FAN5240

PRODUCT SPECIFICATION

4

REV. 1.1.7 8/29/02

Absolute Maximum Ratings

Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life

impaired. Functional operation under these conditions is not implied.

Recommended Operating Conditions

20

SS

Soft Start. A capacitor from this pin to GND programs the slew rate of the converter during

initialization as well as in operation. This pin is used as the reference against which the

output is compared. During initialization, this pin is charged with a 25

µA current source.

Once this pin reaches 0.5V, its function changes, and it assumes the value of the voltage

as set by the VID programming. The current driving this pin is then limited to ±500

µA, that

21

VIN

Input voltage from battery. This voltage is used by the oscillator for feed-forward

compensation of input voltage variation.

28

VCC

VCC. This pin powers the chip. The IC starts to operate when voltage on this pin exceeds

4.6V (UVLO rising) and shuts down when it drops below 4.3V (UVLO falling).

Parameter

Min.

Typ.

Max.

Units

VCC Supply Voltage:

6.5

V

VIN

27

V

BOOT, SW, HDRV Pins

33

V

BOOT to SW

6.5

V

All Other Pins

–0.3

VCC+0.3

V

–10

150

°C

Storage Temperature

–65

150

°C

Lead Soldering Temperature, 10 seconds

300

°C

Parameter

Conditions

Min.

Typ.

Max.

Units

Supply Voltage VCC

4.75

5

5.25

V

Supply Voltage VIN

6

24

V

–20

85

°C

Pin

Number

Pin

Name

Pin Function Description