Revision 9/26/2012

Preliminary and all contents are subject to change without prior notice

© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 4

Low Power Low Noise LDO

CMOS Voltage Regulator

SE5509

Line Regulation

(IOUT=10mA)

3.15

3.20

3.25

3.30

3.35

3.40

3.60

4.10

4.60

5.10

VIN (V)

Load Regulation

(VIN=4.3V)

3.15

3.20

3.25

3.30

3.35

3.40

0

100

200

300

400

IOUT (mA)

IQ VS. IOUT(VOUT=3.3V)

20

22

24

26

28

30

32

0

50

100

150

200

250

300

350

IOUT (mA)

IQ VS. VIN(VOUT=3.3V)

25.0

25.5

26.0

26.5

27.0

27.5

3.6

4.0

4.4

4.8

5.2

5.6

VIN (V)

0

10

20

30

40

50

60

70

80

0.1

1

10

100

Frequency (kHz)

PSRR

(VIN=VOUT+1V+0.5Vp-pAC，IOUT=50mA，Cbypass=0.1

µF)

Input Transient Response (VOUT = 3.3V)

(VIN=3.6V to 5.0V)

Load Transient Response (VOUT = 3.3V)

(IOUT=10mA to 300mA)