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LM2576 Datasheet PDF : 8 Pages
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LM2576 Series
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range.
Unless otherwise specified, VIN =12V for the 3.3V, 5V, and Adjustable version, V IN =25V for the 12V version, and VIN =30V for the 15V
version, , ILOAD =500mA.
Symbol
Parameter
Conditions
MIK2576-XX
MIK2576HV-XX
Units
(Limits)
DEVICE PARAMETERS
Typ Limit (Note 2)
Ib
Feedback Bias Current
VOUT =5V (Adjustable Version Only)
50
100/500
nA
fO
Oscillator Frequency
(Note 8)
52
kHz
47/42
kHz(Min)
58/63
kHz(Max)
VSAT
Saturation Voltage
IOUT =3A (Note 4)
1.4
1.8/2.0
V
V(Max)
DC
Max Duty Cycle (ON)
(Note 5)
98
93
%
%(Min)
ICL
Current Limit
(Notes 4, 8)
5.8
4.2/3.5
6.9/7.5
A
A(Min)
A(Max)
IL
Output Leakage Current
Output = 0V
(Notes 6, 7):
2
Output = -1V 7.5
Output = -1V
30
mA(Max)
mA
mA(Max)
IQ
Quiescent Current
(Note 6)
5
mA
10
mA(Max)
ISTBY
Standby Quiescent Current
___
ON/OFF Pin = 5V (OFF)
50
200
µA
µA(Max)
___
ON/OFF CONTROL
VIH
__
VIL
ON/OFF Pin
Logic Input Level
IIH
__
ON/OFF Pin Input
IIL
Current
VOUT = 0V
VOUT = Nominal Output Voltage
__
ON/OFF Pin = 5V (OFF)
__
ON/OFF Pin = 0V (ON)
1.4
2.2/2.4
1.2
1.0/0.8
12
30
0
10
V(Min)
V(Max)
µA
µA(Max)
µA
µA(Max)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating
Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits.
For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: All limits guaranteed at room temperature (standa rd type face) and at temperature extremes (bold type face).
Note 3: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system
performance. When the MIK2576/MIK2576HV is used as shown in the Figure 2 test circuit, system performance will be as
shown in system parameters section of Electrical Characteristics.
Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output.
Note 5: Feedback pin removed from output and connected to 0V.
Note 6: Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V, versions, and +25V for the 12V
and 15V versions, to force the output transistor OFF.
Note 7: VIN =40V (60V for high voltage version).
Note 8: The oscillator frequency reduces to approximately 11 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 protections feature lowers the
average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
BEIJING ESTEK ELECTRONICS CO.,LTD
5
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