参数资料
| 型号： | MIC5234YME |
| 厂商： | Micrel Inc |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .15A 8SOIC |
| 标准包装： | 95 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 20 V |
| 输入电压： | 2.3 V ~ 30 V |
| 电压 - 压降（标准）： | 0.32V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 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 Width）裸露焊盘 |
| 供应商设备封装： | 8-SOIC-EP |
| 包装： | 管件 |
Micrel, Inc.
Application Information
The MIC5234 is a μcap low dropout linear regulator
which provides wide input voltage range, reversed-
battery protection, reduced quiescent current and small
package. When disabled, the quiescent current is
reduced to 0.1 μ A.
Enable
A low on the enable pin disables the part, forcing the
quiescent current to less than 0.1 μ A. Thermal shutdown
is not functional while the device is disabled. The
maximum enable bias current is 2 μ A for a 2.0V input. An
open collector pull-up resistor tied to the input voltage
should be set low enough to maintain 2V on the enable
input. Figure 1 shows an open collector output driving
the enable pin through a 200k pull-up resistor tied to the
input voltage. In order to avoid output oscillations, slow
transitions from low to high should be avoided.
Figure 1. Remote Enable
Input Capacitor
An input 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. Larger values may be required if the
source supply has high ripple.
Output Capacitor
The MIC5234 has been designed to minimize the effect
of the output capacitor ESR on the closed loop stability.
As a result, ceramic or film capacitors can be used at the
output. Figure 2 displays a range of ESR values for a
10 μ F capacitor. A 10 μ F capacitor with an ESR less than
3.4 ? is sufficient for stability over the entire input voltage
range. Stability can also be maintained throughout the
specified load and line conditions with 2.2 μ F film or
ceramic capacitors.
MIC5234
Figure 2. Output Capacitor ESR
Reverse Current Protection
The MIC5234 is designed to limit the reverse current
flow from output to input in the event that the MIC5234
output has been tied to the output of another power
supply. Refer to the Typical Characteristics to see the
graphs detailing the reverse current flow with the input
grounded and open.
Thermal Shutdown
The MIC5234 has integrated thermal protection. This
feature is only for protection purposes. The device
should never be intentionally operated near this
temperature as this may have detrimental effects on the
life of the device. The thermal shutdown may become
inactive while the enable input is transitioning a high to a
low. When disabling the device via the enable pin,
transition from a high to low quickly. This will insure that
the output remains disabled in the event of a thermal
shutdown.
ePad SOIC-8 Thermal Characteristics
The MIC5234 is a high input voltage device intended to
provide 150mA of continuous output current in one a
small profile package. The ePad SOIC-8 allows the
device to dissipate approximately 50% more power than
the SOIC-8 package.
The benefit of the MIC5234 ePad SOIC-8 package is an
improvement to less than half the thermal resistance
over the standard SO-8 packing. Lower thermal
resistance means more output current or higher input
voltage for a given package size. Lower thermal
resistance is achieved by joining the die with the die
attach paddle to create a single piece electrical and
thermal conductor. This concept has been used by
MOSFET manufacturers for years, proving very reliable
and cost effective for the user. Thermal resistance
consists of two main elements, θ JC (junction-to-case
thermal resistance) and θ CA (case-to-ambient thermal
resistance). See Figure 3. θ JC is the resistance from the
die to the case (ePad) of the package. θ CA is the
September 2011
9
M9999-092711-B
相关PDF资料 |
PDF描述 |
|---|---|
| MIC5235-3.0YM5 TR | IC REG LDO 3V .15A SOT23-5 |
| MIC5236-2.5YMM | IC REG LDO 2.5V .15A 8-MSOP |
| MIC5237-5.0YU TR | IC REG LDO 5V .5A TO-263 |
| MIC5238-1.0YM5 TR | IC REG LDO 1V .15A SOT23-5 |
| MIC5239-1.8YM | IC REG LDO 1.8V .5A 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5234YME TR | 功能描述:低压差稳压器 - LDO Low Quiescent Current uCap LDO 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 |
| MIC5235 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Ultra-Low Quiescent Current, 150mA UCap LDO Regulator |
| MIC5235_09 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Ultra-Low Quiescent Current, 150mA μCap LDO Regulator |
| MIC5235-1.5BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC5235-1.5BM5 TR | 功能描述:IC REG LDO 1.5V .15A 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 |
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