MAX1935ETA+-MAX1935ETA+T-MAX1935ETA-T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1935ETA+T ,500mA, Low-Voltage Linear Regulator in Tiny QFNApplications 8 Thin QFNMAX1935ETA* -40°C to +85°CNotebook Computers3mm x 3mmCellular and Cordless T ..
MAX1935ETA+T ,500mA, Low-Voltage Linear Regulator in Tiny QFNFeaturesThe MAX1935 low-dropout linear regulator operates♦ Guaranteed 500mA Output Currentfrom a 2. ..
MAX1935ETA-T ,500mA, Low-Voltage Linear Regulator in Tiny QFNELECTRICAL CHARACTERISTICS (continued)(V = V + 500mV or V = 2.25V whichever is greater, SET = GND, ..
MAX1937EEI ,Two-Phase Desktop CPU Core Supply Controllers with Controlled VID ChangeFeaturesThe MAX1937/MAX1938/MAX1939 comprise a family of ±0.75% Output Voltage Accuracysynchronou ..
MAX1937EEI ,Two-Phase Desktop CPU Core Supply Controllers with Controlled VID ChangeELECTRICAL CHARACTERISTICS(V = 12V, V = V = 5V, PGND = GNDS = GND = 0, VID_ = GND, C = 47pF, C = 0. ..
MAX1937EEI+ ,Two-Phase Desktop CPU Core Supply Controllers with Controlled VID ChangeFeaturesThe MAX1937/MAX1938/MAX1939 comprise a family of ♦ ±0.75% Output Voltage Accuracysynchronou ..
MAX489EPD ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX489EPD+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:EMI and reduce reflections caused by improperly termi-MAX3460–MAX3464: +5V, Fail-Safe, ..
MAX489ESD ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX148719-0122; Rev 5; 2/96Low-Power, Slew-Rate-LimitedRS-485/RS ..
MAX489ESD ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversApplications ______________Ordering InformationLow-Power RS-485 TransceiversPART TEMP. RANGE PIN-PA ..
MAX489ESD+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX489ESD+T ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:MAX491E, and MAX1487E are low-power transceivers forMAX3430: ±80V Fault-Protected, Fai ..

MAX1935ETA+-MAX1935ETA+T-MAX1935ETA-T
500mA, Low-Voltage Linear Regulator in Tiny QFN
General Description
The MAX1935 low-dropout linear regulator operates
from a 2.25V to 5.5V supply and delivers a guaranteed
500mA load current with low 175mV dropout. The high-
accuracy (±1.5%) output voltage is preset at an inter-
nally trimmed voltage or can be adjusted from 0.8V to
4.5V with an external resistive-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 MAX1935 comes in a
tiny 1.9W, 8-pin 3mm x 3mm thin QFN 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±1.5% Output Voltage Accuracy
Preset at 1.5V
Adjustable from 0.8V to 4.5VPower-OK OutputLow 210µA Ground Current 0.02µA Shutdown CurrentThermal-Overload ProtectionOutput Current LimitTiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
OUT
OUT
SET
GNDSHDN
POK
MAX1935
THIN QFN
3mm x 3mm
TOP VIEW
Pin Configuration
Ordering Information
OUT
SET
GND
SHDN
POK
COUT
10μF
VOUT
0.8V TO 4.5V
CIN
1μF
OFF
MAX1935
TO μC
RPOK
100kΩ
VIN
2.25V TO 5.5V
Typical Operating Circuit
19-2599; Rev 0; 10/02
PARTT EM P R A N G EPIN-PACKAGE
MAX1935ETA*-40°C to +85°C8 Thin QFN
3mm x 3mm
MAX1935ETA15*-40°C to +85°C8 Thin QFN
3mm x 3mm
Selector Guide
PARTO U T PU T
VO L T A G ETOP MARK
MAX1935ETAAdjustableADB
MAX1935ETA151.5VADB
*Contact factory for preset output voltages.
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
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 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, 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 Thin QFN (derate 24.4mW/°C above +70°C).......1.95W
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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input VoltageVIN2.255.50V
Input Undervoltage LockoutVUVLORising, 40mV hysteresis1.8522.15V
TA = +25°C, IOUT = 100mA-1.5+1.5
TA = +25°C, IOUT = 1mA to 500mA-2.5+2.5Output 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 = +25°C, IOUT = 100mA788812
TA = +25°C, IOUT = 1mA to 500mA780820SET 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 = 0V60014002300mA
SET Dual Mode™ Threshold3580125mV
SET Input Bias CurrentISETVSET = 0.8V-100+100nA
IOUT = 1mA210600Ground-Pin CurrentIQIOUT = 500mA575µA
VOUT = 2.25V259400
VOUT = 2.8V201350Dropout Voltage (Note 1)IOUT = 500mA
VOUT = 4V147275
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
SHUTDOWN
Shutdown Supply CurrentIOFFS HDN = GND, VIN = 5.5V0.025µA
VIH1.6S HDN Input ThresholdVIL0.6VHDN Input Bias CurrentI SHDNS HDN = GND or IN10100nA
Startup TimetSTARTC OUT = 10µF, ti m e fr om S HDN hig h to P OK hig h40µs
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
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 otherwise
noted. 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 otherwise
noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input VoltageVIN2.255.50V
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 = 0V6002500mA
SET Dual Mode Threshold35125mV
SET Input Bias CurrentISETVSET = 0.8V-100+100nA
Ground-Pin CurrentIQIOUT = 1mA400µA
SHUTDOWN
Shutdown Supply CurrentIOFFS HDN = GND, VIN = 5.5V5µA
VIH2.5V < VIN < 5.5V1.6S HDN Input ThresholdVIL2.5V < VIN < 5.5V0.6VHDN Input Bias CurrentI SHDNS HDN = GND or IN100nA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER-OK
POK 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 PROTECTION
Ther m al- S hutd own Tem p eratureTSHDN170°C
Thermal-Shutdown HysteresisΔTSHDN20°C
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
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 otherwise
noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER-OK
POK 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≤4V, dropout voltage limits are linearly interpolated from the values listed. For VOUT< 4V, dropout
voltage limit is equal to the value for VOUT= 4V.
Note 2:Specifications to -40°C are guaranteed by design, not production tested.ypical Operating Characteristics
(VOUT= 3.3V, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1935 toc01
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
IOUT = 0mA
IOUT = 500mA
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX1935 toc02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE vs. TEMPERATURE
MAX1935 toc03
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
VIN = VOUT + 500mV
IOUT = 0
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX1935 toc04
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
DROPOUT VOLTAGE
vs. OUTPUT VOLTAGE
MAX1935 toc05
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (V)
GROUND-PIN CURRENT
vs. INPUT VOLTAGE
MAX1935 toc06
INPUT VOLTAGE (V)
GROUND-PIN CURRENT (
IOUT = 0mA
IOUT = 500mA
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
Typical Operating Characteristics (continued)
(VOUT= 3.3V, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
GROUND-PIN CURRENT
vs. LOAD CURRENT
MAX1935 toc07
LOAD CURRENT (mA)
GROUND-PIN CURRENT (VIN = 5.5V
VIN = 3.8V
GROUND-PIN CURRENT
vs. TEMPERATURE
MAX1935 toc08
TEMPERATURE (°C)
GROUND-PIN CURRENT (
VIN = VOUT + 500mV
IOUT = 0
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX1935 toc09
FREQUENCY (kHz)
PSRR (dB)
COUT = 10μF
IOUT = 50mA
OUTPUT SPECTRAL NOISE DENSITY
vs. FREQUENCY
MAX1935 toc10
FREQUENCY (kHz)
OUTPUT SPECTRAL NOISE DENSITY (
Hz)
COUT = 10μF
IOUT = 50mA
OUTPUT NOISE DC TO 1MHz
MAX1935 toc11
20ms/div
VOUT
1mV/div
VOUT = 3.3V
ROUT = 66Ω (50mA)
REGION OF STABLE COUT ESR
vs. LOAD CURRENT
MAX1935 toc12
FREQUENCY (kHz)
REGION OF C
OUT
ESR
COUT = 10μF
STABLE REGION
LOAD-TRANSIENT RESPONSE
MAX1935 toc13
10μs/div
IOUT
200mA/div
VOUT
20mV/div
VIN = VOUT + 500mV
CIN = 10μF
ROUT = 660Ω TO 6.6Ω (5mA TO 500mA)
MAX1935
500mA, Low-Voltage Linear Regulator
in Tiny QFN
Pin Description
PINNAMEFUNCTION
1, 2INRegulator Input. Supply voltage can range from 2.25V to 5.5V. Bypass with a 1µF capacitor to GND (see
the Capacitor Selection and Regulation Stability section). 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 RESPONSE
MAX1935 toc15
200μs/div
VIN
1V/div
VOUT
10mV/div
SHUTDOWN WAVEFORM
MAX1935 toc16
20μs/div
VOUT
1V/div
ROUT = 6.6Ω (500mA)
VSHDN
1V/div
Typical Operating Characteristics (continued)
(VOUT= 3.3V, VIN= VOUT+ 500mV, SHDN= IN, CIN= 1µF, COUT= 10µF, TA= +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
MAX1935 toc14
10μs/div
IOUT
200mA/div
VOUT
50mV/divVIN = VOUT + 100mV
CIN = 10μF
ROUT = 660Ω TO
6.6Ω (5mA TO 500mA)
POK WAVEFORM
MAX1935 toc17
200μs/div
VIN
2V/div
VOUT
2V/div
VPOK
2V/div
ROUT = 66Ω (50mA)

Partno	Mfg	Dc	Qty	Available	Descript
MAX1935ETA+ \|MAX1935ETA	MAXIM	N/a	2384	avai	500mA, Low-Voltage Linear Regulator in Tiny QFN
MAX1935ETA+T \|MAX1935ETAT	MAXIM	N/a	20000	avai	500mA, Low-Voltage Linear Regulator in Tiny QFN
MAX1935ETA+T \|MAX1935ETAT	MAX	N/a	1098	avai	500mA, Low-Voltage Linear Regulator in Tiny QFN
MAX1935ETA-T \|MAX1935ETAT	MAXIM	N/a	5000	avai	500mA, Low-Voltage Linear Regulator in Tiny QFN