The MAX8576–MAX8579 synchronous PWM buck controllers use a hysteretic voltage-mode control algorithm to achieve a fast transient response without requiring loop compensation. The MAX8576/MAX8577 contain an internal LDO regulator allowing the controllers to function from only one 3V to 28V input supply. The MAX8578/MAX8579 do not contain the internal LDO and require a separate supply to power the IC when the input supply is higher than 5.5V. The MAX8576–MAX8579 output voltages are adjustable from 0.6V to 0.9 x VIN at loads up to 15A.
Nominal switching frequency is programmable over the 200kHz to 500kHz range. High-side MOSFET sensing is used for adjustable hiccup current-limit and short-circuit protection. The MAX8576/MAX8578 can start up into a precharged output without pulling the output voltage down. The MAX8577/MAX8579 have startup output overvoltage protection (OVP), and will pull down a precharged output.
Key Features
Applications/Uses
3V to 28V Supply Voltage Range
1.2% Accurate Over Temperature
Adjustable Output Voltage Down to 0.6V
200kHz to 500kHz Switching Frequency
Adjustable Temperature-Compensated Hiccup Current Limit
Lossless Peak Current Sensing
Monotonic Startup into Prebias Output (MAX8576/MAX8578)
Startup Overvoltage Protection (MAX8577/MAX8579)
Enable/Shutdown
Adjustable Soft-Start
AGP and PCI Express® Power Supplies
Graphic-Card Power Supplies
Motherboard Power Supplies
Point-of-Load Power Supplies
Set-Top Boxes
Key Specifications:
Switch-Mode DC-DC Power Supplies
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
Download
E-Mail