MAX1706
PRODUCTION1 to 3 Cell, High Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator
Low-Noise, Dual-Output Converter Powers PA and Radio Baseband and Logic In Cellular Phones
- Part Models
- 2
- 1ku List Price
- Starting From $5.25
Overview
- Up to 96% Efficiency
- 1.1VIN Guaranteed Startup
- Up to 850mA Output (MAX1705)
- Step-Up Output (2.5V to 5.5V Adjustable)
- Linear Regulator (1.25V to 5.0V Adjustable)
- PWM/PFM Synchronous-Rectified Topology
- 300kHz PWM Mode or Synchronizable
- 1µA Shutdown Mode
- Voltage Monitor
- Pushbutton On/Off Control
The MAX1705/MAX1706 are high-efficiency, low-noise, step-up DC-DC converters with an auxiliary linear-regulator output. These devices are intended for use in battery-powered wireless applications. They use a synchronous rectifier pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell. The MAX1705 has an internal 1A n-channel MOSFET switch. The MAX1706 has a 0.5A switch. Both devices also have a built-in low-dropout linear regulator that delivers up to 200mA.
With an internal synchronous rectifier, the MAX1705/MAX1706 deliver 5% better efficiency than similar non-synchronous converters. They also feature a pulse-frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 1µA shutdown mode. An efficiency-enhancing track mode reduces the step-up DC-DC converter output to 300mV above the linear-regulator output.
Both devices come in a 16-pin QSOP package, which occupies the same space as an 8-pin SO. Other features include two shutdown-control inputs for push-on/push-off control, and an uncommitted comparator for use as a voltage monitor.
Applications
- Digital Cordless Phones
- Handheld Instruments (PDAs, Palmtops)
- Palmtop Computers
- PCS Phones
- Personal Communicators
- Two-Way Paging
- Wireless Handsets
Documentation
Data Sheet 1
Design Note 2
Technical Articles 3
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1706EEE+ | QSOP | ||
| MAX1706EEE+T | QSOP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kits
Evaluation Kit for the MAX1705, MAX1706
Evaluation Kit for the MAX1705, MAX1706
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