UCC29421, UCC29422, UCC39421, UCC39422

MULTIMODE HIGHFREQUENCY PWM CONTROLLER

SLUS246C − OCTOBER 1999 − REVISED FEBRUARY 2005

2

POST OFFICE BOX 655303

description (continued)

Other features include pulse-by-pulse current limiting, and a low 5-

µA quiescent current during shutdown. The

UCC39422 incorporates programmable power-on reset circuitry and an uncommitted comparator for low

voltage detection. The available packages are 20-pin TSSOP or 20-pin N for the UCC39422, and 16-pin TSSOP

or 16-pin N for the UCC39421.

Supply Voltage (VIN, VOUT,VPUMP)

8 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CP

8 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RSEN

–0.3 V to 12 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYNC/SD

–0.3 V to 5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ISENSE

–0.3 V to 1 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead Temperature (Soldering, 10 seconds)

300

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

‡ All voltages are with respect to ground. Currents are positive into and negative out of the specified terminals. Consult the Packaging Section of

the Databook for thermal limitations and considerations of the package.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

RESETB

RSEN

VOUT

RECT

PGND

CHRG

VPUMP

CP

VIN

LOWBAT

RSADJ

RSEL

COMP

FB

PFM

GND

RT

SYNC/SD

ISENSE

VDET

TSSOP−20, DIL−20

N, PW PACKAGES

(TOP VIEW)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

RSEN

VOUT

RECT

PGND

CHRG

VPUMP

CP

VIN

RSEL

COMP

FB

PFM

GND

RT

SYNC/SD

ISENSE

TSSOP−16, DIL−16

N, PW PACKAGE

(TOP VIEW)