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| 型号： | MIC2954-08YM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V/ADJ .25A 8SOIC |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 5V，1.24 V ~ 29 V |
| 输入电压： | 2 V ~ 30 V |
| 电压 - 压降（标准）： | 0.375V @ 250mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 250mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 标准包装 |
| 产品目录页面： | 1096 (CN2011-ZH PDF) |
| 其它名称： | 576-1156-6 |
Micrel, Inc.
MIC2954
Thermal Calculations
Layout Considerations
The MIC2954-07BM/-08BM (8-pin surface-mount pack-
age) has the following thermal characteristics when
mounted on a single layer copper-clad printed circuit
board.
PC Board Dielectric Material
θ JA
FR4 160°C/W
* See Application Information
Figure 1. /Error Output Timing
or about 0.01μF. When doing this, the output capacitor
must be increased to 3.3μF to maintain stability. These
changes reduce the output noise from 430μV to
100μV rms for a100kHz bandwidth at 5V output. With the
bypass capacitor added, noise no longer scales with
output voltage so that improvements are more dramatic
at higher output voltages.
Automotive Applications
The MIC2954 is ideally suited for automotive applica-
tions for a variety of reasons. It will operate over a wide
range of input voltages with very low dropout voltages
(40mV at light loads), and very low quiescent currents
(75μA typical). These features are necessary for use in
battery powered systems, such as automobiles. It is a
“bulletproof” device with the ability to survive both
reverse battery (negative transients up to 20V below
ground), and load dump (positive transients up to 60V)
conditions. A wide operating temperature range with low
temperature coefficients is yet another reason to use
these versatile regulators in automotive designs.
Ceramic 120°C/W
Multilayer boards having a ground plane, wide traces
near the pads, and large supply bus lines provide better
thermal conductivity.
Our calculations will use the “worst case” value of
160°C/W, which assumes no ground plane, minimum
trace widths, and a FR4 material board.
Pad Layout (minimum recommended geometry)
Nominal Power Dissipation and Die Temperature
The MIC2954-07BM/-08BM at a 55°C ambient temp-
erature will operate reliably at up to 440mW power
dissipation when mounted in the “worst case” manner
described above. This power level is equivalent to a die
temperature of 125°C, the recommended maximum
temperature for nonmilitary grade silicon integrated
circuits.
September 2007
11
M9999-090607
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相关代理商/技术参数 |
参数描述 |
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| MIC29710-3.3BT | 功能描述:IC REG LDO 7.5A 3.3V TO220-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| MIC29710-3.3WT | 功能描述:低压差稳压器 - LDO 7.5A LDO Fixed Voltage (ROHS Compliant ) RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC29710-5.0BT | 功能描述:IC REG LDO 7.5A 5V TO220-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| MIC29710-5.0WT | 功能描述:低压差稳压器 - LDO 7.5A LDO Fixed Voltage (ROHS Compliant ) RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC29712BT | 功能描述:IC REG LDO 7.5A ADJ TO-220-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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