4

Rev. 2.1

08/20/02

IRU3007

www.irf.com

PIN DESCRIPTIONS

Note 1: Vs refers to the set point voltage given in Table 1

D4

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

D3

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

D2

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

D1

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

D0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

Vs

1.30

1.35

1.40

1.45

1.50

1.55

1.60

1.65

1.70

1.75

1.80

1.85

1.90

1.95

2.00

2.05

D4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

D3

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

D2

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

D1

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

D0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

Vs

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

3.5

Table 1 - Set point voltage vs. VID codes

Output driver for the high-side power MOSFET for the I/O supply.

This pin is connected to the Source of the power MOSFET for the I/O supply and it

provides the negative sensing for the internal current sensing circuitry.

This pin selects a range of output voltages for the DAC. When in the LO state the range

is 1.3V to 2.05V and when it switches to HI state the range is 2.0V to 3.5V. This pin is

TTL compatible that realizes a logic “1” as either HI or Open. When left open, this pin is

pulled up internally by a 27K

V resistor to 5V supply.

MSB input to the DAC that programs the output voltage. This pin is TTL compatible that

realizes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by

a 27K

V resistor to 5V supply.

Input to the DAC that programs the output voltage. This pin is TTL compatible that real-

izes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by a

27K

V resistor to 5V supply.

Input to the DAC that programs the output voltage. This pin is TTL compatible that real-

izes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by a

27K

V resistor to 5V supply.

LSB input to the DAC that programs the output voltage. This pin is TTL compatible that

realizes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by

a 27K

V resistor to 5V supply.

This pin is an open collector output that switches LO when any of the outputs are outside

10% above the DAC voltage setting.

This pin is connected to the Drain of the power MOSFET of the I/O supply and it provides

the positive sensing for the internal current sensing circuitry. An external resistor pro-

pacitor is placed in parallel with the programming resistor to provide high frequency noise

filtering.

PIN#

PIN SYMBOL

PIN DESCRIPTION

1

2

3

4

5

6

7

8

9

UGate2

Phase2

VID4

VID3

VID2

VID1

VID0

PGood

OCSet2