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MAX17501EATB+ PDF预览

MAX17501EATB+

更新时间： 2024-11-14 11:50:27
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
16页 2992K
描述
60V, 500mA, Ultra-Small, High-Efficiency,Synchronous Step-Down DC-DC Converter

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MAX17501EATB+ 数据手册

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19-6244; Rev 0; 5/12  
E V A L U A T I O N K I T A V A I L A B L E  
General Description  
Benefits and Features  
The MAX17501 high-efficiency, high-voltage, synchro-  
nous step-down DC-DC converter operates over a 4.5V to  
60V input voltage range and is designed for a wide range  
of applications. The ultra-wide-input operation makes it  
ideal for not only industrial control and building automa-  
tion, but also base stations, telecom, home entertainment  
and automotive applications. It delivers output currents  
up to 500mA, at output voltages of 3.3V and 5V. The out-  
put voltage is accurate within Q1.6% over temperature.  
The device operates over the -40NC to +125NC industrial  
temperature range and is available in a tiny, 10-pin (3mm  
x 2mm) TDFN with an exposed pad.  
S Eliminate External Components and Reduce Total  
Cost  
No Schottky-Synchronous Operation for High  
Efficiency and Reduced Cost  
Internal Compensation for Ultra-Compact  
Layout  
All-Ceramic Capacitors  
S Reduce Number of DC-DC Regulators to Stock  
Wide 4.5V to 60V Operating-Voltage Range  
Fixed 3.3V and 5V Output  
Delivers Up to 500mA Over Temperature  
600kHz Switching Frequency  
The device features peak-current-mode control with  
pulse-width modulation (PWM). The PWM operation  
ensures constant switching frequency at all operating  
conditions. The low-resistance, on-chip, pMOS/nMOS  
switches ensure high efficiency at full load while minimiz-  
ing the critical inductances, making the layout a much  
simpler task compared to discrete solutions.  
S Reduce Power Dissipation  
Peak Efficiency > 90%  
Shutdown Current = 1µA (typ)  
S Operate Reliably in Adverse Industrial Environments  
Hiccup-Mode Current Limit and Autoretry Startup  
Built-In Output-Voltage Monitoring (Open-Drain  
RESET Pin)  
The device offers fixed switching frequency of 600kHz. To  
reduce input inrush current, the device offers an adjust-  
able voltage soft-start feature with an external capacitor  
from the SS pin to ground. The device also incorporates  
an output enable/undervoltage lockout pin (EN/UVLO)  
that allows the user to turn on the part at the desired  
input-voltage level. An open-drain RESET pin provides a  
delayed power-good signal to the system upon achieving  
successful regulation of the output voltage. The device  
supports hiccup-mode current-limit protection for low  
power dissipation under overload and output short-circuit  
conditions.  
Resistor-Programmable UVLO Threshold  
Increased Safety with Adjustable Soft-Start and  
Prebiased Power-Up  
Optional Adjustable Output and PFM (Available  
Upon Factory Request)  
-40NC to +125NC Industrial Temperature Range  
Typical Operating Circuit  
L1  
47µH  
V
V
OUT  
5V, 500mA  
IN  
24V 20%  
V
LX  
IN  
Applications  
C1  
1µF  
1206  
C4  
10µF, 6.3V  
1206  
R1  
3.32MI  
1
2
3
Industrial Process Control  
HVAC and Building Control  
General-Purpose Point-of-Load  
Base Station, VOIP, Telecom  
Home Theater  
PGND  
EN/UVLO  
JU1  
R2  
866kI  
MAX17501F  
GND  
V
CC  
C2  
1µF  
FB/VO  
RESET  
SS  
C3  
3300pF  
Automotive  
N.C.  
RESET  
Battery-Powered Equipment  
Ordering Information appears at end of data sheet.  
For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX17501.related.  
����������������������������������������������������������������� Maxim Integrated Products  
1
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.  
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MAX17501EATB+ 替代型号

型号 品牌 替代类型 描述 数据表
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