TC2575 datasheet(2/25 Pages) TELCOM

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TC2575

1.0A Step-Down Switching Regulator

TC2575-1 3/13/00

ABSOLUTE MAXIMUM RATINGS*

Maximum Supply Voltage ................................ VIN = 45V

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

≤ V ≤ +VIN

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.

ELECTRICAL CHARACTERISTICS: (Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable

version,VIN = 25V for the 12V version. ILOAD = 200mA. For typical values TJ = 25°C, for min/max values TJ is the operating

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]

VOUT

Output Voltage

VIN = 12V, ILOAD = 0.2A, TJ = 25°C

3.234

3.3

3.366

4.75V

≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A

TJ = 25°C

3.168

3.3

3.432

TJ = –40°C to +125°

3.135

—

3.465

Efficiency

VIN = 12V, ILOAD = 1.0A

—

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

VOUT

Output Voltage

VIN = 12V, ILOAD = 0.2A, TJ = 25°C

4.9

5.0

5.1

8.0V

≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A

TJ = 25°C

4.8

5.0

5.2

TJ = –40°C to +125°C

4.75

—

5.25

Efficiency

VIN = 12V, ILOAD = 1.0 A

—

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

VOUT

Output Voltage

VIN = 25V, ILOAD = 0.2A, TJ = 25°C

11.76

12.24

15V

≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A

TJ = 25°C

11.52

12.48

TJ = –40°C to +125°C

11.4

—

12.6

Efficiency

VIN = 15V, ILOAD = 1.0 A

—

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

VFB

Feedback Voltage

VIN = 12V, ILOAD = 0.2A, VOUT = 5.0V,

1.217

1.23

1.243

TJ = 25°C

VFB

Feedback Voltage

8.0V

≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A

VOUT = 5.0V

TJ = 25°C

1.193

1.23

1.267

TJ = –40°C to +125°C

1.18

—

1.28

Efficiency

VIN = 12V, ILOAD = 1.0A, VOUT = 5.0V

—

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.

2. Tested junction temperature range for the TC2575: TLOW = –40°C THIGH = +125°C

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