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 ,24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down ConverterApplications Ordering InformationNotebook ComputersPART TEMP RANGE PIN-PACKAGEDistributed Power Sys ..
MAX1776EUA ,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 ..
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 ..
MAX4613EEE+ ,Quad, SPST Analog Switchfeatures on-resis-♦ Pin Compatible with Industry-Standard DG213tance matching (4Ω max) between swit ..
MAX4613EPE ,Quad, SPST Analog SwitchELECTRICAL CHARACTERISTICS—Dual Supplies (continued)(V+ = 15V, V- = -15V, V = 5V, GND = 0V, V = 2.4 ..
MAX4613ESE ,Quad, SPST Analog Switchfeatures on-resis-' Pin Compatible with Industry-Standard DG213tance matching (4Ω max) between swit ..
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________________
MAX1776EUA
24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
General DescriptionThe 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.
ApplicationsNotebook 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
Pin Configuration
Ordering Information
Typical Operating Circuit19-1975; Rev 2; 7/03
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICSStresses 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
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ELECTRICAL CHARACTERISTICS (continued)
ELECTRICAL CHARACTERISTICS
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)
Note 1:Specifications to -40°C are guaranteed by design, not production tested.
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down ConverterVOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 5V
MAX1776 toc07
VIN (V)
OUTPUT
(%)
VOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 3.3V
MAX1776 toc08
VIN (V)
OUTPUT
(%)
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUT = 5V
MAX1776 toc09
ILOAD (mA)
EFFICIENCY (%)70
EFFICIENCY vs. ILOAD, CIRCUIT 5,
VOUTPUT = 3.3V
MAX1776 toc10
ILOAD (mA)
EFFICIENCY (%)70
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUTPUT = 3.3V
MAX1776 toc11
ILOAD (mA)
EFFICIENCY (%)70
EFFICIENCY vs. VIN, ILOAD = 500mA
MAX1776 toc12
VIN (V)
EFFICIENCY (%)
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)
SWITCHING FREQUENCY vs.
VIN, CIRCUIT 1
MAX1776 toc14
VIN (V)
FREQUENCY (kHz)10152025
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.)
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
LX WAVEFORM, CIRCUIT 1
VIN = 15V, ILOAD = 500mAMAX1776 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.)
