LM2576 datasheet(3/26 Pages) ONSEMI

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LM2576

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OPERATING RATINGS (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.)

Rating

Symbol

Value

Unit

Operating Junction Temperature Range

−40 to +125

°C

Supply Voltage

Vin

SYSTEM PARAMETERS (Note 1 Test Circuit Figure 15)

ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V

for the 12 V version, and Vin = 30 V for the 15 V version. ILoad = 500 mA. For typical values TJ = 25°C, for min/max values TJ is the

operating junction temperature range that applies Note 2, unless otherwise noted.)

Characteristics

Symbol

Min

Typ

Max

Unit

LM2576−3.3 (Note 1 Test Circuit Figure 15)

Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)

Vout

3.234

3.3

3.366

Output Voltage (6.0 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

TJ = 25°C

3.168

3.3

3.432

TJ = −40 to +125°C

3.135

−

3.465

Efficiency (Vin = 12 V, ILoad = 3.0 A)

−

LM2576−5 (Note 1 Test Circuit Figure 15)

Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)

Vout

4.9

5.0

5.1

Output Voltage (8.0 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

TJ = 25°C

4.8

5.0

5.2

TJ = −40 to +125°C

4.75

−

5.25

Efficiency (Vin = 12 V, ILoad = 3.0 A)

−

LM2576−12 (Note 1 Test Circuit Figure 15)

Output Voltage (Vin = 25 V, ILoad = 0.5 A, TJ = 25°C)

Vout

11.76

12.24

Output Voltage (15 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

TJ = 25°C

11.52

12.48

TJ = −40 to +125°C

11.4

−

12.6

Efficiency (Vin = 15 V, ILoad = 3.0 A)

−

LM2576−15 (Note 1 Test Circuit Figure 15)

Output Voltage (Vin = 30 V, ILoad = 0.5 A, TJ = 25°C)

Vout

14.7

15.3

Output Voltage (18 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

TJ = 25°C

14.4

15.6

TJ = −40 to +125°C

14.25

−

15.75

Efficiency (Vin = 18 V, ILoad = 3.0 A)

−

LM2576 ADJUSTABLE VERSION (Note 1 Test Circuit Figure 15)

Feedback Voltage (Vin = 12 V, ILoad = 0.5 A, Vout = 5.0 V, TJ = 25°C)

Vout

1.217

1.23

1.243

Feedback Voltage (8.0 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A, Vout = 5.0 V)

Vout

TJ = 25°C

1.193

1.23

1.267

TJ = −40 to +125°C

1.18

−

1.28

Efficiency (Vin = 12 V, ILoad = 3.0 A, Vout = 5.0 V)

−

1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.

When the LM2576 is used as shown in the Figure 15 test circuit, system performance will be as shown in system parameters section

2. Tested junction temperature range for the LM2576:

Tlow = −40°C

Thigh = +125°C

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