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参数资料
| 型号： | IRU1160CMTR |
| 厂商： | International Rectifier |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 6A TO-263-5 |
| 标准包装： | 750 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 输入电压： | 最高 7V |
| 电压 - 压降（标准）： | 1.2V @ 6A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 6A |
| 电流 - 限制（最小）： | 6.2A |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | TO-263-5 |
| 包装： | 带卷 (TR) |
IRU1160
APPLICATION INFORMATION
Introduction
The IRU1160 adjustable regulator is a five-terminal de-
V IN
V IN
V OUT
V OUT
vice designed specifically to provide extremely low drop-
IRU1160
out voltages comparable to the PNP type without the
V CTRL
V CTRL
V SENSE
disadvantage of the extra power dissipation due to the
Adj
V REF
R1
base current associated with PNP regulators. This is
done by bringing out the control pin of the regulator that
provides the base current to the power NPN and con-
necting it to a voltage that is grater than the voltage present
I ADJ = 50uA
R2
at the V IN pin. This flexibility makes the IRU1160 ideal
for applications where dual inputs are available such as
a computer mother board with an ATX style power sup-
ply that provides 5V and 3.3V to the board. One such
application is the new graphic chip sets that require any-
where from 2.4V to 2.7V supply such as the Intel I 740
chip set. The IRU1160 can easily be programmed with
the addition of two external resistors to any voltages
within the range of 1.25 to 5.5 V. Another major require-
ment of these graphic chips such as the Intel I 740 is the
need to switch the load current from zero to several amps
in tens of nanoseconds at the processor pins, which
translates to an approximately 300 to 500ns of current
step at the regulator. In addition, the output voltage tol-
erances are also extremely tight and they include the
transient response as part of the specification.
Figure 3 - Typical application of the IRU1160
for programming the output voltage.
The IRU1160 keeps a constant 1.25V between the V SENSE
pin and the V ADJ pin. By placing a resistor R1 across
these two pins and connecting the V SENSE and V OUT pin
together, a constant current flows through R1, adding to
the I ADJ current and into the R2 resistor producing a volt-
age equal to the (1.25/R1) 3 R2 + I ADJ 3 R2. This voltage
is then added to the 1.25V to set the output voltage.
This is summarized in the above equation. Since the
minimum load current requirement of the IRU1160 is
10mA, R1 is typically selected to be a 121 V resistor so
that it automatically satisfies this condition. Notice that
since the I ADJ is typically in the range of 50 m A, it adds a
small error to the output voltage and should be consid-
ered when very precise output voltage setting is required.
The IRU1160 is specifically designed to meet the fast
current transient needs as well as providing an accurate
initial voltage, reducing the overall system cost with the
need for fewer number of output capacitors. Another fea-
ture of the device is its true remote sensing capability
which allows accurate voltage setting at the load rather
than at the device.
Output Voltage Setting
The IRU1160 can be programmed to any voltages in the
range of 1.25V to 5.5V with the addition of R1 and R2
Load Regulation
Since the IRU1160 has separate pins for the output (V OUT )
and the sense (V SENSE ), it is ideal for providing true re-
mote sensing of the output voltage at the load. This
means that the voltage drops due to parasitic resistance
such as PCB traces between the regulator and the load
are compensated for using remote sensing. Figure 4
shows a typical application of the IRU1160 with remote
sensing.
external resistors according to the following formula:
V I N
V IN
V OUT
(
) +I
V OUT = V REF 3 1+
R2
R1
ADJ 3 R2
IRU1160
Where:
V C T R L
V CTRL
Adj
V SENSE
R1
R L
V REF = 1.25V Typically
I ADJ = 50 m A Typically
R 1 & R 2 as shown in Figure 3:
R2
Figure 4 - Schematic showing connection
for best load regulation.
4
www.irf.com
Rev. 1.4
08/20/02
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相关代理商/技术参数 |
参数描述 |
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| IRU1160CP | 制造商:IRF 制造商全称:International Rectifier 功能描述:6A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
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| IRU1175 | 制造商:IRF 制造商全称:International Rectifier 功能描述:7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
| IRU1175CM | 制造商:IRF 制造商全称:International Rectifier 功能描述:7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
| IRU1175CMTR | 功能描述:IC REG LDO ADJ 7.5A TO-263-5 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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