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参数资料
| 型号： | IRU1030CM |
| 厂商： | International Rectifier |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 3A TO-263-3 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 2.5 V ~ 3.3 V |
| 输入电压： | 最高 7V |
| 电压 - 压降（标准）： | 1.1V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3.1A |
| 工作温度： | 0°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-4，D²Pak（3 引线+接片），TO-263AA |
| 供应商设备封装： | TO-263 |
| 包装： | 管件 |
| 其它名称： | *IRU1030CM IRU1030-CM IRU1030-CM-ND |
IRU1030
V
ESR
2) With the output capacitance being 1500 m F:
V ESL
V C
D Vc =
D t 3 D I
C
2 3 2.7
= = 3.6mV
1500
LOAD
T
1030plt1-1.0
Where:
D t = 2 m s is the regulator response time
CURRENT
To set the output DC voltage, we need to select R1 and
R2:
LOAD CURRENT RISE TIME
3) Assuming R1 = 121 V , 0.5%:
( V V -1 ) 3 R1 = ( 1.25 -1 ) 3 121 = 24.2 V
Figure 5 - Typical regulator response to
the fast load current step.
An example of a regulator design to meet the Intel
Pentium Pro GTL+ specification is given below.
Assume the specification for the processor as shown in
Table 1:
OUT 1.5
R2 =
REF
Select R2 = 24.3 V , 0.5%
Selecting both R1 and R2 resistors to be 0.5% toler-
ance, results in the least amount of error introduced
by the resistor dividers leaving ≈ ± 1.3% error budget
Type of V OUT
Processor Nominal
Pentium Pro 1.50 V
I MAX
2.7 A
Max Allowed
Output Tolerance
± 150 mV
for the IRU1030 reference which is within the initial
accuracy of the device.
Finally, the input capacitor is selected as follows:
Table 1 - GTL+ Specification for Pentium Pro
4) Assuming that the input voltage can drop 150mV be-
The first step is to select the voltage step allowed in the
output due to the output capacitor’s ESR:
1) Assuming the regulator’s initial accuracy plus the re-
fore the main power supply responds, and that the
main power supply response time is ≈ 50 m s, then
the minimum input capacitance for a 2.7A load step
is given by:
sistor divider tolerance is ≈ ± 30mV ( ± 2% of 1.5V nomi-
nal), then the total step allowed for the ESR and the
ESL, is ? 120 mV.
C IN =
2.7 3 50
0.15
= 900 m F
The ESR should be less than:
Assuming that the ESL drop is ? 10mV, the remain-
ing ESR step will be ? 110mV. Therefore the output
capacitor ESR must be:
ESR =
(V IN - V OUT - D V - V DROP )
D I
ESR [
= 40m V
V DROP L Input voltage drop allowed in step 4
D I L Load current step
110
2.7
The Sanyo MVGX series is a good choice to achieve
both price and performance goals. The 6MV1500GX,
Where:
D V L Maximum regulator dropout voltage
1500 m F, 6.3V has an ESR of less than 36m V typ.
Selecting a single capacitor achieves our design goal.
ESR =
(3.3 - 1.5 - 1.2 - 0.15)
2.7
= 0.16 V
The next step is to calculate the drop due to the ca-
pacitance discharge and make sure that this drop in
voltage is less than the selected ESL drop in the
previous step.
Selecting a single 1500 m F the same type as the output
capacitors exceeds our requirements. However, the same
input capacitor can also support the second regulator
for the other end of termination.
6
www.irf.com
Rev. 1.3
08/20/02
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| IRU1030CMTR | 功能描述:IC REG LDO ADJ 3A TO-263-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:4V 输入电压:最高 16V 电压 - 压降（标准）:0.28V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:5-VFBGA 供应商设备封装:5-uSMD 包装:Digi-Reel® 其它名称:LP2985AIBP-4.0DKR |
| IRU1030CT | 功能描述:IC REG LDO ADJ 3A TO-220 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:4V 输入电压:最高 16V 电压 - 压降（标准）:0.28V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:5-VFBGA 供应商设备封装:5-uSMD 包装:Digi-Reel® 其它名称:LP2985AIBP-4.0DKR |
| IRU1050 | 制造商:IRF 制造商全称:International Rectifier 功能描述:5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
| IRU1050-33 | 制造商:IRF 制造商全称:International Rectifier 功能描述:5A LOW DROPOUT POSITIVE FIXED 3.3V REGULATOR |
| IRU1050-33CD | 功能描述:IC REG LDO 3.3V 5A D-PAK RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:4V 输入电压:最高 16V 电压 - 压降（标准）:0.28V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:5-VFBGA 供应商设备封装:5-uSMD 包装:Digi-Reel® 其它名称:LP2985AIBP-4.0DKR |
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