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MAX1624EAG

Description
Switching Controllers
CategoryPower/power management    The power supply circuit   
File Size222KB,24 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX1624EAG Overview

Switching Controllers

MAX1624EAG Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeSSOP
package instructionSSOP, SSOP24,.3
Contacts24
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage4.5 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G24
JESD-609 codee0
length8.2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals24
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP24,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)245
Certification statusNot Qualified
Maximum seat height1.99 mm
Maximum supply current (Isup)3 mA
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency1000 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width5.29 mm
19-1227; Rev 1; 6/97
IT
TION K
VALUA
E
BLE
AVAILA
High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
____________________________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
_______________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 V
RM
/V
ID
specification, see the MAX1638*
data sheet.
MAX1624/MAX1625
__________Typical Operating Circuit
INPUT
+5V
V
CC
TO AGND
TO V
DD
V
DD
CSH
________________________Applications
Pentium Pro™, Pentium II™, PowerPC™, Alpha™,
and K6™ Systems
Desktop Computers
LAN Servers
Industrial Computers
GTL Bus Termination
MAX1625
CSL
BST
PWROK
DH
N
OUTPUT
1.1V TO 4.5V
N
______________Ordering Information
PART
MAX1624EAG
MAX1625ESE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 SSOP
16 Narrow SO
FREQ
LX
DL
PGND
CC2
FB
CC1
REF
AGND
(SIMPLIFIED)
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.
________________________________________________________________
Maxim Integrated Products
1
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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