300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Load Regulation
(VIN=4.3V)
3.40
3.35
VOUT (V)
3.30
3.25
3.20
3.15
0
100
200
IOUT (mA)
SE5509
Line Regulation
(IOUT=10mA)
3.40
3.35
VOUT (V)
3.30
3.25
3.20
3.15
3.60
4.10
4.60
5.10
300
400
VIN (V)
IQ VS. IOUT(VOUT=3.3V)
32
30
IQ (μA)
IQ (μA)
28
26
24
22
20
0
50
100
150
200
IOUT (mA)
250
300
350
27.5
27.0
26.5
26.0
25.5
25.0
3.6
IQ VS. VIN(VOUT=3.3V)
4.0
4.4
4.8
VIN (V)
5.2
5.6
Load Transient Response (VOUT = 3.3V)
(IOUT=10mA to 300mA)
Input Transient Response (VOUT = 3.3V)
(VIN=3.6V to 5.0V)
PSRR
(VIN=VOUT+1V+0.5Vp-pAC，IOUT=50mA，Cbypass=0.1μF)
80
70
60
50
40
30
20
10
0
0.1
1
10
Frequency (kHz)
100
Revision 12/5/2008
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 4
PSRR (dB)
SEAWARD [ Seaward Electronics Inc. ]
