AT1305
Preliminary Product Information
PFM Step-Up DC/DC Converter with LDO
Absolute Maximum Ratings*1
(T
a
=+25
0
C)
Parameter
Power supply voltage
LX pin voltage
OUT output voltage
Other I/O pin voltage
LX pin output current
LDO output Peak Current
Allowable dissipation
Operating temperature
Storage temperature
Symbol
V
DD
V
LX
V
OUT
I
LX
I
LDO
P
D
T
OP
T
stg
Condition
—
—
—
—
—
—
TSSOP8
—
—
Rated Value
Min.
Max.
—
6.0
—
—
—
—
—
—
-30
-55
6.0
6.0
6.0
2
400
500
+85
+165
Unit
V
V
V
V
A
mA
mW
0
0
C
C
1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other
conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect device reliability
.
Electrical Characteristics
(VIN=1.0V, VOUT =2.8V, IOUT=0mA ,Ta=+25
0
C)
Parameter
Symbol
Condition
Min.
Values
Typ.
0.8
2
-
Max.
-
-
5.5
5.5
87
32
1
1.2
-
1.75
-
50
10
1.224
50
-
Unit
Start-Up Voltage
Power On Reset
Threshold
Operating V DD
Range
No-Load Input
Current
Switch- Off Input
Current
Shutdown Current
Feedback Reference
FB Input Current
LX Switch On-time
V
ST
V
DD
V
DD
I
IN1
I
IN2
I
IN3
V
FB
I
FB
F
S
I
OUT
=1mA
0.7
-
V
V
V
V
μA
μA
μA
V
nA
μS
AT1305,AT1305A
AT1305B
I
OUT
=0mA
VIN=5V
EN=0V, /ENPB=High
Close Loop V
DD
=2.85V
V
FB
=1.2V
V
OUT
=2.85V
2.0
1.65
-
-
-
1.176
-
-
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
2/8/2006 REV:1.1
Email:
service@aimtron.com.tw
3
AIMTRON [ AIMTRON TECHNOLOGY ]
