Datasheet

MAX1982/MAX1983
Low-Voltage, Low-Dropout Linear Regulators
with External Bias Supply
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 3, V
IN
= 1.8V, I
LOAD
= 1mA, C
LOAD
= 10µF, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 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.
ADJ, IN, BIAS, PGOOD, SHDN, OUT to GND..........-0.3V to +6V
Output Short-Circuit Duration ............................................Infinite
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/
o
C above +70°C)............696mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65
o
C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYM B O L
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage V
IN
1.25
5.5 V
BIAS Voltage V
BIAS
4.5 5.5 V
V
OUT
Voltage Range V
OUT
MAX1983 0.8 2.0 V
BIAS Input Undervoltage Lockout
3.8 4.1
4.35
V
Shutdown Supply Current I
IN
1.25V < V
IN
< 5.5V 1 5 µA
Quiescent BIAS Current I
Q
4.5V < V
BIAS
< 5.5V
140
250 µA
Shutdown BIAS Current I
SHDN
4.5V < V
BIAS
< 5.5V 1 5 µA
MAX1982: V
IN
= open, V
OUT
= 1.20V
30
V
OUT
Input Bias Current
MAX1983: V
IN
= open, 0.8V < V
OUT
< 2.0V
2
µA
MAX1983 ADJ Input Current
0V < V
ADJ
< 2.0V
1µA
REGULATOR CHARACTERISTICS
Line Regulation
ΔV
OUT
/
ΔV
IN
I
LOAD
= 10mA, 1.5V < V
IN
< 5.5V
-0.15 +0.15
%/V
T
A
= +25°C, I
OUT
= 100mA -1 +1
MAX1982 1.20V
Output Voltage Accuracy
V
OUT
T
A
= 0°C to +85°C, I
OUT
= 1mA to 300mA,
V
OUT
+ 0.5V < V
IN
< 5.5V
-3 +3
%
T
A
= +25°C, I
OUT
= 100mA -1 +1
MAX1983 0.80V
Output Voltage Accuracy
V
OUT
T
A
= 0°C to +85°C, I
OUT
= 1mA to 300mA,
V
OUT
+ 0.5V < V
IN
< 5.5V
-3 +3
%
I
LOAD
= 300mA 350
Dropout Voltage V
DO
I
LOAD
= 150mA 175
mV
Current Limit I
LIM
V
IN
- V
OUT
= 1.3V
330 600 1400
mA
Thermal-Shutdown Temperature
T
SHDN
160
°C
Thermal-Shutdown Hysteresis 20 °C
RMS Output Noise 10Hz to 100kHz 65
µV
RMS
PGOOD COMPARATOR
Comparator Threshold % of regulated output voltage
-12.5
-9 -6 %
Comparator Hysteresis V
HYST
10 mV