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參數(shù)資料
| 型號： | MAX1917 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Tracking, Sinking and Sourcing, Synchronous Buck Controller for DDR Memory and Termination Supplies |
| 中文描述： | 跟蹤、可吸入/源出電流、同步buck控制器，用于DDR存儲器及端接電源 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 336K |
| 代理商： | MAX1917 |
General Description
The MAX1917 provides a complete power-manage-
ment solution for DDR memory. It contains a synchro-
nous buck controller and an amplifier to generate
1/2V
DDR
voltage for VTT and VTTR. The VTT and VTTR
voltages are maintained within 1% of 1/2V
DDR
. The
controller operates in synchronous rectification mode to
ensure balanced current sourcing and sinking capabili-
ty of up to 25A. With a shutdown current of less than
5μA, the MAX1917 is the best choice for low-power
notebook applications, as well as servers and desktop
computers. An all N-FET design optimizes efficiency.
The MAX1917 can also be used for generating V
DDR
and as a general-purpose step-down controller with
variable switching frequency as high as 1MHz with few
additional components.
The MAX1917 uses Maxim’s proprietary Quick-PWM
architecture for fast transient response up to 96% effi-
ciency, and the smallest external components. Output
current monitoring is achieved without sense resistors
by monitoring the bottom FET’s drain-to-source voltage.
The current-limit threshold is programmable through an
external resistor. The MAX1917 comes in a space-sav-
ing 16-pin QSOP package.
Applications
Features
o
25A Sourcing and Sinking Current
o
Automatically Sets VTT to 1/2V
DDR
o
VTT and VTTR Within 1% of 1/2V
DDR
o
Smallest Output Capacitors
o
4.5V to 14V (or 28V with Resistor-Divider) Input
Voltage Range
o
1.5V to 3.6V Input DDR Range
o
200kHz/300kHz/400kHz/550kHz Preset Switching
Frequencies
o
Variable Switching Frequency of Up to 1MHz
o
Overcurrent Protection Without Current-Sense
Resistor
o
Internal Soft-Start
o
VTTR Reference Sources and Sinks Up to 25mA
o
Quick-PWM Control for Fastest Loop Response
o
Up to 96% Efficiency
o
16-Pin QSOP Package
M
Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
________________________________________________________________
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
Ordering Information
MAX1917
V
IN
(2.5V TO 15V)
POK
VDDR
EN/HSD
POK
DDR
V+
REF
ILIM
FSEL
GND
DH
VL
BST
DL
LX
PGND
VTT
VTTR
V
OUT
VTTR
(4.5V TO 14V)
VL
Typical Operating Circuit
19-2335; Rev 1; 6/02
PART
TEMP RANGE
-40
°
C to +85
°
C
PIN-PACKAGE
16 QSOP
MAX1917EEE
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
EN/HSD
LX
DH
BST
PGND
DL
VL
V+
VTTR
TOP VIEW
MAX1917EEE
QSOP
DDR
POK
FSEL
VTT
ILIM
REF
GND
Pin Configuration
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
DDR Memory Power
Supply
Processor or DSP Core
Supply
AGTL Bus Termination
Supply
Notebook Computers
Desktop Computers
Storage
Networking Systems
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1917EEE | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1917EEE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1917EEE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1917EEE-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1917EEE-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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