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参数资料
| 型号： | MIC5233-3.0BM5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3V .1A SOT23-5 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3V |
| 输入电压： | 高达 36V |
| 电压 - 压降（标准）： | 0.27V @ 100mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 100mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC5233-3.0BM5TR MIC5233-3.0BM5TR-ND |
Micrel, Inc.
Application Information
Enable/Shutdown
The MIC5233 comes with an active-high enable pin that
MIC5233
To determine the maximum power dissipation of the
package, use the junction-to-ambient thermal resistance
of the device and the following Equation 1:
P D(MAX) = ? ?
?
?
allows the regulator to be disabled. Forcing the enable
pin low disables the regulator and sends it into a “zero”
off-mode-current state. In this state, current consumed
? T J(MAX) ? T A
? θ JA
?
?
Eq. 1
by the regulator goes nearly to zero. Forcing the enable
pin high enables the output voltage.
Input Capacitor
The MIC5233 has high input voltage capability up to
36V. The input capacitor must be rated to sustain
voltages that may be used on the input. An input
T J(MAX) is the maximum junction temperature of the die,
125°C, and TA is the ambient operating temperature. θ JA
is layout dependent; Table 1 shows examples of the
junction-to-ambient thermal resistance for the MIC5233:
capacitor may be required when the device is not near
the source power supply or when supplied by a battery.
Small, surface mount, ceramic capacitors can be used
for bypassing. A larger value may be required if the
source supply has high ripple.
Package
SOT-23-5
SOT223
θ JA Recommended
Minimum Footprint
235 ° C/W
50 ° C/W
Output Capacitor
The MIC5233 requires an output capacitor for stability.
The design requires 2.2μF or greater on the output to
maintain stability. The design is optimized for use with
low-ESR ceramic chip capacitors. High-ESR capacitors
Table 1. SOT23-5 and SOT-223 Thermal Resistance
The actual power dissipation of the regulator circuit can
be determined using Equation 2:
may cause high-frequency oscillation. The maximum
recommended ESR is 3 Ω . The output capacitor can be
increased without limit. Larger valued capacitors help to
P D = (V IN ? V OUT )I OUT + V IN × I GND
Eq. 2
improve transient response.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
50% and 60% respectively over their operating
Substituting P D(MAX) for P D and solving for the operating
conditions that are critical to the application will give the
maximum operating conditions for the regulator circuit.
For example, when operating the MIC5233-3.0YM5 at
50°C with a minimum footprint layout, the maximum
input voltage for a set output current can be determined
as follows:
P D(MAX) = ?
? 125 ° C ? 50 ° C ?
235 ° C/W
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
? ?
where P D(MAX) = 319mW.
?
Eq. 3
No-Load Stability
The MIC5233 will remain stable and in regulation with no
load unlike many other voltage regulators. This is
especially important in CMOS RAM keep-alive
applications.
Thermal Consideration
The MIC5233 is designed to provide 100mA of
continuous current in a very-small package. Maximum
power dissipation can be calculated based on the output
current and the voltage drop across the part.
The junction-to-ambient ( θ JA ) thermal resistance for the
minimum footprint is 235°C/W, from Table 1. It is
important that the maximum power dissipation not be
exceeded to ensure proper operation. Since the
MIC5233 was designed to operate with high input
voltages, careful consideration must be given so as not
to overheat the device. With very high input-to-output
voltage differentials, the output current is limited by the
total power dissipation.
July 2012
9
M9999-071212-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5233-5.0BM5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Input Voltage, Low IQ ?Cap LDO Regulator |
| MIC5233-5.0BM5 TR | 功能描述:IC REG LDO 5V .1A SOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:500 系列:- 稳压器拓扑结构:正，固定式 输出电压:12V 输入电压:14.5 V ~ 35 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:500mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:TO-205AD，TO-39-3 金属罐 供应商设备封装:TO-39 包装:散装 其它名称:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5233-5.0YM5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Input Voltage Low IQ ??Cap LDO Regulator |
| MIC5233-5.0YM5 TR | 功能描述:低压差稳压器 - LDO High Vin, Low Iq Regulator(Lead Free) 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 |
| MIC5233-5.0YM5TR | 制造商:Micrel 功能描述:LDO Regulator Pos 5V 0.1A |
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