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參數(shù)資料
| 型號： | MAX1717 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP |
| 中文描述： | 動態(tài)可調(diào)、同步降壓型控制器，用于筆記本CPU |
| 文件頁數(shù)： | 1/32頁 |
| 文件大小： | 501K |
| 代理商： | MAX1717 |
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General Description
The MAX1717 step-down controller is intended for core
CPU DC-DC converters in notebook computers. It fea-
tures a dynamically adjustable output, ultra-fast tran-
sient response, high DC accuracy, and high efficiency
needed for leading-edge CPU core power supplies.
Maxim’s proprietary Quick-PWM quick-response,
constant-on-time PWM control scheme handles wide
input/output voltage ratios with ease and provides
100ns “instant-on” response to load transients while
maintaining a relatively constant switching frequency.
The output voltage can be dynamically adjusted
through the 5-bit digital-to-analog converter (DAC)
inputs over a 0.925V to 2V range. A unique feature of
the MAX1717 is an internal multiplexer (mux) that
accepts two 5-bit DAC settings with only five digital
input pins. Output voltage transitions are accomplished
with a proprietary precision slew-rate control
that mini-
mizes surge currents to and from the battery while
guaranteeing “just-in-time” arrival at the new DAC setting.
High DC precision is enhanced by a two-wire remote-
sensing scheme that compensates for voltage drops in
the ground bus and output voltage rail. Alternatively,
the remote-sensing inputs can be used together with
the MAX1717’s high DC accuracy to implement a volt-
age-positioned circuit that modifies the load-transient
response to reduce output capacitor requirements and
full-load power dissipation.
Single-stage buck conversion allows these devices to
directly step down high-voltage batteries for the highest
possible efficiency. Alternatively, two-stage conversion
(stepping down the +5V system supply instead of the
battery) at a higher switching frequency allows the mini-
mum possible physical size.
The MAX1717 is available in a 24-pin QSOP package.
Applications
Notebook Computers with SpeedStep or Other
Dynamically Adjustable Processors
2-Cell to 4-Cell Li+ Battery to CPU Core Supply
Converters
5V to CPU Core Supply Converters
Features
o
Quick-PWM Architecture
o
±1% V
OUT
Accuracy Over Line and Load
o
5-Bit On-Board DAC with Input Mux
o
Precision-Adjustable V
OUT
Slew Control
o
0.925V to 2V Output Adjust Range
o
Supports Voltage-Positioned Applications
o
2V to 28V Battery Input Range
o
Requires a Separate +5V Bias Supply
o
200/300/550/1000kHz Switching Frequency
o
Over/Undervoltage Protection
o
Drives Large Synchronous-Rectifier FETs
o
700μA typ I
CC
Supply Current
o
2μA typ Shutdown Supply Current
o
2V ±1% Reference Output
o
VGATE Transition-Complete Indicator
o
Small 24-Pin QSOP Package
M
Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
________________________________________________________________
Maxim Integrated Products
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
19-1636; Rev 0; 1/00
PART
MAX1717EEG
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
24 QSOP
Ordering Information
Pin Configuration appears at end of data sheet.
Patent pending.
Quick-PWM is a trademark of Maxim Integrated Products.
SpeedStep is a trademark of Intel Corp.
TIME
VGATE
DH
LX
DL
BST
+5V INPUT
ILIM
GNDS
A/B
FBS
D0
D1
D2
D3
D4
REF
TON
CC
GND
FB
MAX1717
V+
V
CC
SKP/SDN
V
DD
OUTPUT
0.925V TO 2V
DAC
INPUTS
BATTERY
2.5V TO 28V
Minimal Operating Circuit
EVALUATION KIT
AVAILABLE
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1717EEG | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP |
| MAX1718EEI | Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II |
| MAX1718 | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP -40 to 85 |
| MAX1718BEEI | Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II |
| MAX1720EUTG | Switched Capacitor Voltage Inverter with Shutdown |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX17175ETG+ | 制造商:Maxim Integrated Products 功能描述:BOOST REG W/INTEGRATED CHARGE PUMPS SWITCH CONTROL & HIGH-CU - Rail/Tube |
| MAX1717BEEG | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| MAX1717BEEG+ | 功能描述:DC/DC 開關控制器 Adj Synchronous Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| MAX1717BEEG+T | 功能描述:DC/DC 開關控制器 Adj Synchronous Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| MAX1717BEEG-T | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
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