MAX1806EUA18+T ,500mA, Low-Voltage Linear Regulator in µMAXFeaturesThe MAX1806 low-dropout linear regulator operates♦ Guaranteed 500mA Output Currentfrom a +2 ..
MAX1806EUA25 ,500mA, Low-Voltage Linear Regulator in UMAXFeaturesThe MAX1806 low-dropout linear regulator operates Guaranteed 500mA Output Currentfrom a +2 ..
MAX1806EUA25 ,500mA, Low-Voltage Linear Regulator in UMAXELECTRICAL CHARACTERISTICS (continued)(V = V + 500mV or V = +2.25V whichever is greater, SET = GND, ..
MAX1806EUA25+ ,500mA, Low-Voltage Linear Regulator in µMAXMAX180619-2018; Rev 0; 4/01500mA, Low-Voltage Linear Regulator in µMAX
MAX1806EUA33 ,500mA, Low-Voltage Linear Regulator in UMAXFeaturesThe MAX1806 low-dropout linear regulator operates Guaranteed 500mA Output Currentfrom a +2 ..
MAX1806EUA33+ ,500mA, Low-Voltage Linear Regulator in µMAXELECTRICAL CHARACTERISTICS (continued)(V = V + 500mV or V = +2.25V whichever is greater, SET = GND, ..
MAX4662CWE ,2.5W / Quad / SPST / CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, V = +5V, V = +2.4V, V = +0.8V, T = T ..
MAX4662EAE ,2.5W / Quad / SPST / CMOS Analog Switchesapplications where current♦ Guaranteed Break-Before-Make (MAX4663)switching is required. They have ..
MAX4662EAE+ ,2.5 Ohm Quad, SPST, CMOS Analog SwitchesFeaturesThe MAX4661/MAX4662/MAX4663 quad analog switches♦ Low On-Resistance (2.5W max)feature low o ..
MAX4662EAE+T ,2.5 Ohm Quad, SPST, CMOS Analog SwitchesMAX4661/MAX4662/MAX466319-1516; Rev 0; 7/992.5W , Quad, SPST, CMOS Analog Switches
MAX4662EPE+ ,2.5 Ohm Quad, SPST, CMOS Analog SwitchesApplicationsMAX4661CWE 0°C to +70°C 16 Wide SOReed Relay Replacement AvionicsMAX4661CPE 0°C to +70° ..
MAX4663CAE ,2.5W / Quad / SPST / CMOS Analog SwitchesFeaturesThe MAX4661/MAX4662/MAX4663 quad analog switches♦ Low On-Resistance (2.5W max)feature low o ..
MAX1806EUA08+T-MAX1806EUA15+-MAX1806EUA15+T-MAX1806EUA18+-MAX1806EUA18+T-MAX1806EUA25+-MAX1806EUA33+-MAX1806EUA33+T
500mA, Low-Voltage Linear Regulator in µMAX
General DescriptionThe MAX1806 low-dropout linear regulator operates
from a +2.25V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 175mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed voltage (see Selector Guide) or can
be adjusted from +0.8V to +4.5V with an external resis-
tive-divider.
An internal PMOS pass transistor allows low 210µA
supply current, making this device ideal for portable
equipment such as personal digital assistants (PDAs),
cellular phones, cordless phones, and other equip-
ment, including base stations and docking stations.
Other features include an active-low, power-OK output
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and
thermal shutdown protection. The MAX1806 comes in a
miniature 1.3W, 8-pin power-µMAX package with a
metal pad on the underside of the package.
Applications Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
FeaturesGuaranteed 500mA Output CurrentOutput Down to 0.8VLow 175mV Dropout at 500mA±1% Output Voltage Accuracy
Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
Adjustable from 0.8V to 4.5VPower-OK OutputLow 210µA Ground Current 0.02µA Shutdown CurrentThermal Overload ProtectionOutput Current LimitTiny 1.3W, 8-Pin Power-µMAX Package
MAX1806
500mA, Low-Voltage Linear Regulator in µMAXSET
GNDSHDN
OUT
OUTIN
POK
µMAXTOP VIEW
MAX1806
Pin Configuration
Ordering InformationMAX1806
CIN
1μF
COUT
10μF
RPOK
100kΩ
VIN
+2.25V TO +5.5V
OFF
SHDN
OUT
VOUT
0.8V TO 4.5V
POK
GNDSET
TO
Typical Operating Circuit19-2018; Rev 0; 4/01
PARTT EM P. R A N G EPIN-PACKAGE
MAX1806EUA_ _-40°C to +85°C8 Power-μMAX
Selector Guide
PART AND SUFFIXVOUT (V)TOP MARKMAX1806EUA333.3AAAG
MAX1806EUA252.5AAAH
MAX1806EUA181.8AAAI
MAX1806EUA151.5AAAJ
MAX1806EUA080.8AAAK
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VIN= VOUT(SETPOINT)+ 500mV or VIN= +2.25V whichever is greater, SET = GND, SHDN= IN, TA
= 0°C to +85°C, unless otherwisenoted. Typical values are at TA= +25°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.
