MAX1776EUA+-MAX1776EUA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1776EUA+ ,24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down ConverterFeaturesThe MAX1776 high-efficiency step-down converter pro-♦ Fixed 5V or Adjustable Outputvides an ..
MAX1776EUA+T ,24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down ConverterELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = +12V, SHDN = IN, T = 0°C to +85°C, unless other ..
MAX1777EEI+ ,High-Efficiency, Quad Output, Main Power-Supply Controllers for Notebook Computersapplications. The MAX1999 provides a pin-selectableMAX1999EEI+ -40°C to +85°C 28 QSOP400kH z/500kH ..
MAX1778EUG ,Quad-Output TFT LCD DC-DC Converters with BufferELECTRICAL CHARACTERISTICS(V = +3.0V, SHDN = IN, V = V = V = V = 10V, LDOOUT = FBL, BUF- = BUFOUT, ..
MAX1778EUG ,Quad-Output TFT LCD DC-DC Converters with BufferFeaturesThe MAX1778/MAX1880–MAX1885 multiple-output 500kHz/1MHz Current-Mode PWM Step-UpDC-DC con ..
MAX1778EUG ,Quad-Output TFT LCD DC-DC Converters with BufferApplicationsTFT LCD Notebook DisplaysTypical Operating Circuit appears at end of data sheet.TFT LCD ..
MAX4613ESE+ ,Quad, SPST Analog SwitchApplications ♦ Low Power Consumption (35µW max)Sample-and-Hold Circuits Communication Systems♦ Rail ..
MAX4613EUE ,Quad, SPST Analog SwitchGeneral Description ________
MAX4613EUE+ ,Quad, SPST Analog SwitchMAX461319-1362; Rev 3; 6/07Quad, SPST Analog Switch________________
MAX4613EUE+T ,Quad, SPST Analog SwitchELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = 15V, V- = -15V, V = 5V, GND = 0V, V = 2.4V, V = 0.8V, ..
MAX4614CPD+ ,Low-Voltage, High-Speed, Quad, SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±10%, V = 2.4V, V = 0.8V, T = T to T , unless ..
MAX4614CSD ,Low-Voltage, High-Speed, Quad, SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±10%, V = 2.4V, V = 0.8V, T = T to T , unless ..

MAX1776EUA+-MAX1776EUA+T
24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
General Description
The MAX1776 high-efficiency step-down converter pro-
vides an adjustable output voltage from 1.25V to VINfrom
supply voltages as high as 24V. An internal current-limit-
ed 0.4ΩMOSFET delivers load currents up to 600mA.
Operation to 100% duty cycle minimizes dropout volt-
age (240mV at 600mA).
The MAX1776 has a low 15µA quiescent current to
improve light-load efficiency and conserve battery life.
The device draws only 3µA while in shutdown.
High switching frequencies (up to 200kHz) allow the
use of tiny surface-mount inductors and output capaci-
tors. The MAX1776 is available in an 8-pin µMAX pack-
age, which uses half the space of an 8-pin SO. For
increased output drive capability, use the MAX1626/
MAX1627 step-down controllers, which drive an exter-
nal P-channel MOSFET to deliver up to 20W.
Applications
Notebook Computers
Distributed Power Systems
Keep-Alive Supplies
Hand-Held Devices
FeaturesFixed 5V or Adjustable Output4.5V to 24V Input Voltage RangeUp to 600mA Output CurrentInternal 0.4ΩP-Channel MOSFETEfficiency Over 95%15µA Quiescent Supply Current3µA Shutdown Current100% Maximum Duty Cycle for Low DropoutCurrent-Limited ArchitectureThermal ShutdownSmall 8-µMAX Package
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
OUT
ILIM2LX
ILIM
GND
μMAX
TOP VIEW
SHDN
MAX1776EUA
Pin Configuration
Ordering Information
SHDN
VOUT
VIN
ILIMLX
OUT
ILIM2
GNDFB
MAX1776
μMAX
Typical Operating Circuit
19-1975; Rev 2; 7/03
PARTTEMP RANGEPIN-PACKAGE
MAX1776EUA-40°C to +85°C8 µMAX
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VIN= +12V, SHDN= IN, TA= 0°C to +85°C, unless otherwise noted.)
