DatasheetsPDF.com

MAX1638

Maxim
Part Number MAX1638
Manufacturer Maxim
Description High-Speed Step-Down Controller
Published May 6, 2005
Detailed Description 19-1313; Rev 0; 11/97 KIT ATION EVALU E L B AVAILA High-Speed Step-Down Controller with Synchronous Rectification for ...
Datasheet PDF File MAX1638 PDF File

MAX1638
MAX1638

Overview
19-1313; Rev 0; 11/97 KIT ATION EVALU E L B AVAILA High-Speed Step-Down Controller with Synchronous Rectification for CPU Power _______________General Description The MAX1638 is an ultra-high-performance, step-down DC-DC controller for CPU power in high-end computer systems.
Designed for demanding applications in which output voltage precision and good transient response are critical for proper operation, it delivers over 35A from 1.
3V to 3.
5V with ±1% total accuracy from a +5V ±10% supply.
Excellent dynamic response corrects output transients caused by the latest dynamically clocked CPUs.
This controller achieves over 90% efficiency by using synchronous rectification.
Flying-capacitor bootstrap circuitry drives inexpensive, external N-channel MOSFETs.
The switching frequency is pin-selectable for 300kHz, 600kHz, or 1MHz.
High switching frequencies allow the use of a small surface-mount inductor and decrease output filter capacitor requirements, reducing board area and system cost.
The MAX1638 is available in 24-pin SSOP and QSOP (future package) packages, and offers additional features such as a digitally programmable output; adjustable transient response; and selectable 0.
5%, 1%, or 2% AC load regulation.
Fast recovery from load transients is ensured by a GlitchCatcher™ current-boost circuit that eliminates delays caused by the buck inductor.
Output overvoltage protection is enforced by a crowbar circuit that turns on the low-side MOSFET with 100% duty factor when the output is 200mV above the normal regulation point.
Other features include internal digital soft-start, a power-good output, and a 3.
5V ±1% reference output.
____________________________Features o Better than ±1% Output Accuracy Over Line and Load o Greater than 90% Efficiency Using N-Channel MOSFETs o Pin-Selected High Switching Frequency (300kHz, 600kHz, or 1MHz) o Over 35A Output Current o Digitally Programmable Output from 1.
3V to 3.
5V o Current-Mode Control for Fast Transient Response and Cycl...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)