3A, 52kHz, Step-Down Switching Regulator

LM2576

Dec 2011 – Rev. 1.3

- 6

-

HTC

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

LM2576-3.3V ([Note 1] Test Circuit Figure 2)

Vout

3.234

3.3

3.366

V

Vout

V

3.168

3.3

3.432

3.135

-

3.465

η

-

75

-

%

LM2576-5.0V ([Note 1] Test Circuit Figure 2)

Vout

4.9

5.0

5.1

V

Vout

V

4.8

5.0

5.2

4.75

-

5.25

η

-

77

-

%

LM2576-12V ([Note 1] Test Circuit Figure 2)

Vout

11.76

12

12.24

V

Vout

V

11.52

12

12.48

11.4

-

12.6

η

-

88

-

%

LM2576-ADJ ([Note 1] Test Circuit Figure 2)

Vout

1.217

1.23

1.243

V

Vout

V

1.193

1.23

1.267

1.18

-

1.28

η

-

77

-

%

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