PAM3101
300mA High PSRR Low Dropout CMOS Linear Regulator
Typical Performance Characteristics
A dioP
u recision
+
0
-1
0
-2
0
-3
0
-4
0
d
B
12/28/0617:44:10
9. Power Supply Ripple Rejection
T
10. Load Transient Response
Io
DC
Coupling
Io=300mA
Io=100mA
Vo
AC
Coupling
-5
0
-6
0
-7
0
-8
0
-9
0
-10
0
10
2
0
5
0
1
00
Io=1mA
2
00
50
0
1k
H
z
S eep T
w
race C
olor
2
k
5
k
1
0k
20
k
50 10
k 0k
Vo=2.5V,V
IN
=4V, Vpp=1V
LineS le T
ty
hick D
ata
S
olid
S
olid
S
olid
S
olid
1
1
1
1
Ais C m
x
om ent
Left
Left
Left
Left
Vo=2.5V, V
IN
=3.3V, Io=1mA to 300mA
11. Line Transient Response
Audio Precision
1
1
2
1
+0
TT TT
1
T
T
3
4
1
G
reen
Y
ellow
R
ed
M
agenta
A rosstalk
nlr.C
A rosstalk
nlr.C
A rosstalk
nlr.C
A rosstalk
nlr.C
12/28/06 17:15:08
-10
-20
-30
-40
d
B
-50
-60
-70
-80
-90
shanghai P R -3test.at1
SR
Io=300mA
Io=100mA
V
IN
DC
Coupling
V
O
AC
Coupling
Io=1mA
20
50
100
200
500
1k
Hz
2k
5k
10k
20k
50k 100k
-100
10
Vo=2.5V, V
IN
=4V, Vpp=1V, C
BYP
=10nF
Au P
dio recision
+0
-1
0
-2
0
-3
0
-4
0
d
B
-5
0
-6
0
-7
0
-8
0
-9
0
Vo=2.5V, V
IN
=3V to 5V,Io=1mA
01/22/0714:03:16
T TT
12. PSRR vs V-dropout@Vout=3.28V
0
-10
PSRR with bypass,
cap=10nF
PSRR without
bypass cap
Io=300mA
PSRR (dB)
2k
5k
10k
20
k
50k 100k
-20
Io=100mA
-30
-40
-50
Io=1mA
-10
0
10
20
50
100
200
500
1k
H
z
-60
20
40
60
80
100
120
140
160
180
200
220
V-dropout (mV)
Vo=1.8V,V
IN
=4V, Vpp=1V, C
BYP
=10nF
S eep T
w
race C
olor
1
2
3
1
1
1
LineS le T
ty
hick D
ata
2
2
2
Ais C m
x
om ent
R
ed
S
olid
M
agenta S
olid
B
lue
S
olid
A rosstalk Left
nlr.C
A rosstalk Left
nlr.C
A rosstalk Left
nlr.C
shanghai P R -3test.at1
SR
Power Analog Microelectronics, Inc
www.poweranalog.com
11/2010 Rev 2.5
10
PAM [ POWER ANALOG MICOELECTRONICS ]
