LM2576-12 MOTOROLA [Motorola, Inc], LM2576-12 Datasheet - Page 4

• Manufacturer Part Number: LM2576-12
• Description: Easy Switcher 3.0A Step-Down Voltage Regulator
• Manufacturer: MOTOROLA [Motorola, Inc]

DEVICE PARAMETERS
ELECTRICAL CHARACTERISTICS
the 12 V version, and V in = 30 V for the 15 V version. I Load = 500 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.)
ALL OUTPUT VOLTAGE VERSIONS
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
4
Feedback Bias Current (V out = 5.0 V [Adjustable Version Only])
Oscillator Frequency [Note 3]
Saturation Voltage (I out = 3.0 A [Note 4])
Max Duty Cycle (“on”) [Note 5]
Current Limit (Peak Current [Notes 3 and 4])
Output Leakage Current [Notes 6 and 7], T J = 25 C
Quiescent Current [Note 6]
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
ON/OFF Pin Logic Input Level (Test Circuit Figure 15)
ON/OFF Pin Input Current (Test Circuit Figure 15)
T J = 25 C
T J = –40 to +125 C
T J = 25 C
T J = 0 to +125 C
T J = –40 to +125 C
T J = 25 C
T J = –40 to +125 C
T J = 25 C
T J = –40 to +125 C
Output = 0 V
Output = –1.0 V
T J = 25 C
T J = –40 to +125 C
T J = 25 C
T J = –40 to +125 C
V out = 0 V
V out = Nominal Output Voltage
ON/OFF Pin = 5.0 V (“off”), T J = 25 C
ON/OFF Pin = 0 V (“on”), T J = 25 C
T J = 25 C
T J = –40 to +125 C
T J = 25 C
T J = –40 to +125 C
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
7. V in = 40 V.
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%.
versions, to force the output transistor “off”.
Characteristics
(Unless otherwise specified, V in = 12 V for the 3.3 V, 5.0 V, and Adjustable version, V in = 25 V for
LM2576
Symbol
I stby
V sat
f osc
I CL
V IH
DC
V IL
I IH
I Q
I IL
I b
I L
MOTOROLA ANALOG IC DEVICE DATA
Min
4.2
3.5
2.2
2.4
47
42
94
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Typ
1.5
5.8
0.8
6.0
5.0
1.4
1.2
25
52
98
80
15
–
–
–
–
–
–
–
–
–
0
Max
100
200
200
400
1.8
2.0
6.9
7.5
2.0
9.0
1.0
0.8
5.0
58
63
20
11
30
–
–
–
–
Unit
kHz
mA
mA
nA
%
V
A
V
A
A