TC2575

1.0A Step-Down Switching Regulator

2

TC2575-1 3/13/00

ABSOLUTE MAXIMUM RATINGS*

ON/OFF Pin Input Voltage ..................... –0.3V

Output Voltage to Ground (Steady State) ............... –1.0 V

Max Power Dissipation(TO-220) ......... (Internally Limited)

Thermal Resistance, Junction-to-Ambient ..... 65

°C/W

Thermal Resistance, Junction-to-Case ........ 5.0

°C/W

Storage Temperature Range ................. –65

°C to +150°C

Minimum ESD Rating ............................................. 3.0 kV

(Human Body Model: C = 100pF, R = 1.5k

Ω)

Lead Temperature (Soldering, 10 seconds) .......... 260

°C

Maximum Junction Temperature ............................. 150

°C

Operating Junction Temperature Range .... –40 to +125*C

Supply Voltage ............................................................ 40V

*This is a stress rating only, and functional operation of the device at these

or any other conditions beyond those indicated in the operation section of

the specifications is not implied. Exposure to absolute maximum ratings

conditions for extended periods of time may affect device reliability.

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

Symbol

Parameter

Test Conditions

Min

Typ

Max

Units

TC2575-3.3 [(Note 1) Test Circuit Figure 2]

Output Voltage

3.234

3.3

3.366

V

4.75V

3.168

3.3

3.432

3.135

—

3.465

η

Efficiency

—

75

—

%

TC2575-5 [(Note 1)Test Circuit Figure 2]

Output Voltage

4.9

5.0

5.1

V

8.0V

4.8

5.0

5.2

4.75

—

5.25

η

Efficiency

—

77

—

%

TC2575-12 [(Note 1) Test Circuit Figure 2]

Output Voltage

11.76

12

12.24

V

15V

11.52

12

12.48

11.4

—

12.6

η

Efficiency

—

88

—

%

TC2575-Adjustable Version [(Note 1) Test Circuit Figure 2]

Feedback Voltage

1.217

1.23

1.243

V

Feedback Voltage

8.0V

1.193

1.23

1.267

1.18

—

1.28

η

Efficiency

—

77

—

%

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

performance. When the TC2575 is used as shown in the Figure 2 test circuit, the system performance will be as

shown in the system parameters section of the Electrical Characteristics.