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参数资料
| 型号： | NCV8508D2T50G |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V D2PAK-7 |
| 产品变化通告： | Product Discontinuance Notice 25/Mar/2011 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 45 V |
| 电压 - 压降（标准）： | 0.45V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 限制（最小）： | 250mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-8，D²Pak（7 引线+接片），TO-263CA |
| 供应商设备封装： | D2PAK-7 |
| 包装： | 管件 |
NCV8508
DETAILED OPERATING DESCRIPTION
The NCV8508 is a precision micropower voltage
regulator with very low quiescent current (100 m A typical at
250 mA load). A typical dropout voltage is 450 mV at
150 mA. Microprocessor control logic includes Watchdog,
Wakeup and RESET. This unique combination of extremely
low quiescent current and full microprocessor control
makes the NCV8508 ideal for use in battery operated,
microprocessor controlled equipment in addition to being a
good fit in the automotive environment.
The NCV8508 Wakeup function brings the
microprocessor out of Sleep mode. The microprocessor in
turn signals its Wakeup status back to the NCV8508 by
issuing a Watchdog signal.
The Watchdog logic function monitors an input signal
(WDI) from the microprocessor. The NCV8508 responds to
the falling edge of the Watchdog signal which it expects at
least once during each Wakeup period. When the correct
Watchdog signal is received, a falling edge is issued on the
Wakeup signal line.
RESET is independent of V IN and operates correctly to an
output voltage as low as 1.0 V. A signal is issued in any of
three situations. During power up, the RESET is held low
until the output voltage is in regulation. During operation, if
the output voltage shifts below the regulation limits, the
RESET toggles low and remains low until proper output
voltage regulation is restored. Finally, a RESET signal is
issued if the regulator does not receive a Watchdog signal
within the Wakeup period.
The RESET pulse width, Wakeup signal frequency, and
Wakeup delay time are all set by one external resistor,
R Delay .
The Delay pin is a buffered bandgap voltage (1.25 V). It
can be used as a reference for an external tracking regulator
as shown in Figure 16.
The regulator is protected against short circuit and thermal
runaway conditions. The device runs through 45 volt
transients, making it suitable for use in automotive
environments.
MRA4004T3
200 mA
5V
V IN
V IN
V OUT
V BAT
0.1 m F
NCV8508
1.0 m F
CS8182
Adj
12 k
10 m F
3.9 k
Delay
V REF /ENABLE
GND
60 k
0.1 m F
GND
Figure 16. Application Circuit
http://onsemi.com
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8508D2T50R4 | 功能描述:低压差稳压器 - LDO 5V 250mA w/WatchDog 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 |
| NCV8508D2T50R4G | 功能描述:低压差稳压器 - LDO ANA 5.0V LDO WD REG 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 |
| NCV8508DW50 | 功能描述:低压差稳压器 - LDO 5V 250mA w/WatchDog 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 |
| NCV8508DW50G | 功能描述:低压差稳压器 - LDO 5V 250mA w/WatchDog 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 |
| NCV8508DW50R2 | 功能描述:低压差稳压器 - LDO 5V 250mA w/WatchDog 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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