MXL1074CT ,5A/2A Step-Down / PWM / Switch-Mode DC-DC Regulatorsapplications. The MXL1074 is2A On-Chip Power Switch (MXL1076)rated at 5A, while the MXL1076 is rate ..
MXL1178CN8 ,17uA Max / Dual/Quad / Single-Supply / Precision Op AmpsFeatures
. 17pA Max Supply Current per Amplifier
. 70pV Max Offset Voltage
. 250pA Max Offset ..
MXL1344ACAG ,+5V Multiprotocol, Software-Selectable Cable TerminatorApplicationsand MXL1544/MAX3175 transceiver ICs. The MXL1344Aterminator can use the V power generat ..
MXL1344ACAG+T ,+5V Multiprotocol, Software-Selectable Cable TerminatorApplicationsand MXL1544/MAX3175 transceiver ICs. The MXL1344Aterminator can use the V power generat ..
MXL1535ECWI ,+3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with 【15kV ESD ProtectionFeatures♦ 2500V RS-485 Bus Isolation Using On-ChipThe MAX3535E/MXL1535E isolated RS-485/RS-422 full ..
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NDY1205C , Isolated 3W Wide Input DC/DC Converters
NDY1205C , Isolated 3W Wide Input DC/DC Converters
NDY1212C , Isolated 3W Wide Input DC/DC Converters
NDY2403C , Isolated 3W Wide Input DC/DC Converters
NDY2403C , Isolated 3W Wide Input DC/DC Converters
NDY2405C , Isolated 3W Wide Input DC/DC Converters
MXL1074CT
5A/2A Step-Down / PWM / Switch-Mode DC-DC Regulators
_______________General DescriptionThe MXL1074/MXL1076 are monolithic, bipolar, pulse-
width modulation (PWM), switch-mode DC-DC regulators
optimized for step-down applications. The MXL1074 is
rated at 5A, while the MXL1076 is rated at 2A. Few exter-
nal components are needed for standard operation
because the power switch, oscillator, and control circuitry
are all on-chip. Employing a classic buck topology, these
regulators perform high-current step-down functions, but
can also be configured as an inverter, a negative boost
converter, or a flyback converter.
The regulators have excellent dynamic and transient-
response characteristics, while featuring cycle-by-cycle
current limiting to protect against overcurrent faults and
short-circuit output faults. The MXL1074/MXL1076 also
have a wide 8V to 40V input range in the step-down
configuration. In inverting and step-up configurations,
the input can be as low as 5V.
The MXL1074/MXL1076 are available in a 5-pin TO-220
package. The devices have a preset 100kHz oscillator
frequency and a preset current limit of 6.5A for the
MXL1074, and 2.6A for the MXL1076. The MXL1074/
MXL1076 are pin compatible with the LT1074/LT1076.
________________________ApplicationsDistributed Power from High-Voltage Buses
High-Current, High-Voltage Step-Down Applications
High-Current Inverter
Negative Step-Up Converter
Multiple-Output Step-Down Converter
Isolated DC-DC Conversion
____________________________FeaturesInput Range:Up to 40V5A On-Chip Power Switch (MXL1074)
2A On-Chip Power Switch (MXL1076)Adjustable Output:2.5V to 35V100kHz Switching FrequencyExcellent Dynamic CharacteristicsFew External Components8.5mA Quiescent CurrentTO-220 Package
______________Ordering Information
MXL1074/MXL1076
5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
________________________________________________________________Maxim Integrated Products1
__________________________________________________Typical Operating Circuits
Call toll free 1-800-998-8800 for free samples or literature.19-0102; Rev 3; 9/95
___________________Pin Configuration
MXL1074/MXL1076
5A/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 Ground Pin (VSWnegative)
(Note 1)..............................................................................35V
Feedback Pin Voltage...............................................-0.3V, +10V
Operating Temperature Ranges
MXL1074CT/MXL1076CT...................................0°C to +70°C
MXL1074ET/MXL1076ET.................................-40°C to +85°C
Junction Temperature Ranges
MXL1074CT/MXL1076CT.................................0°C to +125°C
MXL1074ET/MXL1076ET...............................-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
Note 1:Do not exceed switch-to-input voltage limitation.
Note 2:For switch currents between 1A and 5A, maximum switch on voltage can be calculated via linear interpolation.
Note 3:By setting the feedback pin (FB) to 2.5V, 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 ground must be ‡8V after start-up.
Note 5:To avoid extremely short switch-on times, the switch frequency is internally scaled down when VFBis less than 1.3V. Switch
current limit is tested with VFBadjusted to give a 1µs minimum switch-on time.
Note 6:Guaranteed, not production tested.
MXL1074/MXL1076
5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)(VIN= 25V, Tj= TMINto TMAX, unless otherwise noted.)
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
MXL1074/MXL1076
5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
________________________________________________________Package Information
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