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MAX727CCKMAXN/a181avai5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators
MAX727ECKMAXN/a13avai5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators
MAX727ECKMAXIMN/a2avai5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators
MAX728ECKMAXIMN/a2avai5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators
MAX729CCKMAXIMN/a222avai5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators


MAX729CCK ,5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC RegulatorsApplicationsMAX727ECK -40°C to +85°C 5 TO-220Distributed Power from High-Voltage BusesMAX728CCK 0°C ..
MAX730 ,5V / Step-Down / Current-Mode PWM DC-DC ConvertersFeaturesThe MAX730A/MAX738A/MAX744A are 5V-output' 750mA Load Currents (MAX738A/MAX744A)CMOS, step- ..
MAX7300AAX+ ,2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O ExpanderMAX7300 2-Wire-Interfaced, 2.5V to 5.5V,20-Port or 28-Port I/O Expander
MAX7300ATL , 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
MAX7300ATL , 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
MAX7300ATL+ ,2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V = 2.5V to 5.5V, T = T to T , unless otherwi ..
MB4M ,MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIERapplications0.205 (5.21)0.179 (4.55)0.195 (4.95)Mechanical Data0.049 (1.24)0.039 (0.99)0.106 (2.70) ..
MB4S ,Bridge RectifiersThermal Characteristics (T = 25°C unless otherwise noted)AParameter Symbol MB2S MB4S MB6S UnitDevic ..
MB4S_NL ,0.5A Bridge RectifierFeatures• Low leakage+ +- +• Surge overload rating:35 amperes peak.~ ~• Ideal for printed cir ..
MB501 , TECHNICAL SPECIFICATIONS OF SINGLE-PHASE SILICON BRIDGE RECTIFIER
MB501 , TECHNICAL SPECIFICATIONS OF SINGLE-PHASE SILICON BRIDGE RECTIFIER
MB501L ,TWO MODULE PRESCALERSA ust 1995 I do 'l'fi1'j,','ltf, f FUJITSU M350 f L/504/504L TWO MODUL US PRESCALERS TWO MO ..


MAX727CCK-MAX727ECK-MAX728ECK-MAX729CCK
5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC Regulators
_______________General Description
The MAX727/MAX728/MAX729 are monolithic, bipolar,
pulse-width modulation (PWM), switch-mode, step-down
DC-DC regulators. Each is rated at 2A. Very few external
components are needed for standard operation because
the power switch, oscillator, feedback, and control circuitry
are all on-chip. Employing a classic buck topology, these
regulators perform high-current step-down functions.
These regulators have excellent dynamic and transient
response characteristics, while featuring cycle-by-cycle cur-
rent limiting to protect against overcurrent faults and short-
circuit output faults. They also have a wide 8V to 40V input
range.
Each regulator is available in a 5-pin TO-220 package.
These devices have a preset 100kHz oscillator frequency
and a preset current limit of 2.6A. See the MAX724/
MAX726 data sheet for more applications information.
_______________________Applications

Distributed Power from High-Voltage Buses
High-Current, High-Voltage Step-Down Applications
Multiple-Output Buck Converter
MAX727/MAX728/MAX729
5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DCRegulators
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.

19-0149; Rev 2; 9/95
___________________________Features
Input Range:Up to 40V2A On-Chip Power SwitchFixed Outputs:5V (MAX727)
3.3V(MAX728)
3V (MAX729)
100kHz Switching FrequencyExcellent Dynamic CharacteristicsFew External Components8.5mAQuiescent CurrentTO-220 Package
______________Ordering Information
MAX727/MAX728/MAX729
5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DC Regulators_______________________________________________________________________________________

Input Voltage..................................................45V
Switch Voltage with Respect to Input Voltage................50V
Switch Voltage with Respect to GND Pin (VSWnegative)
(Note 1).....................................................35V
SENSE Pin Voltage...................................-0.3V, +10V
Operating Temperature Ranges
MAX72_CCK.....................................0°C to +70°C
MAX72_ECK....................................-40°C to +85°C
Junction Temperature Ranges:
MAX72_CCK....................................0°C to +125°C
MAX72_ECK..................................-40°C to +125°C
Storage Temperature Range...................-65°C to +160°C
Lead Temperature (soldering, 10sec)....................+300°C
ELECTRICAL CHARACTERISTICS

(VIN= 25V, Tj= TMINto TMAX, 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.
ABSOLUTE MAXIMUM RATINGS
MAX727/MAX728/MAX729
5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)

(VIN= 25V, Tj= TMINto TMAX, unless otherwise noted.)
Note 1:
Do not exceed switch-to-input voltage limitation.
Note 2:
For switch currents between 1A and 2A, maximum switch-on voltage can be calculated via linear interpolation.
Note 3:
By setting the SENSE pin to 5.5V, the VCpin is forced to its low clamp level and the switch duty cycle is forced to zero,
approximating the zero load condition.
Note 4:
For proper regulation, total voltage from VINto GND must be ‡8V after start-up.
Note 5:
To avoid extremely short switch-on times, the switch frequency is internally scaled down when VSENSEis less than 2.6V
(MAX727), 2.0V (MAX728), or 1.8V (MAX729). Switch current limit is tested with VSENSEadjusted to give a 1µs minimum
switch-on time.
Note 6:
Guaranteed, not production tested.
______________________________________________________________Pin Description
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-76001995 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.
MAX727/MAX728/MAX729
5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DCRegulators

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-76001995 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.
________________________________________________________Package Information
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