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| 型号： | MAX8554EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR BUCK PWM 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，DDR，DDR2 |
| 输入电压： | 4.5 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 3.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
19-3017; Rev 1; 5/05
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
General Description
The MAX8553 is a 4.5V to 28V input-voltage, synchro-
nous step-down controller that provides a complete
power-management solution for DDR memory. The
MAX8553 generates 1/2 V REFIN voltage for VTT and
VTTR. The VTT and VTTR tracking voltages are main-
tained within 1% of 1/2 V REFIN . The MAX8554 is a 4.5V to
28V input voltage, nontracking step-down controller with
a low 0.6V feedback threshold voltage. The MAX8553/
MAX8554 use Maxim’s proprietary Quick-PWM? archi-
tecture for fast transient response and operate with
selectable pseudo-fixed frequencies. Both controllers
can operate without an external bias supply.
The controllers operate in synchronous-rectification mode
to ensure balanced current sourcing and sinking capabili-
ty of up to 25A. The MAX8553/MAX8554 also provide up
to 95% efficiency, making them ideal for server and point-
of-load applications. Additionally, a low 5μA shutdown
current allows for longer battery life in notebook applica-
tions. Lossless current monitoring is achieved by monitor-
ing the low-side MOSFET’s drain-to-source voltage. The
MAX8553/MAX8554 have an adjustable foldback current
limit to withstand a continuous output overload and short
circuit. Digital soft-start provides control of inrush current
during power-up. Overvoltage protection shuts the con-
verter down and discharges the output capacitor. The
MAX8553/MAX8554 come in space-saving 16-pin QSOP
packages.
Features
? Up to 25A Output-Current Capability
? Quick-PWM Control for Fast Loop Response
? Up to 95% Efficiency
? 4.5V to 28V Input Voltage Range
? No External Bias Supply Required
? 0 to 3.6V Input REFIN Range (MAX8553)
? Automatically Sets VTT and VTTR to within ± 1%
of 1/2 V REFIN - (MAX8553)
? Low 0.6V Feedback Threshold (MAX8554)
? 200kHz/300kHz/400kHz/550kHz Selectable
Switching Frequencies
? Adjustable Foldback Current Limit
? Overvoltage Protection
? Digital Soft-Start
Typical Operating Circuit
VIN
+5V
EN/HSD
DH
Wide-Input Power Supplies
Applications
POK
POK
MAX8553
VL
Servers and Storage Applications
REFIN
ASIC and CPU Core Voltages
REFIN
BST
VOUT
Notebook and LCD-PC Power Supplies
V+
V+
LX
DDR I and DDR II Memory Power Supplies
AGTL Bus Termination Supplies
Ordering Information
REF
ILIM
DL
PGND
PART
TEMP RANGE
PIN-PACKAGE
FSEL
VTT
MAX8553 EEE
-40 ° C to +85 ° C
16 QSOP
GND
VTTR
VTTR
MAX8554 EEE
-40 ° C to +85 ° C
16 QSOP
Pin Configurations appear at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ 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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| MAX8555AEUB+ | 功能描述:功率驱动器IC .5-3.3V ORing MOSFET Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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