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| 型号： | MAX8664AEEP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR DUAL OUT 20-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电源 |
| 电流 - 电源： | 1.4mA |
| 电源电压： | 4.5 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-QSOP |
| 包装： | 带卷 (TR) |
ATION
EVALU
AVAILA
19-0796; Rev 0; 4/07
KIT
B LE
Low-Cost, Dual-Output, Step-Down
Controller with Fast Transient Response
General Description
The MAX8664 dual-output PWM controller is a low-cost,
high-performance solution for systems requiring dual
power supplies. It provides two individual outputs that
operate 180° out-of-phase to minimize input current
ripple, and therefore, capacitance requirements. Built-in
drivers are capable of driving external MOSFETs to
deliver up to 25A output current from each channel.
The MAX8664 operates from a 4.5V to 28V input volt-
age source and generates output voltages from 0.6V
up to 90% of the input voltage on each channel. Total
output regulation error is less than ±0.8% over load,
line, and temperature.
The MAX8664 operates with a constant switching fre-
quency adjustable from 100kHz to 1MHz. Built-in boost
diodes reduce external component count. Digital soft-
start eliminates input inrush current during startup. The
second output has an optional external REFIN2, facili-
tating tracking supply applications. Each output is
capable of sourcing and sinking current, making the
device a great solution for DDR applications.
Features
o ±0.8% Output Accuracy Over Load and Line
o Operates from a Single 4.5V to 28V Supply
o Simple Compensation for Any Type of Output
Capacitor
o Internal 6.5V Regulator for Gate Drive
o Integrated Boost Diodes
o Adjustable Output from 0.6V to 0.9 x V IN
o Digital Soft-Start Reduces Inrush Current
o 100kHz to 1MHz Adjustable Switching
o 180° Out-of-Phase Operation Reduces Input
Ripple Current
o Overcurrent and Overvoltage Protection
o External Reference Input for Second Controller
o Prebiased Startup Operation
Ordering Information
The MAX8664 employs Maxim’s proprietary peak volt-
age-mode control architecture that provides superior
transient response during either load or line transients.
PART
MAX8664A EEP+
PIN-
PACKAGE
20 QSOP
PKG
CODE
E20-1
FAULT
ACTION
Independent
This architecture is easily stabilized using two resistors
and one capacitor for any type of output capacitors. Fast
transient response requires less output capacitance,
consequently reducing total system cost. The MAX8664B
latches off both controllers during a fault condition, while
the MAX8664A allows one controller to continue to func-
tion when there is a fault in the other controller.
MAX8664B EEP+ 20 QSOP E20-1 Joint
Note: This device operates over the -40°C to +85°C operating
temperature range.
+Denotes lead-free package.
Typical Operating Circuit
Applications
IN2
IN
VL
Desktop and Notebook PCs
OUT2
ILIM2
ILIM1
IN1
OUT1
Graphic Cards
ASIC/CPU/DSP Power Supplies
Set-Top Box Power Supply
Printer Power Supply
Network Power Supply
DH2
BST2
LX2
DL2
DH1
BST1
LX1
DL1
POL Power Supply
GND
FB2
MAX8664
PGND
FB1
Pin Configuration appears at end of data sheet.
REFIN2
V CC
PWRGD
OSC/EN12
________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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