Step-up Dc-dc Converters With Precise, Adaptive Current Limit For Gsm Integrated Products

The MAX1687 MAX1688 Step-up DC-DC Converters deliv- er up to 2W from a single Li-Ion or three NiMH cells. The devices are ideal for burst-load applications such as GSM cell phones and Wireless LANs, where the RF Power Amplifiers require short, high current bursts. The MAX1687 MAX1688 reduce battery surge current by slow- ly charging a reservoir capacitor, which supplies the nec- essary peak energy for the load current burst. As a result, the peak battery current is limited, thus maximizing battery life and minimizing battery voltage sag and transient dips. An internal synchronous Rectifier provides over 90% con- version efficiency and eliminates the need for an external Schottky Diode A Logic shutdown mode reduces the shut- down current to only 3A. The devices CAN be disabled during current bursts (RF transmit mode) to eliminate switching noise. The switching frequency of the MAX1687 MAX1688 con- trolled by the selected inductor, CAN exceed 1MHz. Two external resistors set the output voltage from 1.25V to 6V. The MAX1687 controls peak battery current, while the MAX1688 features a more advanced, adaptive constant- recharge-time algorithm that maximizes battery life. The MAX1687 MAX1688 are available in thin 16-pin TSSOP (1.1mm max height) or standard 8-pin SO packages. By Maxim Integrated Products
MAX1687 's PackagesMAX1687 's pdf datasheet
MAX1687EUE TSSOP
MAX1687ESA SO
MAX1688EUE TSSOP
MAX1688ESA SO
MAX1688

MAX1687 pdf datasheet download


MAX1687 Pinout, Pinouts
MAX1687 pinout,Pin out
This is one package pinout of MAX1687,If you need more pinouts please download MAX1687's pdf datasheet.

MAX1687 Application circuits
MAX1687 circuits
This is one application circuit of MAX1687,If you need more circuits,please download MAX1687's pdf datasheet.


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