LM2576 Series

All Output Voltage Versions

Electrical Characteristics

Symbol

Parameter

Conditions

DEVICE PARAMETERS

MIK2576-XX

MIK2576HV-XX

Typ

Limit (Note 2)

Units

(Limits)

Feedback Bias Current

50

100/500

nA

Oscillator Frequency

(Note 8)

52

Saturation Voltage

1.4

DC

Max Duty Cycle (ON)

(Note 5)

98

Current Limit

(Notes 4, 8)

5.8

Output Leakage Current

(Notes 6, 7):

Output = 0V

47/42

58/63

1.8/2.0

93

4.2/3.5

6.9/7.5

2

kHz

kHz(Min)

kHz(Max)

V

V(Max)

%

%(Min)

A

A(Min)

A(Max)

mA(Max)

Output = -1V

Output = -1V

7.5

30

mA

mA(Max)

Quiescent Current

(Note 6)

5

10

mA

mA(Max)

Standby Quiescent Current

___

ON/OFF Pin = 5V (OFF)

50

200

µA

µA(Max)

___

ON/OFF CONTROL

__

ON/OFF Pin

1.4

2.2/2.4

V(Min)

Logic Input Level

1.2

1.0/0.8

V(Max)

__

ON/OFF Pin Input

Current

__

ON/OFF Pin = 5V (OFF)

__

ON/OFF Pin = 0V (ON)

12

0

30

10

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 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%.

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