Datasheet

MAX1725/MAX1726
12V, Ultra-Low I
Q
, Low-Dropout
Linear Regulators
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= V
OUT
+ 1V, SHDN = IN, I
OUT
= 1mA, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
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.
IN to GND ................................................................-14V to +14V
SHDN to GND..............................................-0.3V to (V
IN
+ 0.3V)
(-0.3V to + 0.3V when V
IN
< 0V)
OUT, FB (MAX1725 only) to GND...................-0.3V to +6V when
V
IN
>5.7V; -0.3V to (V
IN
+ 0.3V) when 0V <
V
IN
< 5.7V; -0.3V to +0.3V when V
IN
< 0V
OUT Continuous Current...................................................200mA
OUT Short Circuit...........................................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
Junction Temperature......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
V
SHDN
= 0V, V
IN
= 12V, V
OUT
= 0V
V
IN
= 12V
(Note 3)
V
IN
= -12V, V
SHDN
= 0V
V
IN
= 2.5V to 12V
V
IN
= 12V, V
OUT
= 0V
V
FB
= 1.25V
I
OUT
= 20mA for V
OUT
≥ 2.5V, I
OUT
= 10mA for
V
OUT
< 2.5V, not applicable for V
OUT
< 1.9V
V
IN
= (V
OUT
+ 1V) or 3V (Note 5)
MAX1725 only
V
IN
= 2.5V or (V
OUT
+ 0.5V) to 12V
I
OUT
= 1mA to 20mA, V
IN
= (V
OUT
+ 1V)
or 3V (min)
V
SHDN
= 0V to 12V
CONDITIONS
°C15Thermal-Shutdown Hysteresis
µA0.01 10IN Reverse Leakage Current
1.5
nA
-20 2 +20
I
FB
FB Input Bias Current
(MAX1725 only)
0.1
nA
-50 +50
I
SHDN
SHDN Input Bias Current
µA0.7 2I
IN(SHDN)
Shutdown Supply Current
µA2 4.5I
IN
V2.5 12V
IN
Input Voltage Range
Supply Current
V
2V
IH
mA40I
SC
Foldback Current Limit
mV300 600∆V
DO
Dropout Voltage (Note 5)
mA20 80I
OUT
Maximum OUT Current
V1.5 5V
OUT
OUT Voltage Range
%
-1.5 1.5
OUT Voltage Accuracy (Note 4)
%/V0.01 0.3∆V
LNR
Line Regulation
%/mA0.015 0.15∆V
LDR
Load Regulation
UNITSMIN TYP MAXSYMBOLPARAMETER
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
MAX1725 only (Note 4) V1.245V
FB
FB Voltage
-2 +2
-3 +3
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
0.5V
IL
SHDN Input Threshold
Temperature rising °C150Thermal-Shutdown Threshold
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial
.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
Junction-to-Ambient Thermal Resistance (θ
JA
)...............140°C/W