参数资料
| 型号： | LT1761ES5-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/22页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2V .1A TSOT23-5 |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2V |
| 输入电压： | 最高 20V |
| 电压 - 压降（标准）： | 0.3V @ 100mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 100mA |
| 电流 - 限制（最小）： | 110mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 带卷 (TR) |
LT1761 Series
APPLICATIONS INFORMATION
Voltage and temperature coef?cients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or micro-
phone works. For a ceramic capacitor the stress can be
induced by vibrations in the system or thermal transients.
The resulting voltages produced can cause appreciable
amounts of noise, especially when a ceramic capacitor is
used for noise bypassing. A ceramic capacitor produced
Figure 5’s trace in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
V OUT
500μV/DIV
The ground pin current can be found by examining the
GND Pin Current curves in the Typical Performance Char-
acteristics section. Power dissipation will be equal to the
sum of the two components listed above.
The LT1761 series regulators have internal thermal limiting
designed to protect the device during overload conditions.
For continuous normal conditions, the maximum junction
temperature rating of 125°C must not be exceeded. It is
important to give careful consideration to all sources of
thermal resistance from junction to ambient. Additional
heat sources mounted nearby must also be considered.
For surface mount devices, heat sinking is accomplished
by using the heat spreading capabilities of the PC board
and its copper traces. Copper board stiffeners and plated
through-holes can also be used to spread the heat gener-
ated by power devices.
The following table lists thermal resistance for several
different board sizes and copper areas. All measurements
were taken in still air on 3/32" FR-4 board with one ounce
copper.
Table 1. Measured Thermal Resistance
LT1761-5
C OUT = 10μF
C BYP = 0.01μF
I LOAD = 100mA
100ms/DIV
1761 F05
COPPER AREA
TOPSIDE*
BACKSIDE
2500mm 2
2500mm 2
THERMAL RESISTANCE
BOARD AREA (JUNCTION-TO-AMBIENT)
2500mm 2 125°C/W
Figure 5. Noise Resulting from Tapping on a Ceramic Capacitor
Thermal Considerations
The power handling capability of the device will be limited
1000mm 2
225mm 2
100mm 2
50mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
125°C/W
130°C/W
135°C/W
150°C/W
by the maximum rated junction temperature (125°C). The
power dissipated by the device will be made up of two
components:
1. Output current multiplied by the input/output voltage
differential: (I OUT )(V IN – V OUT ), and
*Device is mounted on topside.
Calculating Junction Temperature
Example: Given an output voltage of 3.3V, an input voltage
range of 4V to 6V, an output current range of 0mA to 50mA
2. GND pin current multiplied by the input voltage:
(I GND )(V IN ).
1761sff
17
相关PDF资料 |
PDF描述 |
|---|---|
| LT1761ES5-2.5#TRPBF | IC REG LDO 2.5V .1A TSOT23-5 |
| AP131-28WL-7 | IC REG LDO 2.8V .3A SOT-25 |
| LT1761ES5-BYP#TRPBF | IC REG LDO ADJ .1A TSOT23-5 |
| LT1761ES5-3.3#TRPBF | IC REG LDO 3.3V .1A TSOT23-5 |
| AP131-30WL-7 | IC REG LDO 3V .3A SOT-25 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1761ES5-3 | 制造商:Linear Technology 功能描述:LDO Regulator Pos 3V 0.1A 5-Pin TSOT-23 |
| LT1761ES5-3#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 3V 0.1A 5-Pin TSOT-23 |
| LT1761ES5-3#TR | 功能描述:IC REG LDO 3V .1A TSOT23-5 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:2.7V 输入电压:最高 5.5V 电压 - 压降（标准）:0.21V @ 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:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:剪切带 (CT) 产品目录页面:1100 (CN2011-ZH PDF) 其它名称:576-1852-1 |
| LT1761ES5-3#TRM | 功能描述:IC REG LDO 3V .1A TSOT23-5 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:2.7V 输入电压:最高 5.5V 电压 - 压降（标准）:0.21V @ 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:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:剪切带 (CT) 产品目录页面:1100 (CN2011-ZH PDF) 其它名称:576-1852-1 |
| LT1761ES5-3#TRMPBF | 功能描述:IC REG LDO 3V .1A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:75 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 37 V 输入电压:4.2 V ~ 40 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:500mA 电流 - 限制（最小）:500mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-3，DPak（2 引线+接片），SC-63 供应商设备封装:TO-252-3 包装:管件 产品目录页面:1286 (CN2011-ZH PDF) 其它名称:*LM317AMDT/NOPBLM317AMDT |
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