New
R i p p l e F i l t e r I C A N 1 2 8 1 S S M
I
Overview
The AN1281SSM is a ripple filter IC that rejects the ripple component su-
perimposed on the regulator output. Use for the VCO bias of cellular phones
improves C/N and S/N.
I
Features
G
Small I/O voltage difference
G
The mounting area is reduced by adopting the SSmini-type package
I
Applications
G Cellular phones
and others
I
Block Diagram
1 Kotari-yakemachi, Nagaokakyo, Kyoto 617-8520, Japan
Tel. (075) 951-8151
http://www.panasonic.co.jp/semicon/
New publication, effective from Dec. 6. 2001
M00494AE
The products and specifications are subject to change without any notice. Please ask for the latest product standards to guarantee the satisfaction of your product requirements.
4
3
5
2
1
3
4
0 to 0.10
2
1
5
0.20
0.20
1.20
0.10
1.60
0.10
1.00
0.10
1.60
0.10
0.50
Seating plane
0.60 max.
0.08
+0.10 -
0.05
0.20
+0.10
-0.05
0.50
0.10
M
0.10
Unit: mm
SSMINI-5DA(Lead-free package)
Constant
current
Switch
Load
V
oltage control
Starter/smoothing
circuit
3
V
IN
On/Off
CF
GND
5
V
OUT
4
1
2
4.7
F
1
F
0.1
F
I Absolute Maximum Ratings
I Recommended Operating Range
Parameter
Symbol
Range
Unit
Supply voltage
V
CC
2.5 to 4.3
V
I Electrical Characteristics at T
a
= 25C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Output voltage 1
V
O1
V
IN
= 3.0 V, I
OUT
= -1
A
2.62
2.82
V
Output voltage 2
V
O2
V
IN
= 3.0 V, I
OUT
= -15 mA
2.55
2.70
V
Consumption current 1
I
CC1
V
IN
= 3.0 V, I
OUT
= -1
A
-735
-565
A
Consumption current 2
I
CC2
V
IN
= 3.0 V, I
OUT
= -15 mA
-670
-515
A
Load regulation
REG
L
V
IN
= 3.0 V, I
OUT
= -1
A to -15 mA
0
120
220
mV
Consumption current against
I
REG
V
IN
= 3.0 V, I
OUT
= -1
A to -15 mA
0
51
110
A
load change
Ripple rejection ratio 1
RR
1
V
IN
= 3 V 0.1 V, I
OUT
= -15 mA
26.5
29.5
dB
f = 1 kHz
Ripple rejection ratio 2
RR
2
V
IN
= 3 V 0.1 V, I
OUT
= -15 mA
30.5
33.5
dB
f = 25 kHz
Ripple rejection ratio 3
RR
3
V
IN
= 3 V 0.1 V, I
OUT
= -15 mA
26.5
29.1
dB
f = 100 kHz
Consumption current at off
I
OFF
V
IN
= 4.3 V, On/Off = 0 V
1
A
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes current flowing into the IC, and '-' denotes current flowing out of the IC.
2. *1: Except for the power dissipation, the operating ambient temperature and storage temperature, all ratings are for T
a
= 25C.
*2: The power dissipation shown is the value for T
a
= 75C.
*3: Do not over the supply voltage.
Parameter
Symbol
Rating
Unit
Supply voltage
V
IN
4.5
V
Supply current
I
CC
20
mA
Power dissipation
*2
P
D
60
mW
Operating ambient temperature
*1
T
opr
-25 to +75
C
Storage temperature
*1
T
stg
-40 to +125
C
Output current
I
O
-15
mA
Allowable application voltage for on/off pin
*3
V
ON/OFF
V
IN
V
Allowable maximum capacitance for CF pin
CF
10
F
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