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參數(shù)資料
| 型號： | NCV8503PWADJR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower 400 mA LDO Linear Regulators with ENABLE, DELAY, Adjustable RESET, and General Use Comparator |
| 中文描述： | 1.261 V-1.339 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO16 |
| 封裝： | LEAD FREE, SOIC-16 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 193K |
| 代理商： | NCV8503PWADJR2G |
NCV8503 Series
http://onsemi.com
9
CIRCUIT DESCRIPTION
REGULATOR CONTROL FUNCTIONS
The NCV8503 contains the microprocessor compatible
control function RESET (Figure 15).
Figure 15. Reset and Delay Circuit Wave Forms
V
IN
V
OUT
RESET
DELAY
(V
DT
)
Threshold
DELAY
Threshold
RESET
T
d
T
d
RESET Function
A RESET signal (low voltage) is generated as the IC
powers up until V
OUT
is within 1.5% of the regulated output
voltage, or when V
OUT
drops out of regulation,and is lower
than 4.0% below the regulated output voltage. Hysteresis is
included in the function to minimize oscillations.
The RESET output is an open collector NPN transistor,
controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC thereby
guaranteeing that the RESET signal is valid for V
OUT
as low
as 1.0 V.
Adjustable Reset Function
The reset threshold can be made lower by connecting an
external resistor divider to the R
ADJ
lead from the V
OUT
lead, as displayed in Figure 16. This lead is grounded to
select the default value of 4.6 V (on the 5.0 V option).
Figure 16. Adjustable RESET
R
ADJ
to P and
System
Power
R
RST
V
OUT
C
OUT
RESET
C
DELAY
DELAY
NCV8503
to P and
RESET
Port
V
R(ADJ)
ENABLE Function
The part stays in a low I
Q
sleep mode when the ENABLE
pin is held low. The part has an internal pull down if the pin
is left floating.
The integrity of the ENABLE pin allows it to be tied to the
battery line through an external resistor. It will withstand
load dump potentials in this configuration.
Figure 17. ENABLE Function
V
IN
V
OUT
GND
NCV8503
ENABLE
V
BAT
Up to 45 V
10 k
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 4.0 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.
FLAG/Monitor Comparator
A general use comparator is included whose positive input
terminal is tied to the on
chip band gap voltage reference.
This provides a very temperature stable referenced
comparator with versatile uses in any system. The trip point
can be programmed externally using a resistor divider to the
input monitor (MON) (Figure 18). The typical threshold is
1.28 V on the MON pin.
Figure 18. Flag/Monitor Function
V
BAT
V
IN
MON
V
OUT
C
OUT
V
CC
I/O
RESET
P
FLAG
RESET
GND
DELAY
NCV8503
R
ADJ
V
MON
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCV8503 | Micropower 400mA LDO Linear Regulators with ENABLE, DELAY, Adjustable RESET, and General Use Comparator(微功耗400mA，帶使能、延時、可調(diào)復位端與通用比較器的低壓差線性穩(wěn)壓器) |
| NCV8504 | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504_07 | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW25G | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW25R2G | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8504 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW25 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA w/Delay 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8504PW25G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA w/Delay 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8504PW25R2 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA w/Delay 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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