参数资料
| 型号： | SC560HULTRT |
| 厂商： | Semtech |
| 文件页数： | 12/15页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .3A 8-MLPQ |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.1V @ 200mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 350mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-UFQFN |
| 供应商设备封装： | 8-MLPQ-UT（1.5x1.5） |
| 包装： | 标准包装 |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC560HULDKR |
SC560
Applications Information (continued)
Thermal Considerations
Although each of the two LDOs in the SC560 can provide
300mA of output current, the maximum power dissipation
in the device is restricted by the miniature package size.
The graphs in Figure 3 and Figure 4 can be used as a
guideline to determine whether the input voltage, output
voltages, output currents, and ambient temperature of the
system result in power dissipation within the operating
limits are met or if further thermal relief is required.
0.7
0.6
The following procedure can be followed to determine if
the thermal design of the system is adequate. The junction
temperature of the SC560 can be determined in known
operating conditions using the following equation:
T J = T A +(P D x θ JA )
where
T J = Junction Temperature (°C)
T A = Ambient Temperature (°C)
P D = Power Dissipation (W)
θ JA = Thermal Resistance Junction to Ambient (°C/W)
0.5
Example
0.4
0.3
Vo=1.5V
Vo=3.3V
An SC560D is used to provide outputs of 2.8V, 150mA from
LDOA and 1.8V, 200mA from LDOB. The input voltage is
4.2V, and the ambient temperature of the system is 40°C.
0.2
T A =+25 ° C, P D(MAX) = 0.8W
0.1
0
______
- - - - T A =+85 ° C, P D(MAX) = 0.41W
P D = 0.15(4.2 – 2.8) + 0.2(4.2 – 1.8)
= 0.69W
2.5
3
3.5
4
4.5
5
5.5
6
1.6
1.4
1.2
Input Voltage (V)
Figure 3 — Safe Operating Limit
and
T J = 40 + (0.69 x 157) = 148.3°C
Figures 3 and 4 show that the junction temperature
would be within the maximum specification of 150°C
for this power dissipation. This means that operation of
1
0.8
0.6
T J (Max)=150°C
the SC560 under these conditions is within the specified
limits and the device would not require further thermal
relief measures.
T J (Max)=125°C
0.4
0.2
0
-40
-20
0
20 40
60
80
100
Ambient Temperature ( o C)
Figure 4 — Maximum P D vs. T A
12
相关PDF资料 |
PDF描述 |
|---|---|
| ABE30DHHD | CONN EDGECARD 60POS 1MM DIP SLD |
| ABE30DHFN | CONN EDGECARD 60POS 1MM SMD |
| ABE30DHFD | CONN EDGECARD 60POS 1MM SMD |
| NCP512SQ22T2G | IC REG LDO 2.2V .2A SC88A |
| FMC07DRES-S13 | CONN EDGECARD 14POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC560LULTRT | 制造商:Semtech Corporation 功能描述: |
| SC560XEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual Output Low Noise LDO Linear Regulator |
| SC560XULTRT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual Output Low Noise LDO Linear Regulator |
| SC561 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual Output Low Noise LDO Linear Regulator |
| SC56-11 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:14MM SINGLE DIGIT NUMERIC DISPLAYS |
发布紧急采购，3分钟左右您将得到回复。