LM2576T-5.0 查看數據表（PDF） - Bay Linear

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LM2576T-5.0

3.0A Step Down Switching voltage Regulator

Bay Linear 

LM2576

ELECTRICAL CHARACTERISTICS TA = 25°C VIN = 12V, ILOAD= 100mA unless otherwise specified.

Boldface type applies over full Operating Temperature Range.

Parameters

Conditions

Adjustable Regulator

Feedback Bias Current

VOUT = 5V

Fixed and Adjustable Regulators

Oscillator Frequency

Saturation Voltage

IOUT = 0.5A, (Note 4)

Max Duty Cycle

(Note 5)

Current Limit

Peak Current, tON≤ 3µs, (Note 4)

Output Leakage Current

VIN, (Note 6), Output = 0V

(Note 6 ), Output = -1V

Quiescent Current

(Note 6)

Standby Quiescent Current

ON/OFF Pin = 5V (OFF)

T,U package, Junction to Ambient,

Thermal Resistance

(Note 7)

T,U package, Junction to case

ON/OFF Control, Fixed & Adjustable Regulators (Note 8) (Note9)

OFF Input Level

VOUT = 0V

ON Input Level

OFF Logic Current

VOUT = 15V or 5V

ON/OFF Pin = 5V (OFF)

Typ

LM2576

Min

Units

Max

50

100

500

nA

52

47

42

58

63

kHz

1.4

1.8

2.0

V

98

93

%

5.8

4.2

3.5

6.9

7.5

A

7.5

2

30

mA

5

10

mA

50

200

µA

65

2

°C/W

1.4

2.2

2.4

V

1.2

1.0

0.8

V

4

30

µA

ON Logic Current

ON/OFF Pin = 0V (ON)

0.01

10

µA

Note 1: Absolute Maxium Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate test conditions for which the device s

intended to be functional, but do not guarantee specific performance limits. For quaranteed specifications and test conditions see the Electrical Characteristics.

Note 2: All limits guaranteed 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 guaranteed via testing.

Note 3: External components such as the diode, inductor and capacitor can affect the system performance.

Note 4: Output (pin 2) sourcing current. No diode, inductor, or capacitor connected to input.

Note 5: Feedback (pin 4) removed from output and connected to 0V.

Note 6: Feedback (pin 4) removed from output and connected to 12V to force the output transistor OFF.

Note 7: Junction to ambient thermal resistance with approximately 1 square inches of PC board cooper surrounding the leads.

Note 8: Test circuit refers to figure 2.

Note 9: Test circuit refers to figure 3.

Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556

www.baylinear.com

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