Datasheet > AAT3200IQY-2.3-T1

AAT3200IQY-2.3-T1

更新时间： 2022-12-14 18:24:02

品牌	Logo	应用领域
AAT		稳压器
页数	文件大小	规格书
16页	173K
描述
OmniPower™ LDO Linear Regulator

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AAT3200

OmniPower™ LDO Linear Regulator

Higher input-to-output voltage differentials can be

obtained with the AAT3200, while maintaining

device functions in the thermal safe operating area.

To accomplish this, the device thermal resistance

must be reduced by increasing the heat sink area

or by operating the LDO regulator in a duty-cycled

mode.

Device Duty Cycle vs. V_DROP

(V_OUT= 2.5V @ 25°C)

3.5

2.5

200mA

1.5

150mA

For example, an application requires V_IN= 5.0V

while V_OUT= 3.0V at a 150mA load and T_A= 85°C.

V_INis greater than 4.33V, which is the maximum

safe continuous input level for V_OUT= 3.0V at

150mA for T_A= 85°C. To maintain this high input

voltage and output current level, the LDO regulator

must be operated in a duty-cycled mode. Refer to

the following calculation for duty-cycle operation:

0.5

100

Duty Cycle (%)

Device Duty Cycle vs. V_DROP

P_D(MAX)is assumed to be 200mW.

(V_OUT= 2.5V @ 50°C)

3.5

I_GND= 20µA

I_OUT= 150mA

V_IN= 5.0V

V_OUT= 3.0V

100mA

2.5

200mA

150mA

1.5

0.5

P_D(MAX)

(V_IN- V_OUT)I_OUT+ (V_IN× I_GND

%DC = 100

)

100

Duty Cycle (%)

200mW

(5.0V - 3.0V)150mA + (5.0V × 20µA)

%DC = 100

%DC = 66.6%

Device Duty Cycle vs. V_DROP

(V_OUT= 2.5V @ 85°C)

For a 150mA output current and a 2.0V drop across

the AAT3200 at an ambient temperature of 85°C,

the maximum on-time duty cycle for the device

would be 66.6%.

3.5

100mA

50mA

2.5

The following family of curves shows the safe oper-

ating area for duty-cycled operation from ambient

room temperature to the maximum operating level.

200mA

150mA

1.5

0.5

100

Duty Cycle (%)

3200.2006.02.1.4

1...9 10 111213 14 15 16

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