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參數(shù)資料
| 型號： | NCV8509PDW26R2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Sequenced Linear Dual−Voltage Regulator |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE REGULATOR, PDSO16 |
| 封裝： | LEAD FREE, SOIC-16 |
| 文件頁數(shù)： | 12/19頁 |
| 文件大小： | 198K |
| 代理商： | NCV8509PDW26R2G |
NCV8509 Series
http://onsemi.com
12
CIRCUIT DESCRIPTION
Figure 41. Dual Drive RESET Valid
V
IN
V
OUT1
RESET
Power Up
Short on
V
OUT1
V
IN1
Fast
Turn Off
RESET
Output Peak
Reset Delay
Reset Delay
Reset Delay
RESET
The RESET function gets its drive from both the input
(V
IN1
) and the output (V
OUT1
). Because of this, it is able to
maintain a more reliable reset valid signal. Most regulators
maintain a valid reset signal down to 1 V on the output
voltage. The reset on the NCV8509 is valid down to 0 V on
the output voltage V
OUT1
(power is provided via V
IN1
) and
the reset on the NCV8509 is valid down to 0 V on the input
voltage V
IN1
(power is provided via V
OUT1
). Refer to
Figure 41 for operation timing diagrams.
Delay Function
The reset delay circuit provides a programmable (by
external capacitor) delay on the RESET output lead.
The delay lead provides source current (typically 6.0
μ
A)
to the external delay capacitor during the following
proceedings:
1. During power up (once the regulation threshold
has been verified);
2. After a reset event has occurred and the device is
back in regulation.
The delay capacitor is discharged when the regulation
(RESET threshold) has been violated. This is a latched
incident. The capacitor will fully discharge and wait for the
device to regulate before going through the delay time event
again.
Power Shunt
R
EX
routes some of the current used in the V
OUT2
to a
second input pin (V
IN2
). This is accomplished by using an
internal shunt. A simplified version of this shunt is shown in
Figure 42. This has the effect of reducing the amount of
power dissipated on chip. The effects of choosing the
external resistor value are shown in Figure 43.
Selection of the optimum Rex resistor value can be done
using the following equation:
(Vin(max)
Iout2(max)
When not using the power shunt, short V
IN1
to V
IN2
.
4.5)
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| NCV8509 | Sequenced Linear Dual-Voltage Regulator |
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| NCV8509PDW18R2 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW25 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW25R2 | Sequenced Linear Dual-Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8512 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:5.0 V Micropower 150 mA LDO Linear Regulator with DELAY, Adjustable RESET, and Monitor FLAG |
| NCV8512PW50G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V MICROPOWER 150mA LDO 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8512PW50R2G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V MICROPOWER 150mA LDO 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8518 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators |
| NCV8518A | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Low Dropout Linear Regulator with Watchdog, Wake Up, RESET, and ENABLE |
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