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MAX8529 数据表(PDF) 1 Page - Maxim Integrated Products |
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MAX8529 数据表(HTML) 1 Page - Maxim Integrated Products |
1 / 20 page General Description The MAX8529 dual, synchronized, step-down controller generates two outputs from input supplies ranging from 4.75V to 23V. Each output is adjustable from sub-1V to 18V. Input voltage ripple and total RMS input ripple current are reduced by synchronized 180-degree out-of- phase operation. The switching frequency is adjustable from 600kHz to 1.5MHz with an external resistor. Alternatively, the con- troller can be synchronized to an external clock gener- ated to another MAX8529 or a system clock. One MAX8529 can be set to generate an in-phase, or 90- degree out-of-phase, clock signal for synchronization with additional controllers. This allows two controllers to operate either as an interleaved two- or four-phase sys- tem with each output shifted by 90 degrees. These devices also feature soft-start and soft-stop. The MAX8529 eliminates the need for current-sense resistors by utilizing the low-side MOSFET’s on-resis- tance as a current-sense element. This protects the DC-to-DC components from damage during output overload conditions or when output short circuit faults without requiring a current-sense resistor. Adjustable foldback current limit reduces power dissipation during short-circuit conditions. The MAX8529 includes a power-on reset output to signal the system when both outputs reach regulation. The MAX8529 is available in a 24-pin QSOP package. An evaluation kit is available to speed designs. Applications xDSL Modems and Routers DSP, ASIC, and FPGA Power Supplies Set-Top Boxes Broadband Routers Features ♦ Low Output Noise in DSL Band ♦ Ceramic Input/Output Capacitors ♦ Step-Down or Step-Up/Step-Down Operation ♦ Four Output, 90-Degree Out-of-Phase Operation (Using Two MAX8529s) ♦ Foldback Current Limit ♦ 4.75V to 23V Input Supply Range ♦ 0 to 18V Output Voltage Range (Up to 6A) ♦ > 90% Efficiency ♦ Fixed-Frequency PWM Operation ♦ Adjustable 600kHz to 1.5MHz Switching Frequency ♦ External SYNC Input ♦ Clock Output for Master/Slave Synchronization ♦ Soft-Start and Soft-Stop ♦ RST Output with 140ms Minimum Delay ♦ Lossless Current Limit (No Sense Resistor) 1.5MHz Dual 180° Out-of-Phase PWM Step-Down Controller with POR ________________________________________________________________ Maxim Integrated Products 1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 EN LX2 DH2 BST2 OSC ILIM2 FB2 COMP2 TOP VIEW DL2 VL PGND DL1 CKO GND REF V+ 16 15 14 13 9 10 11 12 BST1 DH1 LX1 COMP1 FB1 ILIM1 SYNC QSOP MAX8529 RST Pin Configuration Ordering Information 19-2696; Rev 1; 4/07 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE MAX8529EEG -40 °C to +85°C 24 QSOP |
类似零件编号 - MAX8529_07 |
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类似说明 - MAX8529_07 |
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