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Switching Regulator - Switching Regulators 
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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
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Key Features
Applications/Uses
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 4.5 |
| IOUT1 (A) (max) | 5 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 100 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 1.82 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Low-Cost Voltage-Mode PWM Step-Down Controllers | Sep 12, 2003 |
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Parameters
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 4.5 |
| IOUT1 (A) (max) | 5 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 100 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 1.82 |
Key Features
Applications/Uses
- Cable Modems and Routers
- Graphic Card Supplies
- Networking Power Supplies
- Set-Top Boxes
- Telecom Power Supplies
- Termination Supplies
- xDSL Modems and Routers
Description
The MAX1966/MAX1967 are voltage-mode pulse-width-modulated (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. Short- circuit 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 ac-commodate 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.
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 ac-commodate 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.
Technical Docs
| Data Sheet | Low-Cost Voltage-Mode PWM Step-Down Controllers | Sep 12, 2003 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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