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LM2576TV-12 Fiches technique(PDF) 4 Page - Motorola, Inc

No de pièce LM2576TV-12
Description  Easy Switcher 3.0A Step-Down Voltage Regulator
Download  28 Pages
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Fabricant  MOTOROLA [Motorola, Inc]
Site Internet  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

LM2576TV-12 Fiches technique(HTML) 4 Page - Motorola, Inc

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LM2576
4
MOTOROLA ANALOG IC DEVICE DATA
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
µA
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)
µA
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
NOTES: 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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