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LM2576D2T-15 Arkusz danych(PDF) 4 Page - ON Semiconductor

Numer części LM2576D2T-15
Szczegółowy opis  EASY SWITCHER 3.0 A STEP.DOWN VOLTAGE REGULATOR
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

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DEVICE PARAMETERS
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V
for the 12 V version, and Vin = 30 V for the 15 V 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 = 5.0 V Adjustable Version Only)
Ib
nA
TJ = 25°C
25
100
TJ = −40 to +125°C
200
Oscillator Frequency Note 3
fosc
kHz
TJ = 25°C
52
TJ = 0 to +125°C
47
58
TJ = −40 to +125°C
42
63
Saturation Voltage (Iout = 3.0 A Note 4)
Vsat
V
TJ = 25°C
1.5
1.8
TJ = −40 to +125°C
2.0
Max Duty Cycle (“on”) Note 5
DC
94
98
%
Current Limit (Peak Current Notes 3 and 4)
ICL
A
TJ = 25°C
4.2
5.8
6.9
TJ = −40 to +125°C
3.5
7.5
Output Leakage Current Notes 6 and 7, TJ = 25°C
IL
mA
Output = 0 V
0.8
2.0
Output = −1.0 V
6.0
20
Quiescent Current Note 6
IQ
mA
TJ = 25°C
5.0
9.0
TJ = −40 to +125°C
11
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
Istby
mA
TJ = 25°C
80
200
TJ = −40 to +125°C
400
ON/OFF Pin Logic Input Level (Test Circuit Figure 15)
V
Vout = 0 V
VIH
TJ = 25°C
2.2
1.4
TJ = −40 to +125°C
2.4
Vout = Nominal Output Voltage
VIL
TJ = 25°C
1.2
1.0
TJ = −40 to +125°C
0.8
ON/OFF Pin Input Current (Test Circuit Figure 15)
mA
ON/OFF Pin = 5.0 V (“off”), TJ = 25°C
IIH
15
30
ON/OFF Pin = 0 V (“on”), TJ = 25°C
IIL
0
5.0
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 output 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 (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin.
5. Feedback (Pin 4) removed from output and connected to 0 V.
6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and
15 V versions, to force the output transistor “off”.
7. Vin = 40 V.


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