for the 3.3V, 5.0V, and Adjustable version, Vin = 25V for the 12V version.
ILoad = 500 mA. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range
that applies [Note 2], unless otherwise noted.)
Characteristics
Symbol
MIN.
TYP.
MAX.
Unit
All Output Voltage Versions
Feedback Bias Current (Vout=5.0V [Adjustable Version Only])
TJ=25℃
TJ= -40 to +125℃
Ib
-
-
25
-
100
200
nA
Oscillator Frequency [Note 3]
TJ=25℃
TJ= 0 to +125℃
TJ= -40 to +125℃
FOSC
-
47
42
52
-
-
-
58
63
kHz
Saturation Voltage (Iout=3.0A [note 4])
TJ= 25℃
TJ= -40 to +125℃
VSAT
-
-
1.5
-
1.8
2
V
Max Duty Cycle (“0”) [Note 5]
DC
94
98
-
%
Current Limit (Peak Current [Note 3 and 4])
TJ= 25℃
TJ= -40 to +125℃
ICL
4.2
3.5
5.8
-
6.9
7.5
A
Output Leakage Current [Note 6 and 7], TJ=25℃
Output = 0V
Output = -1.0V
IL
-
-
0.8
6
50
30
mA
Quiescent Current [Note 6]
TJ= 25℃
TJ= -40 to +125℃
IQ
-
-
5
-
9
11
mA
Standby Quiescent Current (ON/OFF Pin = 5.0V ("off"))
TJ=25℃
TJ= -40 to +125℃
ISTBY
-
-
80
-
200
400
µA
ON/OFF Pin Logic Input Level (Test circuit Figure 15)
Vout=0V
TJ=25℃
TJ= -40 to +125℃
VIH
2.2
2.4
1.4
-
-
-
V
Vout=Nominal Output Voltage
TJ=25℃
TJ= -40 to +125℃
VIL
-
-
1.2
-
1
0.8
V
ON/OFF Pin Input Current (Test Circuit Figure 15)
ON/OFF Pin = 5.0V (Regulator OFF), TJ=25℃
ON/OFF Pin = 0V (Regulator ON), TJ=25℃
IIH
IIL
-
-
15
0
30
0.5
µA
3. The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the
regulated output voltage to drop approximately 40% from the nominal voltage. This self protection feature lowers the
average dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%
4. Output sourcing current. No diode, inductor or capacitor connected to output pin.
5. Feedback removed from output and connected to 0V.
6. Feedback removed from output and connected to +12V for the Adjustable, 3.3V, and 5.0V versions, and +25V for the 12V
version, to force the output transistor “off”.
7. Vin = 40V.


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