AAT3236(2001) データシートの表示（PDF） - Advanced Analogic Technologies

部品番号

コンポーネント説明

一致するリスト

AAT3236
(Rev.:2001)

300mA CMOS High Performance LDO

Advanced Analogic Technologies 

AAT3236

300mA CMOS High Performance LDO

VIN = 4.2 volts

VOUT = 3.0 volt

%DC = 100(PD(MAX)/((VIN-VOUT)IOUT+(VINxIGND))

%DC = 100(526mW/((4.2V-3.0V)500mA+(4.2Vx150µA))

%DC = 87.57%

For a 500mA output current and a 1.2 volt drop

across the AAT3236 at an ambient temperature of

25°C, the maximum on time duty cycle for the

device would be 87.57%.

The following family of curves show the safe oper-

ating area for duty cycled operation from ambient

room temperature to the maximum operating level.

High Peak Output Current Applications

Some applications require the LDO regulator to

operate at a continuous nominal level with short

duration high current peaks. The duty cycles for

both output current levels must be taken into

account. To do so, one would first need to calcu-

late the power dissipation at a nominal continuous

level and then factor in the additional power dissi-

pation due to the short duration high current peaks.

For example, a 3.3V system using a AAT3236IGV-

3.3-T1 operates at a continuous 100mA load current

level and has short 500mA current peaks. The cur-

rent peak occurs for 378µs out of a 4.61ms period.

It will be assumed the input voltage is 4.2V.

Device Duty Cycle vs. VDROP

VOUT = 2.5V @ 25 degrees C

3.5

3

2.5

500 mA

200 mA

2

1.5

400 mA

1

300 mA

0.5

0

0 10 20 30 40 50 60 70 80 90 100

Duty Cycle (%)

Device Duty Cycle vs. V DROP

VOUT = 2.5V @ 85 degrees C

3.5

3

2.5

2

200 mA

1.5

1 500 mA

0.5

400 mA

300 mA

0

0 10 20 30 40 50 60 70

Duty Cycle (%)

100 mA

80 90 100

3236.2001.11.0.9

Device Duty Cycle vs. VDROP

VOUT = 2.5V @ 50 degrees C

3.5

3

2.5 500 mA

200 mA

100 mA

2

1.5

400 mA

1

300 mA

0.5

0

0 10 20 30 40 50 60 70 80 90 100

Duty Cycle (%)

11

Share Link: