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MAX1792EUA18+ |MAX1792EUA18MAXN/a1008avai500mA, Low-Dropout Linear Regulator in µMAX
MAX1792EUA25+TMAXIMN/a286avai500mA, Low-Dropout Linear Regulator in µMAX
MAX1792EUA33+TMAXIMN/a848avai500mA, Low-Dropout Linear Regulator in µMAX
MAX1792EUA33-T |MAX1792EUA33TMAXN/a524avai500mA, Low-Dropout Linear Regulator in µMAX
MAX1792EUA33-T |MAX1792EUA33TMAXIMN/a772avai500mA, Low-Dropout Linear Regulator in µMAX
MAX1792EUA50+T |MAX1792EUA50TMAXIMN/a2436avai500mA, Low-Dropout Linear Regulator in µMAX


MAX1792EUA50+T ,500mA, Low-Dropout Linear Regulator in µMAXfeatures include an active-low open-drain resetoutput with a 4ms timeout period that indicates when ..
MAX1793 ,Low-Dropout, Low-IApplicationsMAX1793EUE-50 -40 °C to +85 °C 16 TSSOP-EP* 5.0 or AdjNotebook ComputersMAX1793EUE-33 ..
MAX1793EUE15 ,Low-Dropout, Low IQ, 1A Linear RegulatorApplications RANGE PACKAGEMAX1793EUE-50 -40°C to +85°C 16 TSSOP-EP* 5.0 or AdjNotebook ComputersMAX ..
MAX1793EUE18+ ,Low-Dropout, Low-IQ, 1A Linear RegulatorFeaturesThe MAX1793 low-dropout linear regulator (LDO) oper-♦ Guaranteed 1A Output Currentates from ..
MAX1793EUE18+T ,Low-Dropout, Low-IQ, 1A Linear RegulatorFeaturesThe MAX1793 low-dropout linear regulator (LDO) oper-♦ Guaranteed 1A Output Currentates from ..
MAX1793EUE18-T ,Low-Dropout, Low-IQ, 1A Linear RegulatorELECTRICAL CHARACTERISTICS (continued)(V = V + 0.5V or V = 2.5V (whichever is greater), SHDN = IN, ..
MAX4628EUT+T ,0.5Ω, Low-Voltage, Single-Supply SPST Analog SwitchesMAX4626/MAX4627/MAX462819-1633; Rev 0; 1/000.5Ω, Low-Voltage, Single-SupplySPST Analog Switches
MAX4630ESD+ ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog SwitchesApplicationsBattery-Powered SystemsPin Configurations/FunctionalAudio and Video Signal RoutingDiagr ..
MAX4630EUD ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—SINGLE +5V SUPPLY(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T = T to T un ..
MAX4631CSE ,Fault-Protected, High-Voltage, Dual Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, V = 0.8V, V = 2.4V, T = T to T , unl ..
MAX4631ESE+ ,Fault-Protected, High-Voltage, Dual Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, V = 0.8V, V = 2.4V, T = T to T , unl ..
MAX4632CSE+ ,Fault-Protected, High-Voltage, Dual Analog SwitchesApplicationsMAX4631CPE 0°C to +70°C 16 Plastic DIPMAX4631ESE -40°C to +85°C 16 Narrow SOATE Equipme ..


MAX1792EUA18+-MAX1792EUA25+T-MAX1792EUA33+T-MAX1792EUA33-T-MAX1792EUA50+T
500mA, Low-Dropout Linear Regulator in µMAX
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
General Description

The MAX1792 low-dropout linear regulator operates
from a +2.5V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 130mV 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 80µA
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 with a 4ms timeout period that indicates when
the output is out of regulation, a 0.1µA shutdown mode,
short-circuit protection, and thermal shutdown protec-
tion. The device is available in a miniature 1.3W, 8-pin
power-µMAX package with a metal pad on the under-
side of the package.
________________________Applications

Notebook Computers
Cellular and Cordless Telephones
Personal Digital Assistants (PDAs)
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
Guaranteed 500mA Output CurrentLow 130mV Dropout at 500mAUp to ±1% Output Voltage Accuracy
Preset at 1.5V, 1.8V, 2.5V, 3.3V, or 5.0V
Adjustable from 1.25V to 5.0V
Reset Output with 4ms Timeout PeriodLow 80µA Ground Current0.1µA Shutdown CurrentThermal Overload ProtectionOutput Current LimitTiny 1.3W Power-µMAX Package
POWER-µMAX

SET
GNDSHDN
OUT
OUTIN
RST
TOP VIEW
MAX1792
Pin Configuration

MAX1792
CIN
1µF
COUT
3.3µF
RRST
100k
VIN = +2.5V TO +5.5V
OFF
SHDN
OUTVOUT
OUT
RST
GNDSET
TO

Typical Operating Circuit
Ordering Information
Selector Guide
PART AND SUFFIXVOUTμMAX TOP MARK

MAX1792EUA15+ 1.5V or Adj. AAAE
MAX1792EUA18+ 1.8V or Adj. AAAA
MAX1792EUA25+ 2.5V or Adj. AAAB
MAX1792EUA33+ 3.3V or Adj. AAAC
MAX1792EUA50+ 5.0V or Adj. AAAD
MAX1792EUA33/V+ 3.3V or Adj. AACP
PART* TEMP RANGE PIN-PACKAGE

MAX1792EUA_ _+ -40°C to +85°C 8 Power-μMAX
MAX1792EUA_ _/V+ -40°C to +85°C 8 Power-μMAX
*Insert the desired two-digit suffix (see Selector Guide) into the
blanks to complete the part number.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Contact factory for other preset output voltages.
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VIN= VOUT(NOM)+ 500mV, or VIN= +2.5V (whichever is greater), SHDN= IN, TA= 0°C to +85°C, unless otherwise noted. 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, RST, SET to GND....................................-0.3V to +6V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Output Short-Circuit Duration........................................Indefinite
Continuous Power Dissipation (TA= +70°C)
8-Pin Power-µMAX (derate 17mW/°C above +70°C).......1.3W
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Voltage VIN 2.5 5.5 V
Input Undervoltage Lockout VUVLO Rising, 75mV hysteresis 2.0 2.15 2.3 V
Preset VOUT  2.5V -1 +1 IOUT = 100mA,
TA = +85°CPreset VOUT < 2.5V -1.5 +1.5 %
IOUT = 100mA, TA = 0°C to +85°C -2 +2 Output Voltage Accuracy
(Preset Mode) VOUT
IOUT = 1mA to 500mA, VIN > VOUT + 0.5V,
TA = 0°C to +85°C-3 +3 %
Adjustable Output Voltage
Range 1.25 5 V
TA = +85°C 1.229 1.250 1.271 SET Voltage Threshold
(Adjustable Mode) VSET
VIN = +2.7V,
VOUT set to 2.0V,
IOUT = 100mA TA = 0°C to +85°C 1.219 1.281
Maximum Output Current IOUT VIN 2.7V 500 mARMS
Short-Circuit Current Limit ILIM VOUT = 0V, VIN 2.7V 0.55 0.8 1.8 A
In-Regulation Current Limit VOUT > 96% of nominal value, VIN 2.7V 1.6 A
SET Dual Mode™ Threshold 50 100 150 mV
SET Input Bias Current ISET VSET = 1.25V -100 +100 nA
IOUT = 1mA 80 250 Ground-Pin Current IQIOUT = 500mA 110 μA
VOUT = 5.0V 120 225
VOUT = 3.3V 130 250 Dropout Voltage (Note 1) VIN -
VOUTIOUT = 500mA
VOUT = 2.5V 210360
mV
Line Regulation VLNRVIN from (VOUT + 100mV) to 5.5V,
ILOAD = 5mA -0.15 0 +0.15 %/V
Load Regulation VLDR IOUT = 1mA to 500mA 0.4 1.0 %
Output Voltage Noise 10Hz to 1MHz, COUT = 3.3μF (ESR < 0.1) 115 μVRMS
SHUTDOWN

