Datasheet > AAT3520IGY-3.08-50-T1

AAT3520IGY-3.08-50-T1

更新时间： 2024-02-16 21:03:54

品牌	Logo	应用领域
思佳讯 - SKYWORKS		/
页数	文件大小	规格书
10页	412K
描述
Power Supply Support Circuit,

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AAT3520IGY-3.08-50-T1 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.33
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	Base Number Matches：	1

AAT3520IGY-3.08-50-T1 数据手册

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PRODUCT DATASHEET

AAT3520/2/4

PowerManager

MicroPower Microprocessor Reset Circuit

Supply Voltage Transient Behavior

Applications Information

In some cases, fast negative transients of short duration

can appear on the V_CCpower supply. The AAT3520 series

devices provide some immunity to line transients which

can generate invalid reset pulses. Figure 1 shows typical

behavior to short duration pulses versus RESET com-

parator overdrive. As shown in the Maximum Transient

Duration vs. Reset Threshold Overdrive graph, when the

transient voltage becomes larger, the time allowed

before asserting a reset becomes shorter (i.e., typically

a transient of 100mV below the reset threshold would

have to present for more than 50μs to cause a reset).

Immunity can be increased by the addition of a small

bypass capacitor of 0.1μF connected as closely to the V_CC

pin as possible.

Reset Output Options

The AAT3524 has an active low open drain output and

the AAT3520/2 have a push-pull output. The AAT3524

may be used in multiple voltage systems with an exter-

nal pull-up resistor. This allows the AAT3524 to interface

to microprocessors with higher supply voltages up to

5.5V (Figure 3). In the event of a power down or brown-

out condition, the reset signal remains valid until the V_CC

drops below 1.2V. To ensure validity down to ground, an

external 100kΩ resistor should be connected between

the RESET output and GND.

V_CC

VCC

µP

100kΩ

(nominal)

AAT3520

RESET

INPUT

RESET

0.1µF

AAT3522

AAT3524

(RESET)

GND

*AAT3524 Only

Figure 2: Using Recommended Bypass Capacitor.

w w w . a n a l o g i c t e c h . c o m

3520.2010.03.1.4

1...4 5 678 9 10

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