Overview
Features and Benefits
- High-Efficiency Step-Up Converter
- Up to 93% Efficiency
- Adjustable Output from +2.5V to +5.5V
- Up to 800mA Output
- PWM Synchronous-Rectified Topology
- 1MHz Operating Frequency (or Sync)
- LDO Linear Regulator
- 500mA LDO Linear Regulator
- 2.85V Linear Regulator Output or Adjustable (1.25V to 5V)
- Low 125mV Dropout at 500mA
- +0.7V to +5.5V Input Range
- 0.1µA Logic-Controlled Shutdown
- Adjustable Inductor Current Limit and Soft-Start
- Thermal Shutdown
- 1.5W, 16-Pin TSSOP-EP Package Available
Product Details
The MAX1765 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device operates at a high 1MHz fixed frequency while maintaining an exceptionally low quiescent supply current (200µA). Its small external components and tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life.
The MAX1765 uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of input sources, such as one to three alkaline or NiCd/NiMH cells or a single lithium-ion (Li+) cell. Maxim's proprietary architecture significantly improves efficiency at low load currents while automatically transitioning to fixed-frequency PWM operation at medium to high load currents to maintain excellent full-load efficiency. Forced-PWM mode is available for applications that require constant-frequency operation at all load currents, and the MAX1765 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment.
The MAX1765's low-dropout (LDO) linear regulator and DC-DC converter have separate shutdown control. The linear regulator's 250mΩ pass device maintains excellent dropout voltage at currents up to 500mA. The MAX1765 also features analog soft-start and current-limit functions to permit optimization of efficiency, external component size, and output voltage ripple.
The MAX1765 comes in a 16-pin QSOP package and a thermally enhanced 16-pin TSSOP-EP.
Applications
- Handheld Instruments (PDAs, Palmtops)
- Palmtop Computers
- PCS Phones
- Personal Communicators
- Portable Audio Players
- Wireless Handsets
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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MAX1765 Reliability Data1/12/2023
Product Recommendations
MAX1765 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
---|---|---|---|---|
MAX1765EEE+ | Material Declaration | Reliability Data | 16-QSOP-150_MIL | |
MAX1765EEE+T | Material Declaration | Reliability Data | 16-QSOP-150_MIL | |
MAX1765EUE+ | Material Declaration | Reliability Data | 16-TSSOP_4.4_EP-4.4_MM | |
MAX1765EUE+T | Material Declaration | Reliability Data | 16-TSSOP_4.4_EP-4.4_MM | |
Wafer Fabrication Data | MAX1765 Reliability Data |
Support & Discussions
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