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MAX1818EUT25#TG16

P1-P3P4-P6P7-P9
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
General Description
The MAX1818 low-dropout linear regulator operates
from a +2.5V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 120mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed voltage (see
Selector Guide
) or can
be adjusted from 1.25V to 5.0V with an external resis-
tive divider.
An internal PMOS pass transistor allows the low 125µA
supply current to remain independent of load, making
this device ideal for portable battery-operated equip-
ment such as personal digital assistants (PDAs), cellu-
lar phones, cordless phones, base stations, and
notebook computers.
Other features include an active-low open-drain reset
output that indicates when the output is out of regula-
tion, a 0.1µA shutdown, short-circuit protection, and
thermal shutdown protection. The device is available in
a miniature 800mW 6-pin SOT23 package.
Applications
Notebook Computers
Cellular and Cordless Telephones
Personal Digital Assistants (PDAs)
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
♦ Guaranteed 500mA Output Current
♦ Low 120mV Dropout at 500mA
♦ ±1% Output Voltage Accuracy
Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V, 5V
Adjustable from 1.25V to 5.0V
♦ Power OK Output
♦ Low 125µA Ground Current
♦ 0.1µA Shutdown Current
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Tiny 800mW 6-Pin SOT23 Package
MAX1818
500mA Low-Dropout
Linear Regulator in SOT23
________________________________________________________________
Maxim Integrated Products
1
19-1860; Rev 2; 6/08
Ordering Information
*
Insert the desired two-digit suffix (see Selector Guide) into the
blanks to complete the part number.
PART* TEMP RANGE PIN-PACKAGE
MAX1818EUT_ _-T -40°C to +85°C 6 SOT23
MAX1818EUT_ _#T -40°C to +85°C 6 SOT23
Typical Operating Circuit
NC
MAX1818
IN
ON
OFF
C
IN
1μF
SHDN
OUT
POK
GNDSET
C
OUT
3.3μF
V
OUT
TO
μC
V
IN
= 2.5V TO 5.5V
R
POK
100k
Pin Configuration
POK
GNDSHDN
16OUT
5 SET
IN
MAX1818
SOT23
TOP VIEW
2
34
Note
:
The MAX1818 requires a special solder temperature
profile described in the Absolute Maximum Ratings section.
T = Tape and reel.
#
Denotes an RoHS-compliant package.
Selector Guide appears at end of data sheet.
MAX1818
500mA Low-Dropout
Linear Regulator in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT
+ 500mV or V
IN
= +2.5V, whichever is greater; SHDN = IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 3)
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, SHDN, POK, SET to GND ...................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration ...............................................1min
Continuous Power Dissipation (T
A
= +70°C) (Note 1)
6-Pin SOT23 (derate 10mW/°C above +70°C)..............800mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) (Note 2) ...................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.5 5.5 V
Input Undervoltage Lock-Out V
UVLO
Rising, 75mV hysteresis 2.0 2.15 2.3 V
I
OUT
= 100mA, T
A
= +25°C, V
OUT
≥ 2.0V -1 +1
I
OUT
= 100mA, V
OUT
< 2.0V -1.5 +1.5
I
OUT
= 100mA, T
A
= -40°C to +85°C -2.5 +2.5
Output Voltage Accuracy
(Preset Mode)
V
OUT
I
OUT
= 1mA to 500mA, V
IN
> V
OUT
+ 0.5V,
T
A
= -40°C to +85°C
-3 +3
%
Adjustable Output Voltage
Range
1.25 5 V
T
A
= 0°C to +85°C 1.225 1.250 1.275
SET Voltage Threshold
(Adjustable Mode)
V
SET
V
IN
= 2.7V,
I
OUT
= 100mA,
V
OUT
set to 2.0V
T
A
= -40°C to +85°C 1.213 1.288
V
Guaranteed Output Current
(RMS)
I
OUT
V
IN
≥ 2.7V 500 mA
Short-Circuit Current Limit I
LIM
V
OUT
= 0, V
IN
≥ 2.7V 0.55 0.8 1.8 A
In-Regulation Current Limit V
OUT
> 96% of nominal value, V
IN
≥ 2.7V 1.6 A
SET Dual Mode™ Threshold 50 100 150 mV
