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參數(shù)資料
| 型號： | LM9070T |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PZFM7 |
| 封裝： | TO-220, 7 PIN |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 292K |
| 代理商： | LM9070T |
Control Logic Truth Table
ON/OFF
Input
L
↑
H
↓
↓
↑
H
L
Keep-Alive
Input
X
X
X
H
L
L
X
L
Output
Voltage
0V
5V
5V
0V
5V
5V
Reset
Output
L
↑
after delay
H
L
H
H
L
L
Operating Condition
Low quiescent current standby (OFF) condition
Output turns ON
Normal ON condition
Output turns OFF
Output kept ON by Keep-Alive Input
Output remains ON (or turns ON)
Output pulled out of regulation, reset flag generated
Output latches OFF
V
OUT
≥
300 mV
V
OUT
≤
4V
Block Diagram
Application Information
The LM9070 voltage regulator has been optimized for use in
microprocessor based automotive systems. Several unique
design features have been incorporated to address many
FMEA (Failure Mode Effects Analysis) concerns for fail-safe
system performance.
FAULT TOLERANT FEATURES
While not specifically guaranteed due to production testing
limitations, the LM9070 has been tested and shown to con-
tinue to provide a regulated output and, not generate an er-
roneous system reset signal while subjected to high levels of
RF electric field energy (up to 300 V/m signal strength over
a 2 MHz to 400 MHz frequency range). This is very important
in vehicle safety related applications where the system must
continue to operate normally. To maintain this immunity to
RFI the output bypass capacitor is important (47 μF is rec-
ommended).
This regulator is suitable for applications where continuous
connection to the battery is required (Refer to the Typical Ap-
plication Circuit ). ON/OFF control of the regulator and sys-
tem can be accomplished by switching the ON/OFF input to
the battery or ignition supply V
IN
supply through a SPST
switch. If this input becomes open circuited, an internal
pull-down resistor ensures that the regulator turns OFF.
When the regulator is switched OFF the current load on the
battery drops to less than 60 μA. With the possibility in many
applications for V
and the ON/OFF input pins to be con-
nected in a system through long lengths of wire, the ESD
protection of these pins has been increased to 12 kV with the
addition of small input bypass capacitors.
DS012831-22
DS012831-23
FIGURE 1. Typical Application Circuit
L
www.national.com
7
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| LM9070T/FLOW/LB09 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator |
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| LM9071 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low-Dropout System Voltage Regulator with Delayed Reset |
| LM9071S | 功能描述:低壓差穩(wěn)壓器 - 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 |
| LM9071S/NOPB | 功能描述:低壓差穩(wěn)壓器 - 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 |
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