IN, SHDN, POK, SET to GND...................................-0.3V to +6V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin Power-µMAX (derate 17mW/°C above +70°C).......1.3W
Operating Temperature.......................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSInput VoltageVIN2.255.5V
Input Undervoltage LockoutVUVLORising, 40mV hysteresis1.852.02.15V
TA = +85°C, IOUT = 100mA-1+1
TA = +85°C, IOUT = 1mA to 500mA-1.5+1.5Output Voltage Accuracy
(Preset Mode)VOUT
TA = 0°C to +85°C, IOUT = 1mA to 500mA,
VIN > VOUT + 0.5V-3+3
Adjustable Output Voltage0.84.5V
TA = +85°C, IOUT = 100mA790810
TA = +85°C, IOUT = 1mA to 500mA786814SET Voltage Threshold
(Adjustable Mode)VSET
TA = 0°C to +85°C, IOUT = 1mA to 500mA,
VIN > VOUT + 0.5V774800826
Maximum Output CurrentIOUT500m ARM S
Short-Circuit Current LimitILIMVOUT = 0V70014002300mA
SET Dual Mode™ Threshold3580125mV
SET Input Bias CurrentISETVSET = +0.8V-100+100nA
IOUT = 1mA210400Ground-Pin CurrentIQIOUT = 500mA575µA
VOUT = +2.25V259384
VOUT = +2.8V201315Dropout Voltage (Note 1)IOUT = 500mA
VOUT = +4.0V147255
Line RegulationΔVLNRV I N fr om ( V OU T + 100m V ) to 5.5V , IL OA D = 5m A00.125%/V
Load RegulationΔVLDRIOUT = 1mA to 500mA15.535p p m /m A
Output Voltage Noise10Hz to 1MHz, COUT = 10µF (ESR < 0.1Ω)300µVRMS
SHUTDOWNShutdown Supply CurrentIOFFSHDN = GND, VIN = 5.5V0.025µA
VIH1.6SHDN Input ThresholdVIL0.6V
SHDN Input Bias CurrentI SHDNSHDN = GND or IN10100nA
Startup TimeTSTARTC OUT = 10µF, ti m e fr om SHDN hig h to P OK hig h40µs
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
ELECTRICAL CHARACTERISTICS (continued)(VIN= VOUT(SETPOINT)+ 500mV or VIN= +2.25V whichever is greater, SET = GND, SHDN= IN, TA
= 0°C to +85°C, unless otherwisenoted. Typical values are at TA= +25°C.)
ELECTRICAL CHARACTERISTICS(VIN= VOUT(SETPOINT)+ 500mV or VIN= +2.25V whichever is greater, SET = GND, SHDN= IN, TA
= -40°C to +85°C, unless other-wise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSInput VoltageVIN2.255.5V
Input Undervoltage LockoutVUVLORising, 40mV hysteresis1.852.15V
Output Voltage Accuracy
(Preset Mode)VOUTIOUT = 1mA to 500mA-4+4%
Adjustable Output Voltage0.84.5V
SET Voltage Threshold
(Adjustable Mode)VSETIOUT = 1mA to 500mA766834mV
Maximum Output CurrentIOUT500m ARM S
Short-Circuit Current LimitILIMVOUT = 0V7002500mA
SET Dual Mode™ Threshold35125mV
SET Input Bias CurrentISETVSET = +0.8V-100+100nA
Ground-Pin CurrentIQIOUT = 1mA400µA
VOUT = +2.25V259384
VOUT = +2.8V201315Dropout Voltage (Note 1)IOUT = 500mA
VOUT = +4.0V147255
Line RegulationΔVLNRV I N fr om ( V OU T + 100m V ) to 5.5V , IL OA D = 5m A-0.175+0.175%/V
Load RegulationΔVLDRIOUT = 1mA to 500mA35p p m /m A
SHUTDOWNShutdown Supply CurrentIOFFSHDN = GND, VIN = 5.5V5µA
VIH2.5V < VIN < 5.5V1.6SHDN Input ThresholdVIL2.5V < VIN < 5.5V0.6V
SHDN Input Bias CurrentI SHDNSHDN = GND or IN100nA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER-OKPOK Output Low VoltageVOLSinking 2mA550mV
Operating Voltage Range for
Valid POK OutputSinking 100µA1.05.5V
Output High-Leakage CurrentVPOK = +5.5V100nA
ThresholdRising edge, referred to VOUT(NOMINAL)909396%
THERMAL PROTECTIONTher m al S hutd own Tem p eratureTSHDN170°C
Thermal Shutdown HysteresisΔTSHDN20°C
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
ELECTRICAL CHARACTERISTICS (continued)(VIN= VOUT(SETPOINT)+ 500mV or VIN= +2.25V whichever is greater, SET = GND, SHDN= IN, TA
= -40°C to +85°C, unless other-wise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER-OKPOK Output Low VoltageVOLSinking 2mA50mV
Operating Voltage Range for
Valid POK OutputSinking 100µA1.05.5V
Output High-Leakage CurrentVPOK = +5.5V100nA
ThresholdRising edge, referred to VOUT(NOMINAL)8997%
Note 1:Dropout voltage is defined as VIN- VOUT, when VOUTis 100mV below the value of VOUTand when VIN= VOUT(NOM)+0.5V.
