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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1726 Datasheet

12V / Ultra-Low IQ / Low-Dropout Linear Regulators

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MAX1726 pdf
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
General Description
The MAX1725/MAX1726 are ultra-low supply current,
low-dropout linear regulators intended for low-power
applications that demand the longest possible battery
life. Unlike inferior PNP-based designs, the MAX1725/
MAX1726s’ PMOS pass elements maintain an ultra-low
2µA supply current throughout their entire operating
range and in dropout. Despite their ultra-low power
consumption, the MAX1725/MAX1726 have tight output
accuracy (1.5%) and require just 1µF output capacitance
to achieve good load-transient response.
These regulators have a wide input voltage range
(+2.5V to +12V), making them excellent choices for
systems powered from two lithium-ion (Li+) cells and 9V
batteries. Other features include reverse-battery protec-
tion, short-circuit protection, and thermal protection.
The MAX1725 provides an adjustable 1.5V to 5V output
using an external resistor-divider. The MAX1726 pro-
vides factory preset 1.8V, 2.5V, 3.3V, or 5V output volt-
ages (see the Ordering Information). Both devices are
available in a tiny 5-pin SOT23 package.
________________________Applications
Smoke Detectors
Remote Transmitters
Smart Battery Packs
Industrial Control Systems
Microcontroller Power
Real-Time Clock Backup Power
PDAs and Handy-Terminals
Battery-Powered Alarms
Typical Operating Circuit
VIN
2.5V TO 12V
ON
OFF
IN OUT
MAX1726
SHDN
GND
OUTPUT
1.5V TO 5V
Features
o 2µA Supply Current
o Reverse-Battery Protection
o +2.5V to +12V Input Voltage Range
o Fixed 1.8V, 2.5V, 3.3V, and 5V Output Voltages
(MAX1726)
o Adjustable 1.5V to 5V Output Voltages (MAX1725)
o 20mA Guaranteed Output Current
o 1.5% Output Voltage Accuracy
o Small 1µF Output Capacitor
o Short-Circuit Protection
o Thermal Protection
o Tiny 5-Pin SOT23 Package
Ordering Information
PART
PIN-
TOP
TEMP RANGE
PACKAGE MARK
MAX1725EUK+T
-40°C to +85°C 5 SOT23 ADNK
MAX1726EUK18+T -40°C to +85°C 5 SOT23 ADNL
MAX1726EUK25+T -40°C to +85°C 5 SOT23 ADNM
MAX1726EUK25/V+T -40°C to +85°C 5 SOT23 AFMN
MAX1726EUK33+T -40°C to +85°C 5 SOT23 ADNN
MAX1726EUK50+T -40°C to +85°C 5 SOT23 ADNO
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive-qualified part.
Note: See the Selector Guide for the output options as they relate
to the part number suffix.
PART
MAX1725EUK+T
MAX1726EUK18+T
MAX1726EUK25+T
MAX1726EUK25/V+T
MAX1726EUK33+T
MAX1726EUK50+T
Selector Guide
OUTPUT VOLTAGE
(V)
Adj 1.5 to 5.0
Fixed 1.8
Fixed 2.5
Fixed 2.5
Fixed 3.3
Fixed 5.0
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1680; Rev 2; 11/12


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1726 Datasheet

12V / Ultra-Low IQ / Low-Dropout Linear Regulators

No Preview Available !

MAX1726 pdf
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
ABSOLUTE MAXIMUM RATINGS
IN to GND ................................................................-14V to +14V
SHDN to GND ..............................................-0.3V to (VIN + 0.3V)
(-0.3V to + 0.3V when VIN < 0V)
OUT, FB (MAX1725 only) to GND...................-0.3V to +6V when
VIN >5.7V; -0.3V to (VIN + 0.3V) when 0V <
VIN < 5.7V; -0.3V to +0.3V when VIN < 0V
OUT Continuous Current...................................................200mA
OUT Short Circuit...........................................................Indefinite
Continuous Power Dissipation (TA = +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
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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
Junction-to-Ambient Thermal Resistance (θJA)...............140°C/W
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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VIN = VOUT + 1V, SHDN = IN, IOUT = 1mA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
Supply Current
Shutdown Supply Current
OUT Voltage Range
FB Voltage
OUT Voltage Accuracy (Note 4)
Line Regulation
VIN
IIN
IIN(SHDN)
VOUT
VFB
VLNR
(Note 3)
VIN = 12V
VSHDN = 0V, VIN = 12V, VOUT = 0V
MAX1725 only
MAX1725 only (Note 4)
TA = +25°C
TA = 0°C to +85°C
TA = -40°C to +85°C
VIN = 2.5V or (VOUT + 0.5V) to 12V
2.5
2
0.7
1.5
1.245
-1.5
-2
-3
0.01
12
4.5
2
5
1.5
+2
+3
0.3
V
µA
µA
V
V
%
%/V
Load Regulation
VLDR
IOUT = 1mA to 20mA, VIN = (VOUT + 1V)
or 3V (min)
0.015 0.15 %/mA
Maximum OUT Current
IOUT VIN = (VOUT + 1V) or 3V (Note 5)
20 80
mA
Dropout Voltage (Note 5)
VDO
IOUT = 20mA for VOUT 2.5V, IOUT = 10mA for
VOUT < 2.5V, not applicable for VOUT < 1.9V
300 600 mV
Foldback Current Limit
SHDN Input Threshold
SHDN Input Bias Current
FB Input Bias Current
(MAX1725 only)
IN Reverse Leakage Current
Thermal-Shutdown Threshold
ISC
VIH
VIL
I SHDN
IFB
VIN = 12V, VOUT = 0V
VIN = 2.5V to 12V
V SHDN = 0V to 12V
TA = +25°C
TA = +85°C
VFB = 1.25V
TA = +25°C
TA = +85°C
VIN = -12V, V SHDN = 0V
Temperature rising
40 mA
2
V
0.5
-50 +50
nA
0.1
-20 2 +20
nA
1.5
0.01 10
µA
150 °C
Thermal-Shutdown Hysteresis
15 °C
2 Maxim Integrated


Part Number MAX1726
Description 12V / Ultra-Low IQ / Low-Dropout Linear Regulators
Maker Maxim
Total Page 8 Pages
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