TPS5615, TPS5618, TPS5625, TPS5633

SYNCHRONOUS-BUCK HYSTERETIC REGULATOR CONTROLLER

SLVS177B – SEPTEMBER 1998 – REVISED JULY 2000

7

POST OFFICE BOX 655303

detailed description (continued)

drive regulator

The drive regulator provides drive voltage to the output drivers. The minimum drive voltage is 7 V. The minimum

short circuit current is 100 mA. Connect a 1-

µF ceramic capacitor from DRV to DRVGND.

LODRV

The LODRV circuit is designed to protect the load against overvoltages that occur if the high-side FETs become

shorted. External components to sense an overvoltage condition are required to use this feature. When an

overvoltage fault occurs, LODRV is pulled low and the low-side FET will be turned on, overriding all control

signals inside the TPS56xx controller. The crowbar action will short the system-logic supply to ground through

short circuit.

–0.3 to 14 V

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

Input voltage range: BOOT to DRVGND (high-side driver ON)

–0.3 to 30 V

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

BOOT to HIGHDRV

–0.3 to 15 V

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

BOOT to BOOTLO

–0.3 to 15 V

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

INHIBIT, LODRV

–0.3 to 7.3 V

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

PWRGD, OCP

–0.3 to 7 V

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

LOHIB, LOSENSE, IOUTLO, HISENSE

–0.3 to 14 V

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

VSENSE

–0.3 to 5 V

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

Voltage difference between ANAGND and DRVGND

±0.5 V

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

Output current, VREFB

0.5 mA

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

Short circuit duration, DRV

Continuous

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

Continuous total power dissipation

See Dissipation Rating Table

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

0

°C to 125°C

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

–65

°C to 150°C

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

Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds

260

°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.

NOTE 1: Unless otherwise specified, all voltages are with respect to ANAGND.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

PWP

1150 mW

11.5 mW/

°C

630 mW

460 mW