Datasheet > AAT3200IQY-3.0-T1

AAT3200IQY-3.0-T1

更新时间： 2024-02-06 19:12:22

品牌	Logo	应用领域
ANALOGICTECH		稳压器
页数	文件大小	规格书
16页	169K
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

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:

1.5

150mA

0.5

100

Duty Cycle (%)

P_D(MAX)is assumed to be 200mW

Device Duty Cycle vs. V_DROP

(V_OUT= 2.5V @ 50°C)

I_GND= 20µA

I_OUT= 150mA

V_IN= 5.0V

V_OUT= 3.0V

3.5

100mA

2.5

200mA

150mA

P_D(MAX)

(V_IN- V_OUT)I_OUT+ (V_IN× I_GND

1.5

%DC = 100

)

0.5

200mW

(5.0V - 3.0V)150mA + (5.0V × 20µA)

%DC = 100

100

%DC = 66.6%

Duty Cycle (%)

For a 150mA output current and a 2.0 volt drop

across the AAT3200 at an ambient temperature of

85°C, the maximum on-time duty cycle for the

device would be 66.6%.

Device Duty Cycle vs. V_DROP

(V_OUT= 2.5V @ 85°C)

The following family of curves shows the safe oper-

ating area for duty-cycled operation from ambient

room temperature to the maximum operating level.

3.5

100mA

50mA

2.5

200mA

150mA

1.5

0.5

100

Duty Cycle (%)

3200.2005.04.1.1

1...9 10 111213 14 15 16

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