参数资料
| 型号： | IRU3027CW |
| 厂商： | International Rectifier |
| 文件页数： | 4/10页 |
| 文件大小： | 0K |
| 描述： | IC CTRL/REG SYNC BUCK 28-SOIC |
| 标准包装： | 27 |
| 应用： | 控制器，Intel 处理器 |
| 输入电压： | 5V，12V |
| 输出数： | 4 |
| 输出电压： | 1.08 V ~ 1.85 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 其它名称： | *IRU3027CW IRU3027-CW IRU3027-CW-ND |
IRU3027
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
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
1.325
1.350
1.375
1.400
1.425
1.450
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
1.475
1.500
1.525
1.550
1.575
1.600
1.625
1.650
1.675
1.700
1.725
1.750
1.775
1.800
1.825
1.850
Table 1 - Set point voltage vs. VID codes.
PIN DESCRIPTIONS
PIN#
1
2
3
4
5
6
7
8
PIN SYMBOL
Drive2
Fix
VID4
VID3
VID2
VID1
VID0
PGood
PIN DESCRIPTION
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 volt-
ages above the 1.26V using: V OUT = 1.26 3 (1 + R TOP /R BOT )
Where:
R TOP =Top resistor connected from the output to the V SENSE pin
R BOT =Bottom resistor connected from the V SENSE pin to ground.
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 2V 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
of the specified under-voltage trip point. It also switches low when V SEN 1 pin is more than
10% above the DAC voltage setting.
4
www.irf.com
Rev. 1.5
07/17/02
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