OBSOLETE

LM2575EP, LM2575HVEP

SNVS301B – DECEMBER 2004 – REVISED APRIL 2013

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ALL OUTPUT VOLTAGE VERSIONS

ELECTRICAL CHARACTERISTICS

(1)

LM2575-XXEP

Units

LM2575HV-XXEP

Symbol

Parameter

Conditions

Typ

(Limits)

DEVICE PARAMETERS

Feedback Bias Current

50

100/500

nA

Oscillator Frequency

52

kHz

47/42

kHz(Min)

58/63

kHz(Max)

Saturation Voltage

(4)

0.9

V

1.2/1.4

V(Max)

DC

Max Duty Cycle (ON)

98

%

93

%(Min)

Current Limit

2.2

A

1.7/1.3

A(Min)

3.0/3.2

A(Max)

Output Leakage

(6) (7)

Output = 0V

2

mA(Max)

Current

Output =

−1V

7.5

mA

Output =

−1V

30

mA(Max)

Quiescent Current

5

mA

10

mA(Max)

Standby Quiescent

ON /OFF Pin = 5V (OFF)

50

μA

Current

200

μA(Max)

Thermal Resistance

65

45

°C/W

KC Package, Junction to Case

2

85

100

37

(1)

"Testing and other quality control techniques are used to the extent deemed necessary to ensure product performance over the

specified temperature range. Product may not necessarily be tested across the full temperature range and all parameters may not

necessarily be tested. In the absence of specific PARAMETRIC testing, product performance is assured by characterization and/or

design."

(2)

All limits ensured at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits

are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control

(SQC) methods.

(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 power

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 0V.

(6)

Feedback (pin 4) 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.

(7)

(8)

Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads in a

socket, or on a PC board with minimum copper area.

(9)

Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads

soldered to a PC board containing approximately 4 square inches of copper area surrounding the leads.

(10) Junction to ambient thermal resistance with approximately 1 square inch of pc board copper surrounding the leads. Additional copper

area will lower thermal resistance further. See thermal model in Switchers made Simple software.

(11) If the DDPAK package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to

the package: Using 0.5 square inches of copper area,

more square inches of copper area,

8

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