参数资料
| 型号： | NCP508SQ30T1G |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/15页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3V 50MA SC-88A |
| 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： | 最高 7V |
| 电压 - 压降（标准）： | 0.18V @ 50mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 50mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-88A |
| 包装： | 带卷 (TR) |
NCP508
DEFINITIONS
Load Regulation
The change in output voltage for a change in output
current at a constant temperature.
Dropout Voltage
The input/output differential at which the regulator output
no longer maintains regulation against further reductions in
input voltage. Measured when the output drops 100 mV
below its nominal. The junction temperature, load current,
and minimum input supply requirements affect the dropout
level.
Maximum Power Dissipation
The maximum total dissipation for which the regulator
will operate within its specifications.
Quiescent Current
The quiescent current is the current which flows through
the ground when the LDO operates without a load on its
output: internal IC operation, bias, etc. When the LDO
becomes loaded, this term is called the Ground current. It is
actually the difference between the input current (measured
through the LDO input pin) and the output current.
Line Regulation
The change in output voltage for a change in input voltage.
The measurement is made under conditions of low
dissipation or by using pulse technique such that the average
chip temperature is not significantly affected.
Line Transient Response
Typical over and undershoot response when input voltage
is excited with a given slope.
Thermal Protection
Internal thermal shutdown circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated at typically 125 ° C,
the regulator turns off. This feature is provided to prevent
failures from accidental overheating.
Maximum Package Power Dissipation
The maximum power package dissipation is the power
dissipation level at which the junction temperature reaches
its maximum operating value, i.e. 150 ° C. Depending on the
ambient power dissipation and thus the maximum available
output current.
APPLICATIONS INFORMATION
P D +
Typical application circuit for the NCP508 series is shown
in Figure 1.
Input Decoupling (C1)
An input capacitor of at least 1.0 m F,(ceramic or tantalum)
is recommended to improve the transient response of the
regulator and/or if the regulator is located more than a few
inches from the power source. It will also reduce the circuit’s
sensitivity to the input line impedance at high frequencies.
The capacitor should be mounted with the shortest possible
track length directly across the regular ’s input terminals.
Higher values and lower ESR will improve the overall line
transient response.
Output Decoupling (C2)
The NCP508 is a stable regulator and does not require a
minimum output current. Capacitors exhibiting ESRs
ranging from a few m W up to 3 W can safely be used. The
minimum decoupling value is 1.0 m F and can be augmented
to fulfill stringent load transient requirements. The regulator
accepts ceramic chip capacitors as well as tantalum devices.
Larger values improve noise rejection and load regulation
transient response.
Enable Operation
The enable pin will turn on or off the regulator. The limits
of threshold are covered in the electrical specification
section of this datasheet. If the enable is not used then the pin
should be connected to V in .
Hints
Please be sure the V in and GND lines are sufficiently wide.
When the impedance of these lines is high, there is a chance
to pick up noise or cause the regulator to malfunction.
Set external components, especially the output capacitor,
as close as possible to the circuit, and make leads as short as
possible.
Thermal Considerations
Internal thermal limiting circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded.
The maximum power dissipation supported by the device
is dependent upon board design and layout. Mounting pad
configuration on the PCB, the board material and also the
ambient temperature effect the rate of temperature rise for
the part. This is stating that when the NCP508 has good
thermal conductivity through the PCB, the junction
temperature will be relatively low with high power
dissipation applications.
The maximum dissipation the package can handle is given
by:
T J ( max ) * T A
(eq. 1)
R q JA
where:
? T J{max) is the maximum allowable junction temperature
of the die, which is 150 ° C
? T A is the ambient operating temperature
? R q ja is dependent on the surrounding PCB layout
http://onsemi.com
12
相关PDF资料 |
PDF描述 |
|---|---|
| NCP699SN14T1G | IC REG LDO 1.4V 240MA 5TSOP |
| NCP699SN31T1G | IC REG LDO 3.1V 240MA 5TSOP |
| HMC30DRAN-S734 | CONN EDGECARD 60POS .100 R/A PCB |
| LFXP20E-3FN484C | IC FPGA 19.7KLUTS 484FPBGA |
| MAX9951DCCB+D | IC PPMU DUAL SPI 64TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP508SQ33T1G | 功能描述:低压差稳压器 - LDO 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 |
| NCP508SQ33T1GEVB | 功能描述:电源管理IC开发工具 NCP507 3.3 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP5104 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Voltage, Half Bridge Driver |
| NCP5104BA36WGEVB | 功能描述:电源管理IC开发工具 NCP5104 36W BALLAST EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP5104DR2G | 功能描述:功率驱动器IC NCP5104 RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。