MAX1684
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 300k Hz (MAX1684) 600k Hz (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 Auxiliary Output (CVL): 3V/5m A
General Description
The MAX1684/MAX1685 are high-efficiency, internalswitch, PWM step-down switching regulators intended to power cellular phones, municating PDAs, and handy-terminals. These devices deliver a guaranteed 1A output current from two Li-Ion batteries. Their wide input voltage range of 2.7V to 14V gives design flexibility and allows batteries to charge from a wall cube, since the ICs operate at the higher voltages that occur when the battery is...