SET Input Bias Current I
SET
V
SET
= 1.25V -100 +100 nA
I
OUT
= 100µA 125 250
Ground-Pin Current I
Q
I
OUT
= 500mA 140
µA
V
OUT
= 5V 100 220
V
OUT
= 3.3V 120 215
Dropout Voltage (Note 4) V
IN
- V
OUT
I
OUT
= 500mA
V
OUT
= 2.5V 210 360
mV
Line Regulation ΔV
LNR
V
IN
from (V
OUT
+ 100mV) to 5.5V,
I
LOAD
= 5mA
-0.15 0 +0.15 %/V
Dual Mode is a trademark of Maxim Integrated Products
Note 1: Thermal properties are specified with product mounted on PC board with one square-inch of copper area and still air. With
minimal copper, the SOT23 package dissipates 712mW at +70°C. With a quarter square inch of copper, it will dissipate
790mW at +70°C. Copper should be equally shared between the IN, OUT, and GND pins.
Note 2: This device is constructed using a unique set of packaging techniques that imposes a limit on the thermal profile to which
the device can be exposed during board-level solder attach and rework. The limit permits only the use of the solder profiles
recommended in the industry standard specification, IPC JEDEC-J-STD-020A, paragraph 7.6, Table 3 for the IR/VPR and
convection reflow. Preheating is required. Hand or wave soldering is not allowed.
MAX1818
500mA Low-Dropout
Linear Regulator in SOT23
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT
+ 500mV or V
IN
= +2.5V, whichever is greater; SHDN = IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 3)
Note 3: All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design.
Note 4: The Dropout Voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
measured for V
IN
= V
OUT(NOM)
+ 500mV. Since the minimum input voltage is 2.5V, this specification is only meaningful when V
OUT(NOM)
> 2.5V. For
V
OUT(NOM)
between 2.5V and 3.5V, use the following equations: Typical Dropout = -93mV/V
✕
V
OUT(NOM)
+ 445mV;
Guaranteed Maximum Dropout = -137mV/V
✕
V
OUT(NOM)
+7004mV. For V
OUT(NOM)
> 3.5V, Typical Dropout = 120mV;
Maximum Dropout = 220mV.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation ΔV
LDR
I
OUT
= 1mA to 500mA 0.4 1.0 %
Output Voltage Noise 10Hz to 1MHz, C
OUT
= 3.3µF (ESR < 0.1Ω) 115 µV
RMS
SHUTDOWN
Shutdown Supply Current I
OFF
SHDN = GND, V
IN
= 5.5V
0.1 15 µA
V
IH
2.5V < V
IN
< 5.5V 1.6
SHDN Input Threshold
V
IL
2.5V < V
IN
< 5.5V 0.6
V
SHDN = IN or GND, T
A
= +25°C 1 25
SHDN Input Bias Current I
SHDN
T
A
= +85°C 5
nA
POK OUTPUT
POK Output Low Voltage V
OL
POK sinking 1mA 0.01 0.1 V
Operating Voltage Range for
Valid POK
POK sinking 100µA 1.0 5.5 V
POK = 5.5V, T
A
= +25°C 1 25
POK Output High Leakage
Current
T
A
= +85°C 5
nA
POK Threshold Rising edge, referred to V
OUT(NOMINAL)
90 93 96 %
THERMAL PROTECTION
Thermal Shutdown Temperature T
SHDN
170 °C
Thermal Shutdown Hysteresis ΔT
SHDN
20 °C
Typical Operating Characteristics
(V
IN
= (V
OUT
+ 500mV) or +2.5V, whichever is greater; SHDN = IN, C
IN
= 1µF, C
OUT
= 3.3µF, T
A
= +25°C, unless otherwise noted.)
0
50
25
125
100
75
150
175
225
200
250
0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
GROUND PIN CURRENT
vs. INPUT VOLTAGE
MAX1818 toc01
INPUT VOLTAGE (V)
GROUND PIN CURRENT (μA)
I
LOAD
= 150mA
3.3V OUTPUT
2.5V OUTPUT
1.8V OUTPUT
40
70
55
85
130
145
115
100
160
0 0.2 0.3 0.4 0.50.1 0.6 0.7 0.8 0.9 1.0
MAX1818 toc02
LOAD CURRENT (A)
GROUND PIN CURRENT (μA)
GROUND PIN CURRENT
vs. LOAD CURRENT
3.3V OUTPUT
2.5V OUTPUT
1.8V OUTPUT
110
130
120
150
140
160
170
-40 10-15 35 60 85
MAX1818 toc03
TEMPERATURE (°C)
GROUND PIN CURRENT (μA)
GROUND PIN CURRENT
vs. TEMPERATURE
1.5V OUTPUT
5.0V OUTPUT
I
LOAD
= 150mA
P1-P3P4-P6P7-P9

MAX1818EUT25#TG16

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Buy MAX1818EUT25#TG16
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 500mA
Lifecycle:
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