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MAX1966

Maxim
Part Number MAX1966
Manufacturer Maxim
Published May 6, 2005
Description Low-Cost Voltage-Mode PWM Step-Down Controllers
Detailed Description 19-2286; Rev 1; 9/03 Low-Cost Voltage-Mode PWM Step-Down Controllers General Description The MAX1966/MAX1967 are voltag...
Datasheet PDF File MAX1966 PDF File

MAX1966
MAX1966


Overview
19-2286; Rev 1; 9/03 Low-Cost Voltage-Mode PWM Step-Down Controllers General Description The MAX1966/MAX1967 are voltage-mode pulse-widthmodulated (PWM), step-down DC-DC controllers that are ideal for a variety of cost-sensitive applications.
They drive low-cost N-MOSFETs for both the high-side switch and synchronous rectifier and require no external Schottky power diode or current-sense resistor.
Shortcircuit and current-limit protection is provided by sensing the drain-to-source voltage on the low-side FET.
Both devices can supply outputs as low as 0.
8V and are well suited for DSP cores and other low-voltage logic.
The MAX1966 has an input range of 2.
7V to 5.
5V while the MAX1967 has an input range of 2.
7V to 28V.
In ultra-low-cost designs, the MAX1966/MAX1967 can provide efficiency exceeding 90% and can achieve 95% efficiency with optimized component selection.
The MAX1966/MAX1967 operate at 100kHz and accommodate aluminum electrolytic capacitors and powdered-iron core magnetics in minimum-cost designs.
They also provide excellent performance with high-performance surface-mount components.
The MAX1966 is available in a low-cost 8-pin SO package.
The MAX1967 is available in a 10-pin µMAX package.
o Cost-Optimized Design o No Schottky Diode or Current-Sense Resistor Required o >95% Efficiency o Low-Cost External Components o All N-Channel FET Design o 2.
7V to 5.
5V Input Range (MAX1966) o 2.
7V to 28V Input Range (MAX1967) o 0.
8V Feedback for Low-Voltage Outputs o 100kHz Switching Frequency Accommodates Low-Cost Components o Thermal Shutdown o Output Current-Limit and Short-Circuit Protection Features MAX1966/MAX1967 Ordering Information PART MAX1966ESA MAX1967EUB TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 SO 10 µMAX Applications Set-Top Boxes Graphic Card Supplies xDSL Modems and Routers Cable Modems and Routers Telecom Power Supplies Networking Power Supplies Termination Supplies Typical Operating Circuit 2.
7V TO 5.
5V INPUT Pin Configurations VIN ...


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