参数资料
| 型号： | LT3080IST#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/28页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.1A SOT223-3 |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调至 36V |
| 输入电压： | 1.2 V ~ 36 V |
| 电压 - 压降（标准）： | 1.35V @ 1.1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.1A |
| 电流 - 限制（最小）： | 1.1A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223-3 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LT3080
APPLICATIONS INFORMATION
(5 milliohms for the two devices in parallel) only adds about
10 millivolts of output regulation drop at an output of 2A.
Even with an output voltage as low as 1V, this only adds
1% to the regulation. Of course, more than two LT3080’s
can be paralleled for even higher output current. They are
spread out on the PC board, spreading the heat. Input
resistors can further spread the heat if the input-to-output
difference is high.
Thermal Performance
In this example, two LT3080 3mm × 3mm DFN devices
are mounted on a 1oz copper 4-layer PC board. They are
placed approximately 1.5 inches apart and the board is
mounted vertically for convection cooling. Two tests were
set up to measure the cooling performance and current
sharing of these devices.
The first test was done with approximately 0.7V input-
to-output and 1A per device. This gave a 700 milliwatt
dissipation in each device and a 2A output current. The
temperature rise above ambient is approximately 28°C
and both devices were within plus or minus 1°C. Both the
thermal and electrical sharing of these devices is excel-
lent. The thermograph in Figure 5 shows the temperature
distribution between these devices and the PC board
reaches ambient temperature within about a half an inch
from the devices.
The power is then increased with 1.7V across each device.
This gives 1.7 watts dissipation in each device and a device
Figure 5. Temperature Rise at 700mW Dissipation
temperature of about 90°C, about 65°C above ambient
as shown in Figure 6. Again, the temperature matching
between the devices is within 2°C, showing excellent
tracking between the devices. The board temperature has
reached approximately 40°C within about 0.75 inches of
each device.
While 90°C is an acceptable operating temperature for these
devices, this is in 25°C ambient. For higher ambients, the
temperature must be controlled to prevent device tempera-
ture from exceeding 125°C. A 3-meter-per-second airflow
across the devices will decrease the device temperature
about 20°C providing a margin for higher operating ambi-
ent temperatures.
Both at low power and relatively high power levels de-
vices can be paralleled for higher output current. Current
sharing and thermal sharing is excellent, showing that
acceptable operation can be had while keeping the peak
temperatures below excessive operating temperatures on
a board. This technique allows higher operating current
linear regulation to be used in systems where it could
never be used before.
Quieting the Noise
The LT3080 offers numerous advantages when it comes
to dealing with noise. There are several sources of noise
in a linear regulator. The most critical noise source for any
LDO is the reference; from there, the noise contribution
Figure 6. Temperature Rise at 1.7W Dissipation
3080fc
12
相关PDF资料 |
PDF描述 |
|---|---|
| MIC69301-1.2WR TR | IC REG LDO 1.2V 3A SPAK |
| LT1175CN8 | IC REG LDO NEG ADJ .5A 8-DIP |
| HBC60DRTS | CONN EDGECARD 120PS DIP .100 SLD |
| ESC43DRYS | CONN EDGECARD 86POS DIP .100 SLD |
| ASC05DTEN | CONN EDGECARD 10POS .100 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3080IT#PBF | 功能描述:IC REG LDO ADJ 1.1A TO-220-5 RoHS:是 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:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3080IT#TRPBF | 功能描述:IC REG LDO ADJ 1.1A TO-220-5 RoHS:是 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 |
| LT3081 | 制造商:LINEAR_DIMENSIONS 制造商全称:LINEAR_DIMENSIONS 功能描述:1.5A Single Resistor Rugged Linear Regulator with Monitors |
| LT-30814 | 制造商:Datak Corporation 功能描述: |
| LT3081EDF#PBF | 制造商:Linear Technology 功能描述:IC REG LDO ADJ 1.5A 12DFN 制造商:Linear Technology 功能描述:IC LDO LINEAR REG RUGGED 1.5 制造商:Linear Technology 功能描述:IC, LDO LINEAR REG, RUGGED 1.5A, 12DFN 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-34.5V, 1.5A, DFN-12, Input Voltage Min:1.2V, Input Voltage Max:36V, 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-34.5V, 1.5A, DFN-12, Input Voltage Min:1.2V, Input Voltage Max:36V, Output Voltage Min:0V, Output Voltage Max:34.5V, Output Current:1.5A, Dropout Voltage Vdo:1.23V, No. of Pins:12, Operating Temperature Min:-40C , RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。