LM2575 datasheet(2/28 Pages) MOTOROLA

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LM2575

MOTOROLA ANALOG IC DEVICE DATA

Figure 1. Block Diagram and Typical Application

7.0 V – 40 V

Unregulated

DC Input

330

µH

Gnd

+Vin

Cin

100

µF

3ON/OFF

Output

Feedback

1N5819

Cout

330

µF

Typical Application (Fixed Output Voltage Versions)

Representative Block Diagram and Typical Application

Unregulated

DC Input

+Vin

Cout

Feedback

Cin

1.0 k

Output

Gnd

ON/OFF

Reset

Latch

Thermal

Shutdown

52 kHz

Oscillator

1.235 V

Band–Gap

Reference

Freq

Shift

18 kHz

Comparator

Fixed Gain

Error Amplifier

Current

Limit

Driver

1.0 Amp

Switch

ON/OFF

3.1 V Internal

Regulator

Regulated

Output

Vout

Load

Output

Voltage Versions

3.3 V

5.0 V

12 V

15 V

(

Ω)

1.7 k

3.1 k

8.84 k

11.3 k

For adjustable version

R1 = open, R2 = 0

Ω

LM2575

5.0 V Regulated

Output 1.0 A Load

This device contains 162 active transistors.

ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond

which damage to the device may occur.)

Rating

Symbol

Value

Unit

Maximum Supply Voltage

Vin

ON/OFF Pin Input Voltage

–

–0.3 V

≤ V ≤ +Vin

Output Voltage to Ground (Steady–State)

–

–1.0

Power Dissipation

Case 314B and 314D (TO–220, 5–Lead)

Internally Limited

Thermal Resistance, Junction–to–Ambient

θJA

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Case 936A (D2PAK)

Internally Limited

Thermal Resistance, Junction–to–Ambient

(Figure 34)

θJA

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Storage Temperature Range

Tstg

–65 to +150

°C

Minimum ESD Rating (Human Body Model: C

= 100 pF, R = 1.5 k

Ω)

–

3.0

Lead Temperature (Soldering, 10 s)

–

260

°C

Maximum Junction Temperature

150

°C

NOTE:

ESD data available upon request.

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