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参数资料
| 型号： | MIC5319YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 6MLF |
| 标准包装： | 1 |
| 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： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.2V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 600mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-VQFN 裸露焊盘，6-MLF? |
| 供应商设备封装： | 6-MLF?（2x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1103 (CN2011-ZH PDF) |
| 其它名称： | 576-1299-6 |
Micrel, Inc.
Because this device is CMOS and the ground current is
typically <100μA over the load range, the power
dissipation contributed by the ground current is <1% and
can be ignored for this calculation:
MIC5319
Substituting 0.25W for P D (max) and solving for the
ambient operating temperature will give the maximum
operating conditions for the regulator circuit. The
maximum power dissipation must not be exceeded for
proper operation.
P D = (3.3V ? 2.8V) × 500mA
P D = 0.25W
0.25W =
125 ° C ? T A
93 ° C/W
T A = 101.75 ° C
? T J (max) ? T A ?
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
P D (max) = ? ?
? θ JA ?
T J (max) = 125°C, the maximum junction temperature of
the die. θ JA thermal resistance = 93°C/W.
Table 1 shows junction-to-ambient thermal resistance for
the MIC5319 in the 2mm x 2mm MLF ? package.
Therefore, a 2.8V application at 500mA of output current
can accept an ambient operating temperature of
101.75°C in a 2mm x 2mm MLF ? package. For a full
discussion of heat sinking and thermal effects on voltage
regulators, refer to the “Regulator Thermals” section of
Micrel’s Designing with Low-Dropout Voltage Regulators
handbook. This information can be found on Micrel's
website at: www.micrel.com/_PDF/other/LDOBk_ds.pdf
Package
2mm × 2mm MLF ?
Thin SOT-23-5
θ JA Recommended
Minimum Footprint
93 ° C/W
235 ° C/W
θ JC
45 ° C/W
Table 1. Thermal Resistance
July 2012
10
M9999-071812
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