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MAX1624 Fiches technique(PDF) 1 Page - Maxim Integrated Products

No de pièce MAX1624
Description  High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1624 Fiches technique(HTML) 1 Page - Maxim Integrated Products

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_______________General Description
The MAX1624/MAX1625 are ultra-high-performance,
step-down DC-DC controllers 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, they deliver
over 35A from 1.1V to 3.5V with ±1% total accuracy from
a +5V ±10% supply. Excellent dynamic response cor-
rects output transients caused by the latest dynamically
clocked CPUs. These controllers achieve over 90% effi-
ciency by using synchronous rectification. Flying-capaci-
tor bootstrap circuitry drives inexpensive, external
N-channel MOSFETs.
The switching frequency is resistor programmable from
100kHz to 1MHz. High switching frequencies allow the
use of a small surface-mount inductor and decrease out-
put filter capacitor requirements, reducing board area
and system cost.
The MAX1624 is available in a 24-pin SSOP and offers
additional features such as a digitally programmable out-
put in 100mV increments; adjustable transient response;
selectable 0.5%, 1%, or 2% AC load regulation; and gate
drive for a current-boost MOSFET. The MAX1625 is resis-
tor adjustable and comes in a 16-pin narrow SO pack-
age. Other features in both controllers include internal
digital soft-start, a power-good output, and a 3.5V ±1%
reference output. For a similar controller compatible with
the latest Intel VRM/VID specification, see the MAX1638*
data sheet.
________________________Applications
Pentium Pro™, Pentium II™, PowerPC™, Alpha™,
and K6™ Systems
Desktop Computers
LAN Servers
Industrial Computers
GTL Bus Termination
____________________________Features
o Better than ±1% Output Accuracy Over
Line and Load
o 90% Efficiency
o Excellent Transient Response
o Resistor-Programmable Fixed Switching
Frequency from 100kHz to 1MHz
o Over 35A Output Current
o Digitally Programmable Output from 1.1V to 3.5V
in 100mV Increments (MAX1624)
o Resistor-Adjustable Output down to 1.1V
(MAX1625)
o Remote Sensing
o Adjustable AC Loop Gain (MAX1624)
o GlitchCatcher™ Circuit for Fast Load-Transient
Response (MAX1624)
o Power-Good (PWROK) Output
o Current-Mode Feedback
o Digital Soft-Start
o Strong 2A Gate Drivers
o Current-Limited Output
High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
________________________________________________________________
Maxim Integrated Products
1
19-1227; Rev 1; 6/97
PART
MAX1624EAG
MAX1625ESE
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
24 SSOP
16 Narrow SO
______________Ordering Information
__________Typical Operating Circuit
Pin Configurations appear at end of data sheet.
*
Future product.
Pentium Pro and Pentium II are trademarks of Intel Corp.
PowerPC is a trademark of IBM Corp.
Alpha is a trademark of Digital Equipment Corp.
K6 is a trademark of Advanced Micro Devices.
GlitchCatcher is a trademark of Maxim Integrated Products.
EVALUATION
KIT
AVAILABLE
VCC
FREQ
CC2
CC1
REF
AGND
(SIMPLIFIED)
FB
DL
DH
PWROK
BST
CSL
CSH
LX
TO VDD
TO AGND
PGND
OUTPUT
1.1V TO 4.5V
INPUT
+5V
VDD
N
N
MAX1625
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.


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