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| 型号： | MAX1717EEG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/33页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 24-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
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19-1636; Rev 3; 8/05
ATION
ILABLE
EVALU
AVA
KIT
Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
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
Features
? Quick-PWM Architecture
? ±1% V OUT Accuracy Over Line and Load
? 5-Bit On-Board DAC with Input Mux
? Precision-Adjustable V OUT Slew Control
? 0.925V to 2V Output Adjust Range
? Supports Voltage-Positioned Applications
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
?
?
?
?
2V to 28V Battery Input Range
Requires a Separate +5V Bias Supply
200/300/550/1000kHz Switching Frequency
Over/Undervoltage Protection
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
? Drives Large Synchronous-Rectifier FETs
? 700μA (typ) I CC Supply Current
? 2μA (typ) Shutdown Supply Current
? 2V ±1% Reference Output
? VGATE Transition-Complete Indicator
? Small 24-Pin QSOP Package
Ordering Information
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.
PART
MAX1717EEG
MAX1717EEG+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 QSOP
24 QSOP
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-
+ Denotes lead-free package.
Minimal Operating Circuit
BATTERY
mum possible physical size.
+5V INPUT
MAX1717
2.5V TO 28V
The MAX1717 is available in a 24-pin QSOP package.
V CC
V DD
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
SKP/SDN
FBS
ILIM
GNDS
A/B
REF
TON
CC
V+
BST
DH
LX
DL
OUTPUT
0.925V TO 2V
Pin Configuration appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products.
SpeedStep is a trademark of Intel Corp.
DAC
INPUTS
D0
D1
D2
D3
D4
GND
FB
TIME
VGATE
________________________________________________________________ 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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1717EEG+ | 功能描述:DC/DC 开关控制器 Adj Synchronous Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1717EEG+C71058 | 功能描述:DC/DC 开关控制器 Step-Down Controller for Notebook CPU RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1717EEG+T | 功能描述:DC/DC 开关控制器 Adj Synchronous Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1717EEG-C71058 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1717EEG-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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