參數(shù)資料
型號(hào)： MAX1939EEI
廠(chǎng)商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： Two-Phase Desktop CPU Core Supply Controllers with Controlled VID Change
中文描述： SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28
封裝： 0.150 INCH, 0.025 INCH PITCH, MO-137, QSOP-28
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 586K
代理商： MAX1939EEI
General Description
The MAX1937/MAX1938/MAX1939 comprise a family of
synchronous, two-phase, step-down controllers capable
of delivering load currents up to 60A. The controllers uti-
lize Quick-PWM control architecture in conjunction with
active load-current voltage positioning. Quick-PWM con-
trol provides instantaneous load-step response, while
programmable voltage positioning allows the converter
to utilize full transient regulation limits, reducing the out-
put capacitance requirement. The two phases operate
180° out-of-phase with an effective 500kHz switching fre-
quency, thus reducing input and output current ripple, as
well as reducing input filter capacitor requirements.
The MAX1937/MAX1938/MAX1939 are compliant with
AMD Hammer, Intel
Voltage-Regulator Module (VRM)
9.0/9.1, and AMD Athlon Mobile VID code specifica-
tions (see Table 1 for VID codes). The internal DAC pro-
vides ultra-high accuracy of ±0.75%. A controlled VID
voltage transition is implemented to minimize both
undervoltage and overvoltage overshoot during VID
input change.
Remote sensing is available for high output-voltage
accuracy. The MOSFET switches are driven by a 6V
gate-drive circuit to minimize switching and crossover
conduction losses to achieve efficiency as high as
90%. The MAX1937/MAX1938/MAX1939 feature cycle-
by-cycle current limit to ensure that the current limit is
not exceeded. Crowbar protection is available to pro-
tect against output overvoltage.
Applications
Notebook and Desktop Computers
Servers and Workstations
Blade Servers
High-End Switches
High-End Routers
Macro Base Stations
Features
o
±0.75% Output Voltage Accuracy
o
Instant Load-Transient Response
o
Up to 90% Efficiency Eliminates Heatsinks
o
Up to 60A Output Current
o
8V to 24V Input Range
o
User-Programmable Voltage Positioning
o
Controlled VID Voltage Transition
o
500kHz Effective Switching Frequency
o
MAX1937: AMD Hammer Compatible
o
MAX1938: Intel VRM 9.0/9.1 Compatible
o
MAX1939: AMD Athlon Mobile Compatible
o
Soft-Start
o
Power-Good (PWRGD) Output
o
Cycle-by-Cycle Current Limit
o
Output Overvoltage Protection (OVP)
o
R
DS(ON)
or R
SENSE
Current Sensing
o
Remote Voltage Sensing
o
28-Pin QSOP Package
M
Two-Phase Desktop CPU Core Supply Controllers
with Controlled VID Change
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V
CC
BST1
DH1
LX1
CS1
DL1
PWRGD
VLG
PGND
DL2
CS2
LX2
DH2
BST2
FB
EN
REF
GNDS
GND
ILIM
V
DD
VPOS
VID4
VID3
VID2
TIME
VID1
VID0
QSOP
TOP VIEW
MAX1937
MAX1938
MAX1939
Pin Configuration
Ordering Information
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
19-2498; Rev 1; 10/02
PART
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
MAX1937
EEI
MAX1938
EEI
MAX1939
EEI
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Athlon is a trademark of Advanced Micro Devices, Inc.
Intel is a registered trademark of Intel Corp.
Typical Application Circuits and Functional Diagram appear
at end of data sheet.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1939EEI-T 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1940EEE 功能描述:電源開(kāi)關(guān) IC - USB Triple USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
MAX1940EEE+ 功能描述:電源開(kāi)關(guān) IC - USB Triple USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
MAX1940EEE+T 功能描述:電源開(kāi)關(guān) IC - USB Triple USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
MAX1940EEE-T 功能描述:電源開(kāi)關(guān) IC - USB Triple USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
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