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, ILIM, ILIM2 to GND.................................-0.3V to 25V
LX to GND.......................................................-2V to (VIN+ 0.3V)
OUT, FB to GND.........................................................-0.3V to 6V
Peak Input Current..................................................................2A
Maximum DC Input Current..............................................500mA
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Voltage RangeVIN4.524V
Input Supply CurrentIINNo load1528µA
Input Supply Current in DropoutIIN(DROP)No load5070µA
Input Shutdown CurrentSHDN = GND37µA
VIN rising3.64.04.4Input Undervoltage Lockout
ThresholdVUVLOVIN falling3.53.94.3V
Output Voltage (Preset Mode)VOUTFB = GND4.805.005.20V
Feedback Set Voltage
(Adjustable Mode)VFB1.2121.251.288V
OUT Bias CurrentVOUT = 5.5V1.653.56.25µA
OUT Pin Maximum Voltage5.5V
FB Bias CurrentIFBVFB = 1.3V-25+25nA
FB Dual Mode™ Threshold Low50100150mV
LX Switch Minimum Off-TimetOFF(MIN)0.220.420.62µs
LX Switch Maximum On-TimetON(MAX)VFB = 1.3V81012µs
ILIM = ILIM2 = GND1.63.2
ILIM = GND, ILIM2 = IN0.81.6
ILIM = IN, ILIM2 = GND0.40.8VIN = 6V
ILIM = ILIM2 = IN0.40.8
ILIM = ILIM2 = GND1.93.8
ILIM = GND, ILIM2 = IN1.01.9
ILIM = IN, ILIM2 = GND0.50.95
LX Switch On-ResistanceRLX
VIN = 4.5V
ILIM = ILIM2 = IN0.50.95
ILIM = ILIM2 = GND120150180
ILIM = GND, ILIM2 = IN240300360
ILIM = IN, ILIM2 = GND480600720LX Current LimitILX(PEAK)
ILIM = ILIM2 = IN96012001440
LX Zero-Crossing Threshold-75+75mV
Zero-Crossing TimeoutLX does not rise above the threshold30µs
TA = +25°C1LX Switch Leakage CurrentVIN = 24V,
LX = GNDTA = 0°C to +85°C10µA
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN= +12V, SHDN= IN, TA= 0°C to +85°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VIN= +12V, SHDN= IN, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Dropout VoltageVDROPOUTIOUT = 525mA, ILIM = ILIM2 = IN0.2V
Line RegulationVIN = 8V/24V, 200Ω load0.1%/V
Load RegulationNo load/full load0.9%
Low0.8Digital Input LevelSHDN, ILIM2High2.4V
Digital Input Leakage CurrentV SHDN, VILIM, VILIM2 = 0 or 24V, VIN = 24V-1+1µA
Low0.05ILIM Input LevelHigh2.2V
Thermal Shutdown10°C hysteresis160°C
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
Input Voltage RangeVIN4.524V
Input Supply CurrentIINNo load28µA
Input Supply Current in DropoutIIN(DROP)No load70µA
Input Shutdown CurrentSHDN = GND7µA
VIN rising3.64.4Input Undervoltage Lockout
ThresholdVUVLOVIN falling3.54.3V
Output Voltage (Preset Mode)VOUTFB = GND4.755.25V
Feedback Set Voltage
(Adjustable Mode)VFB1.21.3V
OUT Bias CurrentVOUT = 5.5V1.656.25µA
OUT Pin Maximum Voltage5.5V
FB Bias CurrentIFBVFB = 1.3V-25+25nA
FB Dual Mode Threshold Low45155mV
LX Switch Minimum Off-TimetOFF(MIN)0.220.64µs
LX Switch Maximum On-TimetON(MAX)VFB = 1.3V7.512.5µs
ILIM = ILIM2 = GND3.2
ILIM = GND, ILIM2 = IN1.6
ILIM = IN, ILIM2 = GND0.8VIN = 6V
ILIM = ILIM2 = IN0.8
ILIM = ILIM2 = GND3.8
ILIM = GND, ILIM2 = IN1.9
ILIM = IN, ILIM2 = GND0.95
LX Switch On-ResistanceRLX
VIN = 4.5V
ILIM = ILIM2 = IN0.95
ILIM = ILIM2 = GND100200
ILIM = GND, ILIM2 = IN200400
ILIM = IN, ILIM2 = GND400800LX Current LimitILX(PEAK)
ILIM = ILIM2 = IN8001600
LOAD REGULATION, CIRCUIT 5
MAX1776 toc04
ILOAD (A)
OUTPUT
(% FROM V
OUT(NOM)
VIN = 24V
VIN = 12V
VIN = 15V
VOUTPUT vs. VIN,
CIRCUIT 5, VOUTPUT = 5V
MAX1776 toc05
VIN (V)
OUTPUT
(%)
ILOAD = 1mAILOAD = 50mA
ILOAD = 500mA
VOUTPUT vs. VIN,
CIRCUIT 5, VOUTPUT = 3.3V
MAX1776 toc06
VIN (V)
OUTPUT
(%)ILOAD = 1mA
ILOAD = 10mA
ILOAD = 50mA
LOAD REGULATION,
CIRCUIT 1, VOUTPUT = 5V
MAX1776 toc01
ILOAD (mA)
OUTPUT
(%)
VIN = 24V
VIN = 12V
VIN = 15V
LOAD REGULATION,
CIRCUIT 1, VOUTPUT = 3.3V
MAX1776 toc02
ILOAD (mA)
OUTPUT
(%)
VIN = 24V
VIN = 12V
VIN = 15V
VIN = 5V
LOAD REGULATION, CIRCUIT 2
MAX1776 toc03
ILOAD (mA)
OUTPUT
(%)
VIN = 24V
VIN = 12V
VIN = 15V
Typical Operating Characteristics
(Circuit of Figure 1, components from Table 3, VIN= +12V, SHDN= IN, TA= +25°C.)