Shutdown Supply Current IOFFSHDN = GND, VIN = 5.5V 0.1 15 μA
VIH 2.5V < VIN < 5.5V 1.6 SHDN Input Threshold VIL 2.5V < VIN < 5.5V 0.6 V
SHDN Input Bias Current SHDN = IN or GND 10 100 nA
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
ELECTRICAL CHARACTERISTICS

(VIN= VOUT(NOM)+ 500mV, or VIN= +2.5V (whichever is greater), SHDN= IN, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)

(VIN= VOUT(NOM)+ 500mV, or VIN= +2.5V (whichever is greater), SHDN= IN, TA= 0°C to +85°C, unless otherwise noted. Typical
values are at TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RESET OUTPUT

Reset Output Low Voltage VOLRST sinking 1mA 0.01 0.1 V
Operating Voltage Range for
Valid Reset RST sinking 100μA 1.0 5.5 V
RST Output High Leakage
Current VRST = +5.5V 100 nA
RST Threshold Rising edge, referred to VOUT(NOMINAL) 90 93 96 %
RST Release Delay tRP Rising edge of OUT to rising edge of RST 1.5 4.5 8 ms
THERMAL PROTECTION

Thermal Shutdown Temperature TSHDN 170 °C
Thermal Shutdown Hysteresis TSHDN 20 °C
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS

Input Voltage VIN 2.5 5.5 V
Input Undervoltage Lockout VUVLO Rising or falling 2.0 2.3 V
IOUT = 100mA -2 +2 Output Voltage Accuracy
(Preset Mode) VOUTIOUT = 1mA to 500mA -3 +3 %
Adjustable Output Voltage
Range 1.25 5 V
SET Voltage Threshold
(Adjustable Mode) VSET IOUT = 100mA 1.212 1.288 V
Maximum Output Current IOUT 500 mARMS
Short-Circuit Current Limit ILIM VOUT = 0V 0.55 1.8 A
SET Dual Mode Threshold 50 150 mV
SET Input Bias Current ISET VSET = 1.25V -100 +100 nA
Ground-Pin Current IQ IOUT = 1mA 250 μA
VOUT = 5.0V 225
VOUT = 3.3V 250 Dropout Voltage (Note 1) VIN-
VOUTIOUT = 500mA
VOUT = 2.5V 360mV
Line Regulation VLNRVIN from (VOUT + 100mV) to 5.5V,
ILOAD = 5mA -0.15 +0.15 %/V
Load Regulation VLDR IOUT = 1mA to 500mA 1.0 %
SHUTDOWN

Shutdown Supply Current IOFFSHDN = GND, VIN = +5.5V 15 μA
VIH 2.5V < VIN < 5.5V 1.6 SHDN Input
Threshold VIL 2.5V < VIN < 5.5V 0.6 V
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX

OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX1792-01
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
IOUT = 0A
IOUT = 500mA
OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX1792-02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1792-03
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
VIN = VOUT + 500mV
IOUT = 0A
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX1792-04
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = -40°C
TA = +25°C
GROUND-PIN CURRENT
vs. INPUT VOLTAGE
MAX1792-05
GROUND-PIN CURRENT (
IOUT = 500mA
IOUT = 0A
GROUND-PIN CURRENT
vs. LOAD CURRENT
MAX1792-06
GROUND-PIN CURRENT (
VIN = 5.5V
VIN = 3.8V
Typical Operating Characteristics

(MAX1792EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 3.3µF, TA= +25°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)

(VIN= VOUT(NOM)+ 500mV, or VIN= +2.5V (whichever is greater), SHDN= IN, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
Note 1:
Dropout voltage is defined as VIN- VOUT, when VOUTis 100mV below the value of VOUTmeasured when VIN = VOUT(NOM)
+ 0.5V. Since the minimum input voltage is 2.5V, this specification is only meaningful when VOUT(NOM)≥2.5V. For VOUT(NOM)
between 2.5V and 3.5V, use the following equations: Typical Dropout = -93mV/V ✕VOUT(NOM) + 445mV; Guaranteed Maximum
Dropout = -137mV/V ✕VOUT(NOM) + 704mV. For VOUT(NOM) ≥3.5V: Typical Dropout = 120mV; Guaranteed Maximum Dropout
= 225mV.
Note 2:
Specifications to -40°C are guaranteed by design, not production tested.
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
RESET OUTPUT

