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参数资料
| 型号： | MAX1854EEG |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning |
| 中文描述： | SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封装： | 0.150 INCH, 0.025 INCH PITCH, QSOP-24 |
| 文件页数： | 1/33页 |
| 文件大小： | 840K |
| 代理商： | MAX1854EEG |
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General Description
The MAX1716/MAX1854/MAX1855 step-down con-
trollers are intended for core CPU DC-DC converters in
notebook computers. They feature a dynamically
adjustable output (5-bit DAC), ultra-fast transient
response, high DC accuracy, and high efficiency need-
ed 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 relative-
ly constant switching frequency.
The MAX1716/MAX1854/MAX1855 are designed
specifically for CPU core applications requiring a volt-
age-positioned supply. The voltage-positioning input
(VPS), combined with a high DC accuracy control loop,
is used to implement a power supply that modifies its
output set point in response to the load current. This
arrangement decreases full-load power dissipation and
reduces the required number of output capacitors.
The 28V input range of the MAX1716/MAX1854/MAX1855
enables single-stage buck conversion from high-volt-
age batteries for the maximum possible efficiency.
Alternatively, the devices’ high-frequency capability
combined with two-stage conversion (stepping down
the +5V system supply instead of the battery) allows
the smallest possible physical size. The output voltage
can be dynamically adjusted through the 5-bit digital-
to-analog converter (DAC) inputs.
The MAX1716/MAX1854/MAX1855 are available in a
24-pin QSOP package. For applications requiring
SpeedStep power control (see the MAX1717).
________________________Applications
Notebook Computers
Docking Stations
CPU Core Supply
Single-Stage (BATT to V
CORE
) Converters
Two-Stage (+5V to V
CORE
) Converters
Features
o
High-Efficiency Voltage Positioning
o
Quick-PWM Architecture
o
±1% V
OUT
Line-Regulation Accuracy
o
Adjustable Output Range (5-Bit DAC)
MAX1716: 0.925V to 1.6V
MAX1854: 0.925V to 2.0V
MAX1855: 0.600V to 1.75V
o
2V to 28V Input Range
o
200/300/400/550kHz Switching Frequency
o
Output Undervoltage Protection
o
Overvoltage Protection (MAX1716/MAX1855)
o
Drive Large Synchronous-Rectifier MOSFETs
o
1.7ms Digital Soft-Start
o
700
μ
A I
CC
Supply Current
o
1
μ
A Shutdown Supply Current
o
2V ±1% Reference Output
o
V
GATE
Transition-Complete Indicator
o
Small 24-Pin QSOP Package
M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
________________________________________________________________
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
19-1758; Rev 0; 8/00
Pin Configuration appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products.
SpeedStep is a trademark of Intel Corp.
Ordering Information
TEMP. RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PART
PIN-PACKAGE
24 QSOP
24 QSOP
24 QSOP
MAX1716
EEG
MAX1854
EEG
MAX1855
EEG
Typical Operating Circuit
VGATE
DH
LX
DL
CS
VPS
BST
+5V INPUT
REF
ILIM
D0
D1
D2
D3
D4
SKIP
CC
GND
PGND
FB
MAX1716
MAX1854
MAX1855
TON
V+
V
CC
SHDN
V
DD
OUTPUT
DAC
INPUTS
BATTERY
2V TO 28V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1854EEG/GG8 | 功能描述:DC/DC 开关控制器 High-Speed Adjustable Synchronous Step-Down Controllers with Integrated Voltage Positioning 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 |
| MAX1854EEG+ | 制造商:Maxim Integrated Products 功能描述:HIGH-SPEED,DIGITALLY ADJUSTABLE SYNCHRONOUS STEPDOWN CONTROL - Rail/Tube |
| MAX1854EEG+T | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MAX1854EEGT | 制造商: 功能描述: |
| MAX1854EEG-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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