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MAX1966

Features: Cost-Optimized Design No Schottky Diode or Current-Sense Resistor Required>95% EfficiencyLow-Cost External ComponentsAll N-Channel FET Design2.7V to 5.5V Input Range (MAX1966)2.7V to 28V Input Range (MAX1967)0.8V Feedback for Low-Voltage Outputs100kHz Switching Frequency Accommodates ...

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SeekIC No. : 004409477 Detail

MAX1966: Features: Cost-Optimized Design No Schottky Diode or Current-Sense Resistor Required>95% EfficiencyLow-Cost External ComponentsAll N-Channel FET Design2.7V to 5.5V Input Range (MAX1966)2.7V to 28...

MAX1966 Data Sheet

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Part Number:
MAX1966
Supply Ability:
5000

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Product Details

Description



Features:

 Cost-Optimized Design
No Schottky Diode or Current-Sense Resistor Required
 >95% Efficiency
 Low-Cost External Components
 All N-Channel FET Design
 2.7V to 5.5V Input Range (MAX1966)
 2.7V to 28V Input Range (MAX1967)
 0.8V Feedback for Low-Voltage Outputs
 100kHz Switching Frequency Accommodates Low-Cost Components
 Thermal Shutdown
 Output Current-Limit and Short-Circuit Protection


Application

Set-Top Boxes
Graphic Card Supplies
xDSL Modems and Routers
Cable Modems and Routers
Telecom Power Supplies
Networking Power Supplies
Termination Supplies


Pinout

Connection Diagram


Specifications

(All Voltages Referenced to GND, Unless Otherwise Noted)
VIN to GND (MAX1966)..............................................-0.3V to +6V
VIN to GND (MAX1967)............................................-0.3V to +30V
VCC to GND (MAX1967)............-0.3V, lower of 6V or (VIN + 0.3V)
FB to GND ................................................................-0.3V to +6V
DL, COMP/EN to GND (MAX1966) ..................-0.3V to VIN + 0.3V
VL, DL, COMP/EN to GND (MAX1967).............-0.3V to VCC + 0.3V
BST to LX..................................................................-0.3V to +6V
DH to LX........................................................-0.3V to BST + 0.3V
VL Short to GND (MAX1967) ....................................................5s
RMS Input Current (any pin).............................................±50mA
Continuous Power Dissipation (TA = +70°C)
    8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
    10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


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.




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