LM2576

3

MOTOROLA ANALOG IC DEVICE DATA

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

TJ

–40 to +125

°C

Supply Voltage

Vin

40

V

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

V

Output Voltage (6.0 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

V

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)

η

–

75

–

%

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

V

Output Voltage (8.0 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

V

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)

η

–

77

–

%

LM2576–12 ([Note 1] Test Circuit Figure 15)

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

Vout

11.76

12

12.24

V

Output Voltage (15 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

V

TJ = 25°C

11.52

12

12.48

TJ = –40 to +125°C

11.4

–

12.6

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

η

–

88

–

%

LM2576–15 ([Note 1] Test Circuit Figure 15)

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

Vout

14.7

15

15.3

V

Output Voltage (18 V

≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)

Vout

V

TJ = 25°C

14.4

15

15.6

TJ = –40 to +125°C

14.25

–

15.75

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

η

–

88

–

%

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

V

Feedback Voltage (8.0 V

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

Vout

V

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)

η

–

77

–

%

NOTES: 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