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参数资料
| 型号： | NCV8537MN180GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION NCV8537 1.8V |
| 设计资源： | NCV8537MN180GEVB Schematic NCV8537MN180GEVB BOM NCV8537MN180GEVB Gerber Files |
| 标准包装： | 1 |
| 每 IC 通道数： | 1 - 单 |
| 输出电压： | 1.8V |
| 电流 - 输出： | 500mA |
| 输入电压： | 2.9 V ~ 12 V |
| 稳压器类型： | 正，固定式 |
| 工作温度： | -40°C ~ 125°C |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCV8537 |
| 其它名称： | NCV8537MN180GEVBOS |
NCV8537
APPLICATIONS INFORMATION
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Reverse Bias Protection
Reverse bias is a condition caused when the input voltage
goes to zero, but the output voltage is kept high either by a
large output capacitor or another source in the application
which feeds the output pin.
Normally in a bipolar LDO all the current will flow from
the output pin to input pin through the PN junction with
limited current capability and with the potential to destroy
the IC.
Due to an improved architecture, the NCV8537 can
withstand up to 7.0 V on the output pin with virtually no
current flowing from output pin to input pin, and only
negligible amount of current (tens of m A) flowing from the
output pin to ground for infinite duration.
Input Capacitor
An input capacitor of at least 1.0 m F, any type, 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
temperature is exceeded. This feature provides protection
from a catastrophic device failure due to accidental
overheating. This protection feature is not intended to be used
as a substitute to heat sinking. The maximum power that can
be dissipated, can be calculated with the equation below:
(eq. 1)
R q JA
For improved thermal performance, contact the factory
for the DFN package option. The DFN package includes an
exposed metal pad that is specifically designed to reduce the
junction to air thermal resistance, R q JA .
Adjustable Operation
The output voltage can be set by using a resistor divider
as shown in Figure 2 with a range of 1.25 to 10 V. The
appropriate resistor divider can be found by solving the
equation below. The recommended current through the
resistor divider is from 10 m A to 100 m A. This can be
accomplished by selecting resistors in the k W range. As
result, the I adj * R2 becomes negligible in the equation and
can be ignored.
track length directly across the regular ’s input terminals.
V out + 1.25 * (1 ) R3 R2) ) I adj * R2
(eq. 2)
Output Capacitor
The NCV8537 remains stable with any type of capacitor
as long as it fulfills its 1.0 m F requirement. There are no
constraints on the minimum ESR and it will remain stable up
to an ESR of 5.0 W . Larger capacitor values will improve the
noise rejection and load transient response.
Noise Reduction Pin
Output noise can be greatly reduced by connecting a 10 nF
capacitor (C nr ) between the noise reduction pin and ground
(see Figure 1). In applications where very low noise is not
required, the noise reduction pin can be left unconnected.
Dropout Voltage
The voltage dropout is measured at 97% of the nominal
output voltage.
Power Good Operation
The Power Good pin on the NCV8537 will produce a
logic Low when it drops below the nominal output voltage.
Refer to the electrical characteristics for the threshold values
at which point the Power Good goes Low. When the
NCV8537 is above the nominal output voltage, the
Power Good will remain at logic High.
The external pullup resistor needs to be connected
between V in and the Power Good pin. A resistor of
approximately 100 k W is recommended to minimize the
current consumption. No pullup resistor is required if the
Power Good output is not being used. The Power Good does
not function during thermal shutdown and when the part is
disabled.
Thermal Considerations
Internal thermal limiting circuitry is provided to protect the
integrated circuit in the event that the maximum junction
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8537MN180R2G | 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 |
| NCV8537MN250GEVB | 功能描述:电源管理IC开发工具 NCV8537 2.5V 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 |
| NCV8537MN250R2G | 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 |
| NCV8537MN330GEVB | 功能描述:电源管理IC开发工具 NCV8537 3.3V 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 |
| NCV8537MN330R2G | 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 |
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