MAX887HC/D

The MAX887HC/D is one member of the MAX887 family which is designed as the 100% duty cycle, low-noise, step-down, PWM DC-DC converter that can be used in (1)portable instruments; (2)cellular phones and radios; (3)personal communicators; (4)distributed power systems; (5)computer peripherals. This device accepts inputs from 3.5V to 11V and delivers 600mA. Operation to 100% duty cycle minimizes dropout voltage (300mV typ at 500mA). Synchronous rectification reduces output rectifier losses, resulting in efficiency as high as 95%.

Features of the MAX887HC/D are:(1)95% Efficiency; (2)600mA Output Current; (3)Cycle-by-Cycle Current Limiting; (4)Low-Dropout, 100% Duty-Cycle Operation, 300mV at 500mA; (5)Internal 0.6(typ) MOSFET; (6)Internal Synchronous Rectifier; (7)High-Frequency Current-Mode PWM; (8)External SYNC or Internal 300kHz Oscillator; (9)Guaranteed 260kHz to 340kHz Internal Oscillator Frequency Limits; (10)2.5uA Shutdown Mode.

The absolute maximum ratings of the MAX887HC/D can be summarized as:(1)lead temperature (soldering, 10sec): +300°C;(2)Storage Temperature Range: -65°C to +165°C;(3)Operating Temperature Ranges: 0°C to +70°C;(4)Continuous Power Dissipation (TA = +70°C) SO (derate 9.09mW/°C above +70°C): 471 mW;(5)PGND to GND: -0.3V to +0.3V;(6)SHDN, LX to GND: -0.3V to (V+ +0.3V);(7)V+ to GND: -0.3V to +12V;(8)REF, FB, SYNC, VL to GND: -0.3V to +6V. If you want to know more information such as the electrical characteristics about the MAX887HC/D, please download the datasheet in www.seekic.com or www.chinaicmart.com .