(China (Mainland))
Product Summary
The max1718eei-t step-down controller is intended for core CPU DC-DC converters in notebook computers. The max1718eei-t features a dynamically adjustable output, ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxims proprietary Quick-PWM quick-response, constant-ontime PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns instant-on response to load transients while maintaining a relatively constant switching frequency. Applications are (1)IMVP-II Notebook Computers; (2)2-Cell to 4-Cell Li+ Battery to CPU Core Supply; (3)Converters; (4)5V to CPU Core Supply Converters.
Parametrics
max1718eei-t absolute maximum ratings: (1)V+ to GND : -0.3V to +30V; (2)VCC, VDD to GND : -0.3V to +6V; (3)D0–D4, ZMODE, VGATE, OVP, SUS, to GND : -0.3V to +6V; (4)SKP/SDN to GND : -0.3V to +16V; (5)ILIM, CC, REF, POS, NEG, S1, S0,; (6)TON, TIME to GND: -0.3V to (VCC + 0.3V); (7)DL to GND: -0.3V to (VDD + 0.3V); (8)BST to GND: -0.3V to +36V; (9)DH to LX : -0.3V to (BST + 0.3V); (10)LX to BST: -6V to +0.3V; (11)REF Short Circuit to GND : Continuous; (12)Continuous Power Dissipation 28-Pin QSOP (derate 10.8mW/°C above +70°C): 860mW; (13)Operating Temperature Range : -40°C to +85°C; (14)Junction Temperature: +150°C; (15)Storage Temperature: -65°C to +150°C; (16)Lead Temperature (soldering, 10s): +300°C.
Features
max1718eei-t features: (1)Quick-PWM Architecture; (2)±1% VOUT Accuracy Over Line and Load; (3)5-Bit On-Board DAC with Input Muxes; (4)Precision-Adjustable VOUT Slew Control; (5)0.6V to 1.75V Output Adjust Range; (6)Precision Offset Control; (7)Supports Voltage-Positioned Applications; (8)2V to 28V Battery Input Range; (9)Requires a Separate 5V Bias Supply; (10)200/300/550/1000kHz Switching Frequency; (11)Over/Undervoltage Protection; (12)Drives Large Synchronous-Rectifier FETs; (13)700μA (typ)ICC Supply Current.
Diagrams
