LM2576TV-15 查看數據表（PDF） - ON Semiconductor
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LM2576TV-15 Datasheet PDF : 28 Pages
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LM2576
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)
TJ = 25°C
TJ = −40 to +125°C
Oscillator Frequency Note 3
TJ = 25°C
TJ = 0 to +125°C
TJ = −40 to +125°C
Saturation Voltage (Iout = 3.0 A Note 4)
TJ = 25°C
TJ = −40 to +125°C
Max Duty Cycle (“on”) Note 5
Ib
nA
−
25
100
−
−
200
fosc
kHz
−
52
−
47
−
58
42
−
63
Vsat
V
−
1.5
1.8
−
−
2.0
DC
94
98
−
%
Current Limit (Peak Current Notes 3 and 4)
TJ = 25°C
TJ = −40 to +125°C
Output Leakage Current Notes 6 and 7, TJ = 25°C
Output = 0 V
Output = −1.0 V
ICL
A
4.2
5.8
6.9
3.5
−
7.5
IL
mA
−
0.8
2.0
−
6.0
20
Quiescent Current Note 6
TJ = 25°C
TJ = −40 to +125°C
IQ
mA
−
5.0
9.0
−
−
11
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
TJ = 25°C
TJ = −40 to +125°C
Istby
mA
−
80
200
−
−
400
ON/OFF Pin Logic Input Level (Test Circuit Figure 15)
Vout = 0 V
TJ = 25°C
TJ = −40 to +125°C
Vout = Nominal Output Voltage
TJ = 25°C
TJ = −40 to +125°C
V
VIH
2.2
1.4
−
2.4
−
−
VIL
−
1.2
1.0
−
−
0.8
ON/OFF Pin Input Current (Test Circuit Figure 15)
ON/OFF Pin = 5.0 V (“off”), TJ = 25°C
ON/OFF Pin = 0 V (“on”), TJ = 25°C
mA
IIH
−
15
30
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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