5A/2A Step-Down / PWM / Switch-Mode DC-DC Regulators - Maxim
Description
19-0107; Rev 3; 9/95
5A/2A Step-Down, PWM, Switch-Mode DC-DC Regulators
_______________General Description
The MAX724/MAX726 are monolithic, bipolar, pulsewidth modulation (PWM), switch-mode DC-DC regulators optimized for step-down applications.
The MAX724 is rated at 5A, and the MAX726 at 2A.
Few external 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 stepdown functions, but can also be configured as inverters, negative boost converters, or flyback converters.
These 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 MAX724/MAX726 also have a wide 8V to 40V input range in the buck stepdown configuration.
In inverting and boost configurations, the input can be as low as 5V.
The MAX724/MAX726 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 (MAX724) or 2.
6A (MAX726).
___________________________Features
o Input Range: Up to 40V o 5A On-Chip Power Switch (MAX724) 2A On-Chip Power Switch (MAX726) o Adjustable Output: 2.
5V to 35V o 100kHz Switching Frequency o Excellent Dynamic Characteristics o Few External Components o 8.
5mA Quiescent Current o TO-220 Package
MAX724/MAX726
______________Ordering Information
PART MAX724CCK MAX724ECK MAX726CCK MAX726ECK TEMP.
RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE 5 TO-220 5 TO-220 5 TO-220 5 TO-220
_______________________Applications
Distributed Power from High-Voltage Buses High-Current, High-Voltage Step-Down Applications High-Current Inverter Negative Boost Converter Multiple-Output Buck Converter Isolated DC-DC Conversion
__________Typical Operating Circuit
__________________Pin Configuration
FRONT VIEW
INPUT 8V TO 40V 220µ...
Similar Datasheet
