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MAX1639ESE+T

Description
Switching Controllers High Speed Step Down
CategoryPower/power management    The power supply circuit   
File Size569KB,13 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX1639ESE+T Overview

Switching Controllers High Speed Step Down

MAX1639ESE+T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSOIC
package instructionSOP, SOP16,.25
Contacts16
Reach Compliance Codecompliant
ECCN codeEAR99
Factory Lead Time6 weeks
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-G16
JESD-609 codee3
length9.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply current (Isup)12 mA
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency1200 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
19-1337; Rev 1; 8/05
NUAL
KIT MA
ATION
ET
EVALU
TA SHE
WS DA
FOLLO
High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
____________________________Features
Better than ±1% Output Accuracy Over
Line and Load
Greater than 90% Efficiency Using N-Channel
MOSFETs
Pin-Selected High Switching Frequency:
300kHz, 600kHz, or 1MHz
Over 35A Output Current
Resistor-Divider Adjustable Output from
1.1V to 4.5V
Current-Mode Control for Fast Transient
Response and Cycle-by-Cycle Current-Limit
Protection
Short-Circuit Protection with Foldback Current
Limiting
Crowbar Overvoltage Protection
Power-Good (PWROK) Output
Digital Soft-Start
High-Current (2A) Drive Outputs
________________General Description
The MAX1639 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 1.1V
to 4.5V 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 synchro-
nous 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 out-
put filter capacitor requirements, reducing board area
and system cost.
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% refer-
ence output. The MAX1639 is available in a 16-pin
narrow SOIC package.
MAX1639
________________________Applications
Local DC-DC Converters for CPUs
Workstations
Desktop Computers
LAN Servers
GTL Bus Termination
__________ Typical Operating Circuit
INPUT
+5V
V
CC
AGND
TO V
DD
V
DD
BST
MAX1639
DH
LX
PWROK
OUTPUT
1.1V TO 4.5V
_______________Ordering Information
PART
MAX1639ESE
MAX1639ESE+
TEMP RANGE
40°C to +85°C
40°C to +85°C
PIN-PACKAGE
16 Narrow SO
16 Narrow SO
REF
DL
PGND
CSH
CSL
+Denotes
lead-free packages.
FREQ
Pin Configuration appears at end of data sheet.
CC1
CC2
FB
________________________________________________________________
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.

MAX1639ESE+T Related Products

MAX1639ESE+T MAX1639ESE-T MAX1639ESE
Description Switching Controllers High Speed Step Down Switching Controllers High-Speed Step-Down Controller with Synchronous Rectification for CPU Power Switching Controllers High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
Is it lead-free? Lead free Contains lead Contains lead
Is it Rohs certified? conform to incompatible incompatible
Maker Maxim Maxim Maxim
Parts packaging code SOIC SOIC SOIC
package instruction SOP, SOP16,.25 SOP, SOP16,.25 SOP, SOP16,.25
Contacts 16 16 16
Reach Compliance Code compliant not_compliant not_compliant
ECCN code EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 5.5 V 5.5 V 5.5 V
Minimum input voltage 4.5 V 4.5 V 4.5 V
Nominal input voltage 5 V 5 V 5 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e3 e0 e0
length 9.9 mm 9.9 mm 9.9 mm
Humidity sensitivity level 1 1 1
Number of functions 1 1 1
Number of terminals 16 16 16
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP
Encapsulate equivalent code SOP16,.25 SOP16,.25 SOP16,.25
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 260 245 245
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm
Maximum supply current (Isup) 12 mA 12 mA 12 mA
surface mount YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 1200 kHz 1200 kHz 1200 kHz
technology BICMOS BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface Matte Tin (Sn) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15)
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3.9 mm 3.9 mm 3.9 mm
Factory Lead Time 6 weeks - 1 week
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