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MAX1700

Maxim
Part Number MAX1700
Manufacturer Maxim
Description Step-Up DC-DC Converters
Published May 6, 2005
Detailed Description 19-4759; Rev 1; 1/99 L MANUA ION KIT HEET T A U L EVA TA S WS DA FOLLO 1-Cell to 3-Cell, High-Power (1A), Low-Noise, S...
Datasheet PDF File MAX1700 PDF File

MAX1700
MAX1700

Overview
19-4759; Rev 1; 1/99 L MANUA ION KIT HEET T A U L EVA TA S WS DA FOLLO 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters General Description Features o Up to 96% Efficiency o 1.
1 VIN Guaranteed Start-Up o 0.
7V to 5.
5V Input Range o Up to 800mA Output o Step-Up Output (adjustable from 2.
5V to 5.
5V) o PWM/PFM Synchronous-Rectified Topology o External Clock or Internal 300kHz Oscillator o 3µA Logic-Controlled Shutdown o Power-Good Output (MAX1701) o Low-Battery Comparator (MAX1701) o Uncommitted Gain Block (MAX1701) MAX1700/MAX1701 The MAX1700/MAX1701 are high-efficiency, low-noise, step-up DC-DC converters intended for use in batterypowered wireless applications.
They use a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.
5V to 5.
5V outputs from battery inputs such as one to three NiCd/NiMH cells or one LiIon cell.
Both devices have an internal 1A, 130mΩ Nchannel MOSFET switch and a 250m Ω P-channel synchronous rectifier.
With their internal synchronous rectifier, the MAX1700/ MAX1701 deliver 5% better efficiency than similar nonsynchronous converters.
They also feature a pulsefrequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 3µA shutdown mode.
The MAX1700/MAX1701 come in 16-pin QSOP packages (which occupy the same space as an 8-pin SO).
The MAX1701 includes two comparators to generate power-good and low-battery warning outputs.
It also contains a gain block that can be used to build a linear regulator using an external P-channel pass device.
For higher-power outputs, refer to the MAX1703.
For dual outputs (step-up and linear regulator), refer to the MAX1705/MAX1706.
For an on-board analog-to-digital converter, refer to the MAX848/MAX849.
The MAX1701 evaluation kit is available to speed design time.
Ordering Information PART MAX1700EEE MAX1701EEE TEMP.
RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 16 QSOP 16 QSOP Applications Digital Cordless Phones PCS Phones Wireless Handse...


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