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MAX748ACWE+

Description
voltage regulators - switching regulators 3.3V step-down DC/DC converter
CategoryPower/power management    The power supply circuit   
File Size133KB,12 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX748ACWE+ Overview

voltage regulators - switching regulators 3.3V step-down DC/DC converter

MAX748ACWE+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSOIC
package instructionSOP,
Contacts16
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time6 weeks
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage16 V
Minimum input voltage3.3 V
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length10.3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current2 A
Nominal output voltage3.3 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height2.65 mm
Maximum supply current (Isup)3 mA
surface mountYES
Switch configurationBUCK
Maximum switching frequency180 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.5 mm
19-0190; Rev 0; 9/93
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
__________________General Description
The MAX748A/MAX763A are 3.3V-output CMOS, step-
down switching regulators. The MAX748A accepts
inputs from 3.3V to 16V and delivers up to 500mA. The
MAX763A accepts inputs between 3.3V and 11V and
delivers up to 500mA. Typical efficiencies are 85% to
90%. Quiescent supply current is 1.4mA (MAX763A),
and only 0.2µA in shutdown.
Pulse-width-modulation (PWM) current-mode control pro-
vides precise output regulation and excellent transient
responses. Output voltage accuracy is guaranteed to be
±5% over line, load, and temperature variations.
Fixed-frequency switching allows easy filtering of output
ripple and noise, as well as the use of small external
components. A 22µH inductor works in most applica-
tions, so no magnetics design is necessary.
The MAX748A/MAX763A also feature cycle-by-cycle cur-
rent limiting, overcurrent limiting, undervoltage lockout,
and programmable soft-start protection. The MAX748A
is available in 8-pin DIP and 16-pin wide SO packages;
the MAX763A comes in 8-pin DIP and SO packages.
________________________________Features
o
Up to 500mA Load Currents
o
Guaranteed 159kHz to 219.5kHz Current-Mode
PWM
o
85% to 90% Efficiencies
o
1.7mA Quiescent Current (MAX748A)
1.4mA Quiescent Current (MAX763A)
o
0.2µA Shutdown Supply Current
o
22µH Preselected Inductor Value;
No Component Design Required
o
Overcurrent, Soft-Start, and Undervoltage
Lockout Protection
o
Cycle-by-Cycle Current Limiting
o
8-Pin DIP/SO Packages (MAX763A)
MAX748A/MAX763A
_________________Ordering Information
PART
MAX748ACPA
MAX748ACWE
MAX748AC/D
MAX748AEPA
MAX748AEWE
MAX748AMJA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
16 Wide SO
Dice*
8 Plastic DIP
16 Wide SO
8 CERDIP
___________________________Applications
5V-to-3.3V Converters
Cellular Phones
Portable Instruments
Hand-Held Computers
Computer Peripherals
Ordering Information continued on last page.
* Contact factory for dice specifications.
____________Typical Operating Circuit
INPUT
3.3V TO 16V
V+
22µH
LX
OUTPUT
3.3V
____________________Pin Configurations
TOP VIEW
MAX748A
ON/OFF
SHDN
OUT
100µF
REF
SS
GND
CC
SHDN
1
REF
2
8
7
V+
LX
GND
OUT
SS
3
CC
4
MAX748A
MAX763A
6
5
DIP
Pin Configurations continued on last page.
_______________________________________________________________________
Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.

MAX748ACWE+ Related Products

MAX748ACWE+ MAX763AESA+T MAX748AEWE+ MAX748AEWE+T MAX763ACSA+T MAX763ACSA+
Description voltage regulators - switching regulators 3.3V step-down DC/DC converter voltage regulators - switching regulators 3.3V step-down DC/DC converter voltage regulators - switching regulators 3.3V step-down DC/DC converter voltage regulators - switching regulators 3.3V step-down DC/DC converter voltage regulators - switching regulators 3.3V step-down DC/DC converter voltage regulators - switching regulators 3.3V step-down DC/DC converter
Is it lead-free? Lead free Lead free Lead free Lead free Lead free Lead free
Is it Rohs certified? conform to conform to conform to conform to conform to conform to
Maker Maxim Maxim Maxim Maxim Maxim Maxim
Parts packaging code SOIC SOIC SOIC SOIC SOIC SOIC
package instruction SOP, SOP, SOP, SOP, SOP, SOP,
Contacts 16 8 16 16 8 8
Reach Compliance Code compli compli compli compli compli compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Factory Lead Time 6 weeks 6 weeks 6 weeks 12 weeks 7 weeks 6 weeks
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 16 V 11 V 16 V 16 V 11 V 11 V
Minimum input voltage 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V
JESD-30 code R-PDSO-G16 R-PDSO-G8 R-PDSO-G16 R-PDSO-G16 R-PDSO-G8 R-PDSO-G8
JESD-609 code e3 e3 e3 e3 e3 e3
length 10.3 mm 4.9 mm 10.3 mm 10.3 mm 4.9 mm 4.9 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1
Number of terminals 16 8 16 16 8 8
Maximum operating temperature 70 °C 85 °C 85 °C 85 °C 70 °C 70 °C
Maximum output current 2 A 2 A 2 A 2 A 2 A 2 A
Nominal output voltage 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 260 260 260 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 2.65 mm 1.75 mm 2.65 mm 2.65 mm 1.75 mm 1.75 mm
Maximum supply current (Isup) 3 mA 2.5 mA 3 mA 3 mA 2.5 mA 2.5 mA
surface mount YES YES YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 180 kHz 200 kHz 180 kHz 180 kHz 200 kHz 200 kHz
technology CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL COMMERCIAL COMMERCIAL
Terminal surface Matte Tin (Sn) MATTE TIN Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 7.5 mm 3.9 mm 7.5 mm 7.5 mm 3.9 mm 3.9 mm

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