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN= +12V, SHDN= IN, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
LX Zero-Crossing Threshold-7575mV
LX Switch Leakage CurrentVIN = 24V, LX = GND10µA
Low0.8Digital Input LevelSHDN, ILIM2High2.4V
Digital Input Leakage CurrentV SHDN, VILIM, VILIM2 = 0 or 24V, VIN = 24V-11µA
Low0.05ILIM Input LevelHigh2.2V
Note 1:Specifications to -40°C are guaranteed by design, not production tested.
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
VOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 5V
MAX1776 toc07
VIN (V)
OUTPUT
(%)
ILOAD = 1mAILOAD = 10mA
ILOAD = 50mA
ILOAD = 500mA
VOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 3.3V
MAX1776 toc08
VIN (V)
OUTPUT
(%)
ILOAD = 1mAILOAD = 10mA
ILOAD = 500mAILOAD = 50mA
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUT = 5V
MAX1776 toc09
ILOAD (mA)
EFFICIENCY (%)70
VIN = 15V
VIN = 12V
VIN = 24V
VIN = 6V
EFFICIENCY vs. ILOAD, CIRCUIT 5,
VOUTPUT = 3.3V
MAX1776 toc10
ILOAD (mA)
EFFICIENCY (%)70
VIN = 15V
VIN = 12V
VIN = 24V
VIN = 6V
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUTPUT = 3.3V
MAX1776 toc11
ILOAD (mA)
EFFICIENCY (%)70
VIN = 12VVIN = 24V
VIN = 6V
EFFICIENCY vs. VIN, ILOAD = 500mA
MAX1776 toc12
VIN (V)
EFFICIENCY (%)
CIRCUIT 1, 5VCIRCUIT 5, 5V
CIRCUIT 1, 3.3VCIRCUIT 5, 3.3V
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 3, VIN= +12V, SHDN= IN, TA= +25°C.)
SWITCHING FREQUENCY vs.
LOAD CURRENT, CIRCUIT 1
MAX1776 toc13
ILOAD (mA)
FREQUENCY (kHz)
VIN = 24V
VIN = 12V
VIN = 15V
SWITCHING FREQUENCY vs.
VIN, CIRCUIT 1
MAX1776 toc14
VIN (V)
FREQUENCY (kHz)10152025
ILOAD = 250mA
ILOAD = 375mA
ILOAD = 500mA
ILOAD = 10mAILOAD = 50mA
ILOAD = 5mA
VOUTPUT ACCURACY vs. TEMPERATURE
MAX1776 toc15
TEMPERATURE (°C)
OUT
ACCURACY (%)
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 3, VIN= +12V, SHDN= IN, TA= +25°C.)
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX1776
toc16
TEMPERATURE (°C)
QUIESCENT SUPPLY CURRENT (
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1776 toc17
SUPPLY VOLTAGE (V)
QUIESCENT SUPPLY CURRENT (
PEAK SWITCH CURRENT
vs. INPUT VOLTAGE, CIRCUIT 3, 0.3A
MAX1776 toc18
VIN (V)
PEAK SWITCH CURRENT (A)
L = 10μH
L = 22μH
L = 47μH
L = 100μH
LOAD-TRANSIENT RESPONSE,
CIRCUIT 5
MAX1776 toc19
ILOAD
VOUT
VLX
10V
10μs/div
10mA
500mA
AC COUPLED
50mV/div
LINE-TRANSIENT RESPONSE,
CIRCUIT 5, ILOAD = 500mA
MAX1776 toc20
VIN
VOUT
VLX
AC-COUPLED
200mv/div
10V
200μs/div
LINE-TRANSIENT RESPONSE,
CIRCUIT 5, ILOAD = 50mA
MAX1776 toc21
VIN
VOUT
VLX
15V
10V
10V
200μs/div
AC-COUPLED
200mv/div
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
LX WAVEFORM, CIRCUIT 1
VIN = 15V, ILOAD = 500mA
MAX1776 toc22
VLX
VOUT
10V
2μs/div
50mV/div
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 3, VIN= +12V, SHDN= IN, TA= +25°C.)
STARTUP WAVEFORM, CIRCUIT 1,
RLOAD = 100Ω
MAX1776 toc23
VOUT
2μs/div
VSHDN
EFFICIENCY vs. ILOAD, CIRCUIT 3, VIN = 12V
MAX1776
toc24
ILOAD (mA)
EFFICIENCY (%)
L = 22μH
L = 47μHL = 100μH
EFFICIENCY vs. ILOAD, CIRCUIT 3, VIN = 12V
MAX1776
toc25
ILOAD (mA)
EFFICIENCY (%)
L = 22μH, 0.6A
L = 10μH, 1.2A
L = 47μH, 0.3A

Partno	Mfg	Dc	Qty	Available	Descript
MAX1776EUA+ \|MAX1776EUA	MAXIM	N/a	18720	avai	24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
MAX1776EUA+T \|MAX1776EUAT	MAX	N/a	40	avai	24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter