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| 型号： | MAX8550ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/29页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUP DDR INTEG 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 应用： | 控制器，DDR |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 2 |
| 输出电压： | 1.8V，2.5V，0.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
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EVALUATION KIT AVAILABLE
MAX8550/MAX8551
Integrated DDR Power-Supply Solutions for
Desktops, Notebooks, and Graphic Cards
General Description
The MAX8550/MAX8551 integrate a synchronous-buck
PWM controller to generate V DDQ , a sourcing and sinking
LDO linear regulator to generate V TT , and a 10mA refer-
ence output buffer to generate V TTR . The buck controller
drives two external N-channel MOSFETs to generate out-
put voltages down to 0.7V from a 2V to 28V input with out-
put currents up to 15A. The LDO can sink or source up to
1.5A continuous and 3A peak current. Both the LDO out-
put and the 10mA reference buffer output can be made
to track the REFIN voltage. These features make the
MAX8550/MAX8551 ideally suited for DDR memory appli-
cations in desktops, notebooks, and graphic cards.
The PWM controller in the MAX8550/MAX8551 utilizes
Maxim’s proprietary Quick-PWM? architecture with pro-
grammable switching frequencies of up to 600kHz. This
control scheme handles wide input/output voltage ratios
with ease and provides 100ns response to load tran-
sients while maintaining high efficiency and a relatively
constant switching frequency. The MAX8550 offers fully
programmable UVP/OVP and skip-mode options ideal in
portable applications. Skip mode allows for improved
efficiency at lighter loads. The MAX8551, which is tar-
geted towards desktop and graphic-card applications,
Features
Buck Controller
o Quick-PWM with 100ns Load-Step Response
o Up to 95% Efficiency
o 2V to 28V Input Voltage Range
o 1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable Output
o Up to 600kHz Selectable Switching Frequency
o Programmable Current Limit with Foldback
Capability
o 1.7ms Digital Soft-Start and Independent
Shutdown
o Overvoltage/Undervoltage-Protection Option
o Power-Good Window Comparator
LDO Section
o Fully Integrated VTT and VTTR Capability
o VTT has ± 3A Sourcing/Sinking Capability
o VTT and VTTR Outputs Track V REFIN / 2
o All-Ceramic Output-Capacitor Designs
o 1.0V to 2.8V Input Voltage Range
o Power-Good Window Comparator
Ordering Information
does not offer the pulse-skip feature.
The VTT and VTTR outputs track to within 1% of V REFIN / 2.
The high bandwidth of this LDO regulator allows excel-
lent transient response without the need for bulk capac-
itors, thus reducing cost and size.
The buck controller and LDO regulators are provided with
PART
MAX8550 ETI
MAX8550ETI+
MAX8551 ETI
MAX8551ETI+
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
28 5mm × 5mm TQFN
28 5mm × 5mm TQFN
28 5mm × 5mm TQFN
28 5mm × 5mm TQFN
independent current limits. Adjustable lossless foldback
current limit for the buck regulator is achieved by monitor-
ing the drain-to-source voltage drop of the low-side MOS-
FET. Additionally, overvoltage and undervoltage
protection mechanisms are built in. Once the overcurrent
condition is removed, the regulator is allowed to enter
soft-start again. This helps minimize power dissipation
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
during a short-circuit condition. The MAX8550/MAX8551
allow flexible sequencing and standby power manage-
ment using the SHDNA , SHDNB , and STBY inputs.
Both the MAX8550 and MAX8551 are available in a
small 5mm × 5mm, 28-pin thin QFN package.
Applications
DDR I and DDR II Memory Power Supplies
Desktop Computers
TON
OVP/UVP
(N.C. FOR
MAX8551)
REF
ILIM
POK1
POK2
STBY
1
2
3
4
5
6
7
+
MAX8550
MAX8551
21
20
19
18
17
16
15
DL
BST
LX
DH
V IN
OUT
FB
Notebooks and Desknotes
Graphic Cards
Game Consoles
RAID
Networking
5mm x 5mm Thin QFN
Typical Operating Circuit appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-3173; Rev 3; 4/13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8550ETI+ | 功能描述:电压模式 PWM 控制器 Integrated DDR Power Supply Solution RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8550ETI+T | 功能描述:电压模式 PWM 控制器 Integrated DDR Power Supply Solution RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8550ETI-T | 功能描述:PMIC 解决方案 RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8550EVKIT | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX8551ETI | 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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