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MAX8514AEI-T

更新时间： 2024-11-28 21:22:19
品牌 Logo 应用领域
美信 - MAXIM 信息通信管理开关光电二极管
页数 文件大小 规格书
35页 1025K
描述
Switching Controller, Voltage-mode, 1460kHz Switching Freq-Max, BICMOS, PDSO28, 0.150 INCH, 0.250 INCH PITCH, MO-137AF, QSOP-28

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MAX8514AEI-T 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SSOP
包装说明：SSOP,针数：28
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.85
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：4.5 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G28长度：9.89 mm
功能数量：1端子数量：28
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.73 mm表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：1460 kHz
技术：BICMOS温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3.9 mmBase Number Matches：1

MAX8514AEI-T 数据手册

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19-3178; Rev 0; 2/04  
Wide-Input, High-Frequency, Triple-Output Supplies  
with Voltage Monitor and Power-On Reset  
General Description  
Features  
The MAX8513/MAX8514 integrate a voltage-mode  
PWM step-down DC-DC controller and two LDO con-  
trollers, a voltage monitor, and a power-on reset for the  
lowest-cost power-supply and monitoring solution for  
xDSL modems, routers, gateways, and set-top boxes.  
♦ Low-Cost DC-DC Controller with Two LDOs  
♦ Wide Input Range: 4.5V to 28V  
♦ 300kHz to 1.4MHz Adjustable Switching  
Frequency  
♦ Low Noise for High Data-Rate xDSL Applications  
♦ Synchronizable to External Clock  
♦ Adjustable Soft-Start  
The DC-DC controller switching frequency can be set  
with an external resistor from 300kHz to 1.4MHz, to allow  
for the optimization of cost, size, and efficiency. For noise-  
sensitive applications, the DC-DC controller can also be  
synchronized to an external clock, minimizing noise inter-  
ference. Operation above 1.1MHz reduces noise for high  
data-rate xDSL applications. An adjustable soft-start and  
adjustable foldback current limit provide reliable startup  
and fault protection. The DC-DC controller output voltage  
can be set externally to a voltage from 1.25V to 5.5V.  
Current limiting is accomplished by inductor current sens-  
ing for improved efficiency, or by an external sense resis-  
tor for better accuracy.  
♦ Lossless Adjustable Foldback Current Limit  
♦ Power-On Reset with 140ms Delay  
♦ Adjustable Input Power-Fail Warning for Dying  
Gasp  
♦ Selectable Output-Voltage Sequencing or  
Output-Voltage Tracking  
Ordering Information  
The MAX8513/MAX8514s’ first LDO controller is  
designed to provide a low-cost, high-current regulated  
output from 0.8V to 5.5V using an N-channel MOSFET or  
a low-current output using a low-cost NPN transistor. The  
MAX8513’s second regulator can be used to generate  
0.8V to 27V output with a low-cost PNP transistor. Both  
LDO regulators can operate either from the DC-DC con-  
troller output or from a higher voltage derived with a fly-  
back overwinding on the DC-DC converter inductor. The  
MAX8514’s second LDO regulator is designed to pro-  
vide a negative output with an NPN transistor.  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
MAX8513EEI  
MAX8514EEI  
MAX8514AEI  
28 QSOP  
28 QSOP  
-40°C to +125°C 28 QSOP  
Functional Diagram  
V
IN  
(4.5V TO 28V)  
A sequence input allows the outputs to either power up  
together, or for the DC-DC regulator to power up first  
and each LDO controller to power up in sequence. An  
input power-fail output (PFO) is provided for input  
power-fail warning, such as in dying-gasp applications.  
A power-on reset circuit with a 140ms delay is also  
included to indicate when all outputs have achieved  
regulation and stabilized.  
MAX8513  
ON  
OFF  
V
OUT1  
STEP-  
DOWN  
(1.25V TO 5.5V)  
CONTROLLER  
SYNC  
Applications  
xDSL, Cable, ISDN Modems, and Routers  
Wireless Routers  
OUTPUT  
POWER-ON RESET  
LDO  
CONTROLLER 1  
V
OUT2  
(0.8V TO V  
)
OUT1  
Set-Top Boxes  
Automotive Dashboard Electronics  
INPUT POWER-  
FAIL MONITOR  
LDO  
CONTROLLER 2  
V
OUT3  
Pin Configurations appear at end of data sheet.  
(0.8V TO 27V)  
________________________________________________________________ Maxim Integrated Products  
1
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.  
1234567...35

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