参数资料
| 型号： | MIC5304-XDYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.85V/3.15V 6-TMLF |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.85V，3.15V |
| 输入电压： | 2.3 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.085V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 275mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UFDFN 裸露焊盘，6-TMLF? |
| 供应商设备封装： | 6-TMLF?（1.6x1.6） |
| 包装： | 标准包装 |
| 产品目录页面： | 1101 (CN2011-ZH PDF) |
| 其它名称： | 576-3127-6 |
P D(MAX) = ? ?
? T J(MAX) ? T A ?
?
Micrel, Inc.
Application Information
The MIC5304 is a low quiescent current voltage selectable
LDO. The regulator is capable of sourcing 150mA of output
current with a low quiescent current of 24μA. A logic input
signal selects the output between two preset voltages. The
MIC5304 regulator is fully protected from damage due to
fault conditions, offering linear current limiting and thermal
shutdown.
Input Capacitor
The MIC5304 is a high-performance, high bandwidth device.
Therefore, it requires a well bypassed input supply for
optimal performance. An input capacitor of 1μF is required
from the input to ground to provide stability. Low-ESR
ceramic capacitors provide optimal performance at a
minimum of space. Additional high-frequency capacitors,
such as small-valued NPO dielectric-type capacitors, help
filter out high-frequency noise and are good practice in any
RF-based circuit. X5R or X7R dielectrics are recommended
for the input capacitor. Y5V dielectrics lose most of their
capacitance over temperature and are therefore, not
recommended.
Output Capacitor
The MIC5304 requires an output capacitor of 1μF or greater
to maintain stability. The design is optimized for use with low-
ESR ceramic chip capacitors. High ESR capacitors may
cause high frequency oscillation. The output capacitor can
be increased, but performance has been optimized for a 1μF
ceramic output capacitor and does not improve significantly
with larger capacitance.
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 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.
Enable/Shutdown
The MIC5304 is provided with an active-high enable pin that
allows the regulator to be enabled. Forcing the enable pin
low disables the regulator and sends it into a “zero” off-
mode-current state. In this state, current consumed by the
regulator goes nearly to zero. The active-high enable pin
uses CMOS technology and the enable pin cannot be left
floating; a floating enable pin may cause an indeterminate
state on the output.
Voltage Select
The voltage select pin is used to select the output voltage
MIC5304
between two voltages. A logic high signal sets the output to
the higher voltage; while a logic low signal selects the lower
output voltage. The voltage select pin cannot be left floating;
a floating pin may cause an indeterminate state on the
output.
Thermal Considerations
The MIC5304 is designed to provide 150mA of continuous
current in a very small package. Maximum ambient
operating temperature can be calculated based on the
output current and the voltage drop across the part. For
example if the input voltage is 3.6V, the output voltage is
3.15V with V SEL set high and 1.85V with V SEL low, and the
output current = 150mA. The lower output voltage should be
used for power dissipation calculations as this is the worst
case situation. The actual power dissipation of the regulator
circuit can be determined using the equation:
P D = (V IN – V OUT ) I OUT + V IN I GND
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.
P D = (3.6V –1.85V) × 150mA
P D = 0.2625W
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:
?
? θ JA ?
T J(max) = 125°C, and the maximum junction temperature of
the die, θ JA , thermal resistance = 92°C/W.
Substituting P D for P D(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-ambient
thermal resistance for the minimum footprint is 92°C/W.
The maximum power dissipation must not be exceeded for
proper operation.
For example, when operating the MIC5304-XDYMT at an
input voltage of 3.6V and 150mA load with a minimum
footprint layout, the maximum ambient operating
temperature T A can be determined as follows:
0.2625W = (125°C – T A )/(92°C/W)
T A = 100°C
Therefore, a 3.15/1.85V application with a 150mA output
current can accept an ambient operating temperature of
100°C in a 1.6mm x 1.6mm 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: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
November 2008
9
M9999-111908-A
相关PDF资料 |
PDF描述 |
|---|---|
| MIC5305-2.5YD5 TR | IC REG LDO 2.5V .15A TSOT23-5 |
| MIC5306-3.0YD5 TR | IC REG LDO 3V .15A TSOT23-5 |
| MIC5307-3.0YD5 TR | IC REG LDO 3V .3A TSOT23-5 |
| MIC5308-1.2YD6 TR | IC REG LDO 1.2V .15A TSOT23-6 |
| MIC5309-1.2YMT TR | IC REG LDO 1.2V .3A 6-TMLF |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5304-XGHYMT TR | 功能描述:低压差稳压器 - LDO Single 150mA Low Iq LDO with Vselect in 1.6mm x 1.6mm TMLF 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 |
| MIC5304-XGHYMT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 1 Output 1.88V, 3.15V 150mA 6-TMLF? (1.6x1.6) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 稳压器拓扑:正，固定式 电压 - 输出:1.88V，3.15V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.085V @ 150mA 稳压器数:1 电压 - 输入:2.3 V ~ 5.5 V 电流 - 限制（最小值）:275mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商器件封装:6-TMLF?（1.6x1.6） 标准包装:1 |
| MIC5305-1.5BD5 TR | 功能描述:IC REG LDO 1.5V .15A TSOT23-5 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 |
| MIC5305-1.5BML TR | 功能描述:IC REG LDO 1.5V .15A 6-MLF 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 |
| MIC5305-1.5YD5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。