IRU3021MCWTR International Rectifier, IRU3021MCWTR Datasheet - Page 4

• Manufacturer Part Number: IRU3021MCWTR
• Description: IC CTRL/REG SYNC BUCK 28-SOIC
• Manufacturer: International Rectifier

Specifications of IRU3021MCWTR

• Applications: Controller, Intel Processor
• Voltage - Input: 5V, 12V
• Number Of Outputs: 4
• Voltage - Output: 1.3 ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IRU3021M
PIN DESCRIPTIONS
PIN#
4
1
2
3
4
5
6
7
8
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PIN SYMBOL
PGood
Drive2
VID4
VID3
VID2
VID1
VID0
Fix
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
This pin controls the gate of an external MOSFET for the AGP linear regulator.
Leaving this pin open provides fixed output voltages of the 1.5V and 1.8V for the #3 and #4
linear regulators. When this pin is grounded the reference to the linear regulators are set
to 1.26V and therefore the output of the regulators can be programmed to any voltages
above the 1.26V using: V
Where:
R
R
This pin selects a range of output voltages for the DAC. When in the LOW 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 27KV 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 27KV resistor to 5V supply.
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 27KV
resistor to 5V supply.
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 27KV
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 27KV resistor to 5V supply.
This pin is an open collector output that switches LO when any of the outputs are outside
of the specified under-voltage trip point. It also switches low when V
10% above the DAC voltage setting.
PIN DESCRIPTION
TOP
BOT
= Top resistor connected from the output to the V
= Bottom resistor connected from the V
D1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Table 1 - Set point voltage vs. VID codes.
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
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
Vs
OUT
www.irf.com
=1.26 3 (1 + R
D4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TOP
D3
SENSE
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
/R
BOT
pin to ground.
)
D2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
SENSE
pin.
D1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
SEN
D0
1 pin is more than
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
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
Vs
07/17/02
Rev. 1.5