Reset Output Low Voltage VOLRST sinking 1mA 0.1 V
Operating Voltage Range for
Valid Reset RST sinking 100μA 1.0 5.5 V
RST Output High Leakage
Current VRST= +5.5V 100 nA
RST Threshold Rising edge, referred to VOUT(NOMINAL) 90 96 %
RST Release Delay tRP Rising edge of OUT to rising edge of RST 1.5 8 ms
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
OUTPUT NOISE DC TO 1MHz

MAX1792-10
20ms/div
VOUT
200μV/div
VOUT = 3.3V
ROUT = 66Ω (50mA)
REGION OF STABLE COUT ESR
vs. LOAD CURRENT
MAX1792-11
LOAD CURRENT (mA)
OUT
ESR (
STABLE REGION
COUT = 3.3μF
COUT = 10μF
LOAD-TRANSIENT RESPONSE

MAX1792-12
10μs/div
IOUT
500mA/div
VOUT
20mV/div
VIN = VOUT + 500mV
CIN = 10μF
ROUT = 660Ω TO 6.6Ω (5mA TO 500mA)
GROUND-PIN CURRENT
vs. TEMPERATURE
MAX1792-07
TEMPERATURE (°C)
GROUND-PIN CURRENT (
VIN = VOUT + 500 mV
IOUT = 0A
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX1792-08
FREQUENCY (kHz)
PSRR (dB)
COUT = 3.3μF
IOUT = 50mA
OUTPUT SPECTRAL NOISE DENSITY
vs. FREQUENCY
MAX1792-09
FREQUENCY (kHz)
OUTPUT SPECTRAL NOISE DENSITY (
Hz)
COUT = 3.3μF
IOUT = 50mA
Typical Operating Characteristics (continued)

(MAX1792EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 3.3µF, TA= +25°C, unless otherwise noted.)
MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
SHUTDOWN WAVEFORM

MAX1792-15
20μs/div
VSHDN
1V/div
VOUT
1V/div
ROUT = 6.6Ω (500mA)
RST WAVEFORM

MAX1792-16
20ms/div
VIN
2.5V/div
VOUT
2V/div
ROUT = 66Ω (50mA)
VRST
2V/div
Pin Description
LINE-TRANSIENT RESPONSE

MAX1792-14
100μs/div
VIN
1V/div
VOUT
10mV/div
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT

MAX1792-13
20μs/div
IOUT
500mA/div
VOUT
50mV/div
VIN = VOUT + 100mV
CIN = 10μF
ROUT = 660Ω TO 6.6Ω (5mA TO 500mA)
Typical Operating Characteristics (continued)

(MAX1792EUA33, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 3.3µF, TA= +25°C, unless otherwise noted.)
PINNAMEFUNCTION

1, 2INRegulator Input. Supply voltage can range from +2.5V to +5.5V. Bypass with a 1µF capacitor to GND (see
Capacitor Selection and Regulator Stability). Connect both input pins together externally.RST
Open-Drain Active-Low Reset Output. RST remains low while the output voltage (VOUT) is below the reset
threshold and for at least 4ms after VOUT rises above the reset threshold. Connect a 100kΩ pullup resistor
to OUT to obtain an output voltage.SHDNActive-Low Shutdown Input. A logic low reduces supply current to 0.1µA. In shutdown, the RST output is
low and OUT is pulled low through an internal 5kΩ resistor. Connect 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 to GND for preset output. Connect to a resistive divider between OUT and
GND to set the output voltage between 1.25V and 5.0V.
7, 8OUTRegulator Output. Sources up to 500mA. Bypass with a 3.3µF low-ESR capacitor to GND. Use a 4.7µF
capacitor for output voltages below 2V. Connect both output pins together externally.
—EPExposed Pad. Solder to ground plane to maximize thermal performance. Not internally connected to
ground.
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