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AAT3221IJS-3.3-T1

更新时间： 2024-01-22 22:28:54

品牌	Logo	应用领域
ANALOGICTECH		稳压器电源电路光电二极管
页数	文件大小	规格书
16页	222K
描述
150mA NanoPower™ LDO Linear Regulator

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AAT3221IJS-3.3-T1 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Contact Manufacturer	零件包装代码：	SOIC
包装说明：	ROHS COMPLIANT, SC-70JW, 8 PIN	针数：	8
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.65
最大回动电压 1：	0.22 V	最大输入电压：	5.5 V
最小输入电压：	3.586 V	JESD-30 代码：	R-PDSO-C8
长度：	2 mm	功能数量：	1
端子数量：	8	工作温度TJ-Max：	150 °C
工作温度TJ-Min：	-40 °C	最大输出电流 1：	0.1 A
最大输出电压 1：	3.366 V	最小输出电压 1：	3.234 V
标称输出电压 1：	3.3 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	VSOC	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, VERY THIN PROFILE	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	调节器类型：	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：	1.1 mm	表面贴装：	YES
端子形式：	C BEND	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	1.75 mm	Base Number Matches：	1

AAT3221IJS-3.3-T1 数据手册

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PRODUCT DATASHEET

AAT3221/2

PowerLinear^TM

150mA NanoPower™ LDO Linear Regulator

X7R, X5R, Z5U, and Y5V dielectric materials. Large

ceramic capacitors, typically greater than 2.2μF, are often

available in low-cost Y5V and Z5U dielectrics. These two

material types are not recommended for use with LDO

regulators since the capacitor tolerance can vary more

than ±50% over the operating temperature range of the

device. A 2.2μF Y5V capacitor could be reduced to 1μF

over the full operating temperature range. This can cause

problems for circuit operation and stability. X7R and X5R

dielectrics are much more desirable. The temperature

tolerance of X7R dielectric is better than ±15%.

rapidly increase. Once the regulator’s power dissipation

capacity has been exceeded and the internal die tem-

perature reaches approximately 140°C, the system ther-

mal protection circuit will become active. The internal

thermal protection circuit will actively turn off the LDO

regulator output pass device to prevent the possibility of

over-temperature damage. The LDO regulator output will

remain in a shutdown state until the internal die tem-

perature falls back below the 140°C trip point.

The interaction between the short-circuit and thermal

protection systems allows the LDO regulator to with-

stand indefinite short-circuit conditions without sustain-

ing permanent damage.

Capacitor area is another contributor to ESR. Capacitors

that are physically large in size will have a lower ESR

when compared to a smaller sized capacitor of equiva-

lent material and capacitance value. These larger devic-

es can also improve circuit transient response when

compared to an equal value capacitor in a smaller pack-

age size.

No-Load Stability

The AAT3221/2 is designed to maintain output voltage

regulation and stability under operational no-load condi-

tions. This is an important characteristic for applications

where the output current may drop to zero. An output

capacitor is required for stability under no-load operating

conditions. Refer to the output capacitor considerations

section of this document for recommended typical out-

put capacitor values.

Consult capacitor vendor datasheets carefully when

selecting capacitors for use with LDO regulators.

Enable Function

The AAT3221/2 features an LDO regulator enable / dis-

able function. This pin (EN) is compatible with CMOS

logic. Active high or active low options are available (see

Ordering Information). For a logic high signal, the EN

control level must be greater than 2.4 volts. A logic low

signal is asserted when the voltage on the EN pin falls

below 0.6 volts. For example, the active high version

AAT3221/2 will turn on when a logic high is applied to

the EN pin. If the enable function is not needed in a spe-

cific application, it may be tied to the respective voltage

level to keep the LDO regulator in a continuously on

state; e.g., the active high version AAT3221/2 will tie V_IN

to EN to remain on.

Thermal Considerations and High Output

Current Applications

The AAT3221/2 is designed to deliver a continuous out-

put load current of 150mA under normal operating con-

ditions. The limiting characteristic for the maximum

output load safe operating area is essentially package

power dissipation and the internal preset thermal limit of

the device. In order to obtain high operating currents,

careful device layout and circuit operating conditions

need to be taken into account. The following discussions

will assume the LDO regulator is mounted on a printed

circuit board utilizing the minimum recommended foot-

print and the printed circuit board is 0.062-inch thick

FR4 material with one ounce copper.

Short-Circuit Protection and Thermal

Protection

The AAT3221/2 is protected by both current limit and

over-temperature protection circuitry. The internal short-

circuit current limit is designed to activate when the

output load demand exceeds the maximum rated output.

If a short-circuit condition were to continually draw more

than the current limit threshold, the LDO regulator’s out-

put voltage will drop to a level necessary to supply the

current demanded by the load. Under short-circuit or

other over-current operating conditions, the output volt-

age will drop and the AAT3221/2 die temperature will

At any given ambient temperature (T_A), the maximum

package power dissipation can be determined by the fol-

lowing equation:

T_J(MAX)- T_A

θ_JA

P_D(MAX)

Constants for the AAT3221/2 are T_J(MAX), the maximum

junction temperature for the device which is 125°C and

Θ_JA= 150°C/W, the package thermal resistance. Typically,

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

3221.2007.11.1.12

1...7 8 91011 12 13...16

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与AAT3221IJS-3.3-T1相关器件

型号	品牌	获取价格	描述	数据表
AAT3221IJS-3.5-T1	AAT	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3221IJS-3.5-T1	ANALOGICTECH	获取价格	150mA NanoPower™ LDO Linear Regulator
AAT3221IJS-30-T1	ANALOGICTECH	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3221IJS-33-T1	ANALOGICTECH	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3221IJS-35-T1	ANALOGICTECH	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3222	ANALOGICTECH	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3222	AAT	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3222IGV-1.8-T1	AAT	获取价格	150mA NanoPower⑩ LDO Linear Regulator
AAT3222IGV-1.8-T1	ANALOGICTECH	获取价格	150mA NanoPower™ LDO Linear Regulator
AAT3222IGV-18-T1	ANALOGICTECH	获取价格	150mA NanoPower⑩ LDO Linear Regulator

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