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參數(shù)資料
| 型號(hào)： | NCV8508DW50R2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5.0 V, 250 mA LDO with Watchdog and RESET |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.9 V DROPOUT, PDSO16 |
| 封裝： | SOP-16 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大小： | 89K |
| 代理商： | NCV8508DW50R2 |
NCV8508
http://onsemi.com
8
DETAILED OPERATING DESCRIPTION
The NCV8508 is a precision micropower voltage
regulator with very low quiescent current (100 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
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.
function
brings
the
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. And 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.
V
OUT
GND
V
IN
NCV8508
1.0 F
0.1 F
Delay
V
BAT
V
IN
Figure 16. Application Circuit
CS8182
10 F
0.1 F
60 k
GND
Adj
MRA4004T3
V
REF
/ENABLE
3.9 k
12 k
200 mA
5 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8508DW50R2G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 250mA w/WatchDog RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8508PD50 | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 250mA w/WatchDog RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8508PD50G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 250mA w/WatchDog Reset RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8508PD50R2 | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 250mA w/WatchDog RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8508PD50R2G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 250mA w/WatchDog Reset RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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