For 2.25V ≤VOUT≤4.0V, dropout voltage limits are linearly interpolated from the values listed. For VOUT< 4.0V, dropout
voltage limit is equal to the value for VOUT= 4.0V.
Note 2:Specifications to -40°C are guaranteed by design, not production tested.
ypical Operating Characteristics(MAX1806EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1806 toc01
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
IOUT = 0mA
IOUT = 500mA
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX1806 toc02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE vs. TEMPERATURE
MAX1806 toc03
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
VIN = VOUT + 500mV
IOUT = 0
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX1806 toc04
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
DROPOUT VOLTAGE vs.
OUTPUT VOLTAGE
MAX1806 toc05
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (V)
GROUND-PIN CURRENT vs.
INPUT VOLTAGE
MAX1806 toc06
INPUT VOLTAGE (V)
GROUND-PIN CURRENT (
IOUT = 0mA
IOUT = 500mA
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
Typical Operating Characteristics (continued) (MAX1806EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
GROUND-PIN CURRENT vs.
LOAD CURRENT
MAX1806 toc07
LOAD CURRENT (A)
GROUND-PIN CURRENT (VIN = 5.5V
VIN = 3.8V
GROUND-PIN CURRENT vs.
TEMPERATURE
MAX1806 toc08
TEMPERATURE (°C)
GROUND-PIN CURRENT (
VIN = VOUT + 500mV
IOUT = 0
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX1806 toc09
FREQUENCY (kHz)
PSRR (dB)
COUT = 10μF
IOUT = 50mA
OUTPUT SPECTRAL NOISE DENSITY
vs. FREQUENCY
MAX1806 toc10
FREQUENCY (kHz)
OUTPUT SPECTRAL NOISE DENSITY (
Hz)
COUT = 10μF
IOUT = 50mA
OUTPUT NOISE DC TO 1MHzMAX1806 toc11
20ms/div
VOUT
1mV/div
VOUT = 3.3V
ROUT = 66Ω (50mA)
REGION OF STABLE COUT ESR
vs. LOAD CURRENT
MAX1806 toc12
FREQUENCY (kHz)
REGION OF C
OUT
ESR
COUT = 10μF
STABLE REGION
LOAD-TRANSIENT RESPONSEMAX1806 toc13
10μs/div
IOUT
200mA/div
VOUT
20mV/div
VIN = VOUT + 500mV
CIN = 10μF
ROUT = 660Ω TO 6.6Ω (5mA TO 500mA)
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
Pin Description
PINNAMEFUNCTION1, 2INRegulator Input. Supply voltage can range from +2.25V to +5.5V. Bypass with a 1μF capacitor to GND (see
Capacitor Selection and Regulation Stability). Connect both input pins together externally.POKOpen-Drain, Active-Low Power-OK Output. POK remains low while the output voltage (VOUT) is below the
POK threshold. Connect a 100kΩ pullup resistor from POK to OUT.SHDNActive-Low Shutdown Input. A logic low at SHDN reduces supply current to 0.02μA. In shutdown, the POK
output is low. Connect SHDN to IN for normal operation.GNDGround. This pin and the exposed pad also function as a heatsink. Solder both to a large pad or to the
circuit-board ground plane to maximize power dissipation.SETVoltage-Setting Input. Connect SET to GND for preset output. Connect an external resistive voltage-divider
from OUT to SET to set the output voltage between 0.8V and 4.5V. The SET regulation voltage is 800mV.
7, 8OUTRegulator Output. OUT sources up to 500mA. Bypass OUT with a 10μF low-ESR capacitor to GND.
Connect both OUT pins together externally.
LINE-TRANSIENT RESPONSEMAX1806 toc15
200μs/div
VIN
1V/div
VOUT
10mV/div
SHUTDOWN WAVEFORMMAX1806 toc16
20μs/div
VOUT
1V/div
ROUT = 6.6Ω (500mA)
VSHDN
1V/div
Typical Operating Characteristics (continued) (MAX1806EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
NEAR DROPOUTMAX1806 toc14
10μs/div
IOUT
200mA/div
VOUT
50mV/div
VIN = VOUT + 100mV
CIN = 10μF
ROUT = 660Ω TO
6.6Ω (5mA TO 500mA)
POK WAVEFORMMAX1806 toc17
200μs/div
VIN
2V/div
VOUT
2V/div
VPOK
2V/div
ROUT = 66Ω (50mA)
