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MAX1685 - Low-Noise / 14V Input / 1A / PWM Step-Down Converters

General Description

The MAX1684/MAX1685 are high-efficiency, internalswitch, PWM step-down switching regulators intended to power cellular phones, communicating PDAs, and handy-terminals.

These devices deliver a guaranteed 1A output current from two Li-Ion batteries.

Key Features

  • o Up to 96% Efficiency o 1A Guaranteed Output Current o 100% Duty Cycle in Dropout o 2.7V to 14V Input Range (15V absolute max) o ±1% Accurate Reference Output o 0.24Ω P-Channel On-Resistance o Synchronizable Switching Frequency o Fixed-Frequency PWM Operation 300kHz (MAX1684) 600kHz (MAX1685) o 150µA Normal Mode Quiescent Current o 25µA Low-Power Mode Quiescent Current o 2µA Shutdown Current o Dual Mode™ Fixed 3.3V (±1%) Output or Adjustable Output (1.25V to VIN) o Small 16-QSOP Package o Auxil.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX1680 Switched-Capacitor Voltage Converters
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MAX1684 Low-Noise / 14V Input / 1A / PWM Step-Down Converters

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1454; Rev 0; 4/99 L MANUA ION KIT HEET T A U L EVA TA S WS DA FOLLO Low-Noise, 14V Input, 1A, PWM Step-Down Converters Features o Up to 96% Efficiency o 1A Guaranteed Output Current o 100% Duty Cycle in Dropout o 2.7V to 14V Input Range (15V absolute max) o ±1% Accurate Reference Output o 0.24Ω P-Channel On-Resistance o Synchronizable Switching Frequency o Fixed-Frequency PWM Operation 300kHz (MAX1684) 600kHz (MAX1685) o 150µA Normal Mode Quiescent Current o 25µA Low-Power Mode Quiescent Current o 2µA Shutdown Current o Dual Mode™ Fixed 3.3V (±1%) Output or Adjustable Output (1.