LM2575, NCV2575
DEVICE PARAMETERS
for the 12 V version, and V
in
= 30 V for the 15 V version. I
Load
= 200 mA. For typical values T
J
= 25°C, for min/max values T
J
is the
operating junction temperature range that applies [Note 2], unless otherwise noted.)
Characteristics
ALL OUTPUT VOLTAGE VERSIONS
Feedback Bias Current (V
out
= 5.0 V Adjustable Version Only)
T
J
= 25°C
T
J
=
−40
to +125°C
Oscillator Frequency Note 3
T
J
= 25°C
T
J
= 0 to +125°C
T
J
=
−40
to +125°C
Saturation Voltage (I
out
= 1.0 A Note 4)
T
J
= 25°C
T
J
=
−40
to +125°C
Max Duty Cycle (“on”) Note 5
Current Limit (Peak Current Notes 4 and 3)
T
J
= 25°C
T
J
=
−40
to +125°C
Output Leakage Current Notes 6 and 7, T
J
= 25°C
Output = 0 V
Output =
−1.0
V
Quiescent Current Note 6
T
J
= 25°C
T
J
=
−40
to +125°C
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
T
J
= 25°C
T
J
=
−40
to +125°C
ON/OFF Pin Logic Input Level (Test Circuit Figure 14)
V
out
= 0 V
T
J
= 25°C
T
J
=
−40
to +125°C
V
out
= Nominal Output Voltage
T
J
= 25°C
T
J
=
−40
to +125°C
ON/OFF Pin Input Current (Test Circuit Figure 14)
ON/OFF Pin = 5.0 V (“off”), T
J
= 25°C
ON/OFF Pin = 0 V (“on”), T
J
= 25°C
I
b
nA
−
−
−
47
42
−
−
94
1.7
1.4
−
−
−
−
15
−
25
−
52
−
−
1.0
−
98
2.3
−
0.8
6.0
5.0
−
80
−
100
200
kHz
−
58
63
V
1.2
1.3
−
3.0
3.2
mA
2.0
20
mA
9.0
11
200
400
mA
%
A
Symbol
Min
Typ
Max
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, V
in
= 12 V for the 3.3 V, 5.0 V, and Adjustable version, V
in
= 25 V
Unit
f
osc
V
sat
DC
I
CL
I
L
I
Q
I
stby
V
V
IH
2.2
2.4
−
−
−
−
1.4
−
1.2
−
15
0
−
−
1.0
0.8
30
5.0
mA
V
IL
I
IH
I
IL
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. V
in
= 40 V.
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