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UCC2585

UCC3585

DIL-16, SOIC-16, SSOP-16 (TOP VIEW)

J, N, D, and M Packages

ABSOLUTE MAXIMUM RATINGS

Analog Pins

Minimum and Maximum Forced Voltage

(Reference to GND) . . . . . . . . . . . . . . . . . . . –0.3V to +6.3V

Digital Pins

Minimum and Maximum Forced Voltage

(Reference to GND) . . . . . . . . . . . . . . . . . . . . .–0.3V to 6.3V

Power Driver Output Pins

Maximum forced current . . . . . . . . . . . . . . . . . . . . . . . . .

±1.0A

Operating Junction Temperature . . . . . . . . . . –55°C to +125°C

Storage Temperature. . . . . . . . . . . . . . . . . . . –65°C to +150°C

Note: Unless otherwise indicated, voltages are reference to

ground and currents are positive into, negative out of, the spec-

ified terminals. Pulsed is defined as a less than 10% duty cycle

with a maximum duration of 500ns.

NDRV

VIN

CT

PWRGND

PDRV

SD

ISENSE

N/C

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

COMP

ENB

CLSET

TRACK

ISET

SS

VFB

GND

CONNECTION DIAGRAMS

DESCRIPTION (cont.)

The UCC2585/UCC3585 drives a complementary pair of

power MOSFET transistors, P-channel on the high side,

and N-channel on the low side to step down the input

voltage at up to 90% efficiency.

A programmable two-level current limiting function is pro-

vided by sensing the voltage drop across the high side P

channel MOSFET. This circuit can be configured to pro-

vide pulse-by-pulse limiting, timed shutdown after 7 con-

secutive faults, or latch-off after fault detection, allowing

maximum application flexibility. The current limit thresh-

old is programmed with a single resistor selected to

match system MOSFET characteristics.

The UCC2585/UCC3585 also includes undervoltage

lockout, a logic controlled enable, and softstart functions.

The UCC2585/UCC3585 is offered in the 16 pin surface

mount and through hole packages.

APPLICATIONS

• Low Voltage Microprocessor Power such as PowerPC

603 and 604

• High Power 5V or 3.3V to 1.25V–4.5V Regulators

• GTL Bus Termination