Features and Benefits
- Up to 94% Efficiency
- +0.7V to +5.5V Input Voltage Range
- 1.1V Guaranteed Startup Input Voltage
- Up to 1.5A Output
- Fixed 3.3V Output or Adjustable (2.5V to 5.5V)
- 1MHz PWM Synchronous-Rectified Topology
- 1µA Logic-Controlled Shutdown
- Analog Gain Block for Linear-Regulator or Low-Battery Comparator
- Adjustable Current Limit and Soft-Start
- 1.5W TSSOP Package Available
The MAX1763 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device maintains exceptionally low quiescent supply current (110µA) despite its high 1MHz operating frequency. Small external components and a tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life.
The MAX1763 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 Idle Mode circuitry significantly improves efficiency at light load currents while smoothly transitioning to fixed-frequency PWM operation at higher load currents to maintain excellent full-load efficiency. Low-noise, forced-PWM mode is available for applications that require constant-frequency operation at all load currents. The MAX1763 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment.
The MAX1763 includes an on-chip linear gain block that can be used to build a high-power external linear regulator or as a low-battery comparator. Soft-start and current limit functions permit optimization of efficiency, external component size, and output voltage ripple.
The MAX1763 is available in a space-saving 16-pin QSOP package or a high-power (1.5W) 16-pin TSSOP-EP package.
- Digital Cordless Phones
- Handheld Instruments (PDAs, Palmtops)
- Palmtop Computers
- PCS Phones
- Personal Communicators
- 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.
Documentation & Resources
MAX1763 Reliability Data1/12/2023189K
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.
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