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Part Number: MAX1967
Description: The MAX1966/MAX1967 are voltage-mode pulse-widthmodulated (PWM), step-down DC-DC controllers that are ...
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MAX1967
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DataSheet
General Description
MAX1967 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.
MAX1967 Maximum Ratings
(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
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
MAX1967 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
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
MAX1967 Typical Application
Set-Top Boxes
Graphic Card Supplies
xDSL Modems and Routers
Cable Modems and Routers
Telecom Power Supplies
Networking Power Supplies
Termination Supplies
Graphic Card Supplies
xDSL Modems and Routers
Cable Modems and Routers
Telecom Power Supplies
Networking Power Supplies
Termination Supplies
MAX1967 Connection Diagram
MAX1967
PDF/DataSheet Download
- Datasheet: MAX1967
- File Size: 415309 KB
- Manufacturer: Maxim
- Click here to Download
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