AT1305
Preliminary Product Information
PFM Step-Up DC/DC Converter with LDO
Absolute Maximum Ratings
(Ta=+250C)
Parameter
Symbol
Condition
Rated Value
Min. Max.
Unit
Power supply voltage
LX pin voltage
VDD
VLX
VOUT
—
—
—
—
—
—
—
—
—
—
—
—
6.0
6.0
6.0
6.0
2.5
400
500
V
V
V
V
A
OUT output voltage
Other I/O pin voltage
LX pin output current
LDO output Peak Current
Allowable dissipation
ILX
ILDO
PD
—
mA
mW
TSSOP8
Operating temperature
Storage temperature
TOP
Tstg
—
—
-30
-55
+85
+165
0C
0C
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage,
current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
Electrical Characteristics
(V =1.0V, V
IN
=2.8V, I
OUT
=0mA ,Ta=+250C)
OUT
Values
Typ.
Parameter
Symbol
Condition
Unit
Min.
Max.
Start-Up Voltage
VST
IOUT=1mA
0.8
-
1
2
-
-
-
V
V
V
Power On Reset
Threshold
VDD
AT1305,AT1305A
AT1305B
2.0
1.6
-
5.5
5.5
-
Operating V
Range
DD
VDD
No-Load Input
Current
Switch- Off Input
Current
μA
μA
μA
V
IIN1
IIN2
IOUT=0mA
87
32
1
V
=5.5V
-
50
10
IN
Shutdown Current
Feedback Reference
FB Input Current
Constant on time
Maximum Duty
IIN3
EN=0V, /ENPB=High
Close Loop VDD =2.85V
VFB =1.2V
-
VFB
IFB
1.176
1.2
-
1.224
-
-
-
50
-
nA
FS
μS
%
VOUT =2.85V
4.5
85
DMAX
VOUT =2.85V
-
LX ON Resistance
RLX
N-Channel
-
0.3
-
Ω
2F, No.10, Prosperity RD. 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
Email: service@aimtron.com.tw
3
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
