User guide

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940
Data Sheet
7
Sept. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited
Operating Conditions: V
IN
=2.8V, I
OUT
=10mA, C
IN
=10µF, C
OUT
=10µF, T
J
=25
o
C, unless otherwise specified.
The Boldface applies over -40
o
C≤T
J
≤125
o
C.
Parameter Symbol Condition Min Typ Max Unit
Output Voltage V
OUT
I
OUT
=10mA 1.782 1.8 1.818 V
10mA≤I
OUT
≤1A, 2.8V≤V
IN
≤13.2V 1.764 1.8 1.836 V
Line Regulation V
RLINE
I
OUT
=10mA, 2.8V≤V
IN
≤13.2V 3.6 18 mV
Load Regulation V
RLOAD
V
IN
=2.8V, 10mA≤I
OUT
≤1A 5.4 27 mV
Output Voltage
Temperature Coefficient
∆V
OUT
/∆TI
OUT
=10mA 36 180
µV/
o
C
Dropout Voltage (Note 3)
V
DROP
∆V
OUT
=1%
I
OUT
=100mA 290 500 mV
I
OUT
=1A 330 750 mV
Ground Current I
GND
V
IN
=2.8V
I
OUT
=750mA 12 25 mA
I
OUT
=1A 18 mA
Short Circuit Current I
SC
V
OUT
=0V (Note 2) 1.5 2.2 A
Minimum Load Current I
LOAD (MIN)
15mA
Output Noise Voltage (rms) 10Hz to 100KHz, I
OUT
=100mA,
C
OUT
=10µF
400 µV
Thermal Resistance
θ
JC
TO-252-2 (1)/TO-252-2 (3) 7.8
o
C/W
SOT-223 29.7
Electrical Characteristics
AZ2940-1.8 Electrical Characteristics
Note 2: V
IN
=V
OUT(NOMINAL)
+1V.
Note 3: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value
which is measured at V
OUT
+1V applied to V
IN
. In application, V
IN
should be no less than 2.5V.