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MAX1725EUK+T

P1-P3P4-P6P7-P8
19-1680; Rev 2; 11/12
MAX1725/MAX1726
12V, Ultra-Low I
Q
, Low-Dropout
Linear Regulators
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
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
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
V
IN
2.5V TO 12V
OUTPUT
1.5V TO 5V
MAX1726
OFF
ON
IN OUT
SHDN
GND
PART
OUTPUT VOLTAGE
(V)
MAX1725EUK+T
Adj 1.5 to 5.0
MAX1726EUK18+T
Fixed 1.8
MAX1726EUK25+T
Fixed 2.5
MAX1726EUK25/V+T
Fixed 2.5
MAX1726EUK33+T
Fixed 3.3
MAX1726EUK50+T
Fixed 5.0
Typical Operating Circuit
Ordering Information
Selector Guide
Pin Configuration appears at end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
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.
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
0
1
3
2
4
5
4675 8 9 101112
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX1725/26 toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
0
1
3
2
4
5
SUPPLY CURRENT vs. LOAD CURRENT
MAX1725/26 toc02
LOAD CURRENT (mA)
SUPPLY CURRENT (µA)
01051520
V
IN
= 5V
0
3
2
1
4
5
-40 0 20-20 40 60 80
SUPPLY CURRENT vs. TEMPERATURE
MAX1725/26 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
IN
= 5V
-1.4
-1.0
-0.4
-0.6
-0.2
0
4675 8 9 101112
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1725/26 toc04
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (%DEVIATION)
-0.8
-1.2
I
LOAD
= 20mA
I
LOAD
= 1mA
NOMINAL OUTPUT = 3.3V
-0.8
-0.4
0.2
-0.2
0.6
0.8
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX1725/26 toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE (% DEVIATION)
0
426
20
0.4
0
-0.6
8101214
16
18
NOMINAL OUTPUT = 3.3V
V
IN
= 4.5V
-0.30
-0.10
0.10
0
0.20
0.30
-40 0-20 20406080
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1725/26 toc06
TEMPERATURE (°C)
NORMALIZED OUTPUT VOLTAGE (%)
-0.20
I
OUT
= 1mA
Typical Operating Characteristics
(V
OUT
= +3.3V, I
OUT
= 1mA, T
A
= +25°C, unless otherwise noted.)
MAX1725/MAX1726
12V, Ultra-Low I
Q
, Low-Dropout
Linear Regulators
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(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)
Note 2: Limits are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 3: Guaranteed by OUT line-regulation testing.
Note 4: OUT accuracy from nominal voltage. The MAX1725 is tested at V
OUT
= 1.5V, 2.5V, and 5V.
Note 5: When V
OUT
falls to 4% below its value at V
IN
= V
OUT
+ 1V.
I
OUT
from 1mA to 10mA, t
R
= t
F
= 1µs
∆V
IN
= ±0.25V, t
R
= t
F
= 5µs
f = 10Hz to 100kHz
CONDITIONS
mV200
OUT Load-Transient
Overshoot/Undershoot
mV15
OUT Line-Transient
Overshoot/Undershoot
µV
RMS
350e
n
OUT Noise
UNITSMIN TYP MAXSYMBOLPARAMETER
P1-P3P4-P6P7-P8

MAX1725EUK+T

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Buy MAX1725EUK+T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 12V Ultra-Low-IQ
Lifecycle:
New from this manufacturer.
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