AT1203
Preliminary Product Information
Low Noise, 300mA CMOS LDO Regulator
Electrical characteristics
( V
IN
=5V, Ta =+25℃, EN=IN, C
IN
=1µF, C
OUT
=1µF, C
BP
=10nF, unless otherwise noted. )
Parameter
Symbol
Condition
Values
Min. Typ. Max.
Unit
Input Undervoltage Lockout
-
2.3
-
V
V
UVLO
V
IN
=3V to 2V Sweep, EN=IN
Threshold
Input Undervoltage Lockout
-
100
-
mV
Hysteresis Threshold
Standby Mode, EN=GND
-
0.01
1
µA
Quiescent Current
I
Q
Active Mode, EN=IN, No Load
-
90
130
µA
Output Voltage Accuracy
I
OUT
=1mA
-2
-
+2
%
Output Current
I
OUT
300
-
-
mA
Output Current Limit
I
LIM
V
IN
=V
OUT
+1,
∆V
OUT
=-0.1V
-
400
-
mA
Dropout Voltage (Note 1)
I
OUT
=300mA
-
300
350
mV
Load Regulation
∆V
LDR
I
OUT
=1mA to 300mA
-
-
30
mV
V =(V
OUT
+0.3) to 5.5V,
-0.2
-
+0.2
%/V
Line Regulation (Note 2)
∆V
LNR IN
I
OUT
=1mA
10Hz to 100KHz, I
OUT
=50mA,
-
60
-
dB
Ripple Rejection Rate
PSRR
C
OUT
=1µF
μV
RMS
Output Voltage Noise
e
n
C
OUT
=1µF
-
400
-
Enable Control
EN Input-Voltage High
V
IH
V
EN
=0V to 2V
1.2
-
-
V
EN Input-Voltage Low
V
IL
V
EN
=2V to 0V
-
-
0.4
V
EN Input Leakage Current
V
EN
=5V
-
-
2
µA
Enable Exit Delay
C
BP
=0.1µF, No Load, C
OUT
=1µF
-
90
-
µs
Thermal Protection
Thermal-Shutdown
T
SHDN
Junction Temperature Rising
-
150
-
℃
Temperature
Thermal-Shutdown
∆T
SHDN
-
30
-
℃
Hysteresis
Note1：The dropout voltage is measured from V
IN
to V
OUT
when V
OUT
is 2% below its nominal
value. The nominal output voltage is measured from V
OUT
to GND when V
IN
is 1V greater
than V
OUT
. Defined only for V
OUT
≥
2.5V.
Note2：For
V
OUT
< 2V, V
IN
must be above 2.5V.
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
1/22/2007 REV:1.0
Email:
service@aimtron.com.tw
5
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
