A1085
AiT Semiconductor Inc.
www.ait-ic.com
3A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
THERMAL SHUTDOWN AND CURRENT LIMIT FUNCTIONS
Symbol
Parameter
Conditions
Min.
Typ.
3
Max.
10
Unit
mA
mA
uA
Minimum Load Current (Note 4)
A1085-ADJ
VIN=10V
Iq
Quiescent Current
Adjust Pin Current
4
10
IADJ
VIN=4.25V, IOUT=10mA
45
110
F=120Hz, COUT=25uF (Tan)
IOUT=3A, VIN-VOUT=3V
60
Ripple Rejection
dB
Adjust Pin Current
Change
Temperature Stability
Thermal Resistance
Junction to Case
10mA≦IOUT≦3A, 1.5V≦VIN≦6V
0.2
5
ICHANGE
uA
%
IOUT=10mA, VIN-VOUT=1.5V
TO-252
0.5
12.5
3
θJC
oC/W
TO-263-2 and TO-263-3
Note 1: The parameters of Line Regulation and Load Regulation are tested under constant junction temperature.
Note 2: When IOUT varies between 0~3A, VIN-VOUT varies between 1.5V~6V under constant junction temperature, the parameter is
satisfied the criteria in above mentioned. If temperature varies between -50oC≦TA≦140oC, needs output current to be larger
than 10mA to satisfy the criteria.
Note 3: Dropout Voltage is specified over IOUT=3A and the following testing conditions:
First step is to find out the VOUT Value (VOUT1), when VIN1 = VOUT +1.5V,
Second step is to decrease VIN (VIN2) until VOUT value is equal to 99% x VOUT1 (VOUT2). VDROPOUT= VIN2 - VOUT2
Note 4: Minimum Load Current is defined as the minimum output current required to maintain regulation.
When 1.5V≦VIN-VOUT≦6V, the device is guaranteed to regulate if the output current is greater than 10mA.
.
REV1.2
-AUG 2006 RELEASED – SEP 2008 REVISED -
- 4 -
AITSEMI [ AiT Semiconductor ]
