Datasheet > AAT3244

AAT3244

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		稳压器
页数	文件大小	规格书
15页	807K
描述
300mA Adjustable Dual CMOS Low Voltage LDO Linear Regulator

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AAT3244 数据手册

AAT3244

300mA Adjustable Dual CMOS

Low Voltage LDO Linear Regulator

VCC

100K

TSOPJW-12

(Optional)

VCC

OUTA

POKA

POKB

INA

POKA

POKB

INA

22pF

Adj.

FBA

2.2uF

59K

1uF

ENA

ENB

ENA

AAT3244

ON/OFF

(Optional)

OUTB

FBB

Adj.

INB

22pF

ENB

2.2uF

GND

59K

ON/OFF

1uF

Figure 1: AAT3244 Schematic.

Adjustable Output Resistor Selection

R2 = 59kΩ R2 = 221kΩ

Resistors R1, R2 and R3, R4 of Figure 1 program

the outputs to regulate at a voltage higher than

0.6V. To limit the bias current required for the exter-

nal feedback resistor string while maintaining good

noise immunity, the suggested value for R2 and R4

is 59kΩ. Decreased resistor values are necessary

to maintain noise immunity on the FB pin, resulting

in increased quiescent current. Table 1 summarizes

the resistor values for various output voltages.

V_OUT(V)

R1 (kΩ)

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.8

1.85

2.0

2.5

3.3

3.6

19.6

29.4

39.2

49.9

59.0

68.1

78.7

88.7

118

113

150

187

221

261

301

332

442

464

523

715

1000

1105

⎛

⎝

⎞

· R2

OUT

REF

R1 =

- 1

⎠

124

137

187

267

295

With enhanced transient response for extreme

pulsed load application, an external feed-forward

capacitor, (C6 and C7 in Figure 1), can be added.

Table 1. Adjustable Resistor Values For LDO

Regulator.

3244.2007.08.1.1

1...8 9 101112 13 14 15

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