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MAX5035_09

更新时间： 2024-11-05 05:49:07
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
17页 299K
描述
1A, 76V, High-Efficiency MAXPower Step-Down DC-DC Converter

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19-2988; Rev 3; 5/09  
1A, 76V, High-Efficiency MAXPower  
Step-Down DC-DC Converter  
MAX035  
General Description  
Features  
The MAX5035 easy-to-use, high-efficiency, high-volt-  
age, step-down DC-DC converter operates from an  
input voltage up to 76V and consumes only 270µA qui-  
escent current at no load. This pulse-width modulated  
(PWM) converter operates at a fixed 125kHz switching  
frequency at heavy loads, and automatically switches  
to pulse-skipping mode to provide low quiescent cur-  
rent and high efficiency at light loads. The MAX5035  
includes internal frequency compensation simplifying  
circuit implementation. The device uses an internal low-  
on-resistance, high-voltage, DMOS transistor to obtain  
high efficiency and reduce overall system cost. This  
device includes undervoltage lockout, cycle-by-cycle  
current limit, hiccup mode output short-circuit protec-  
tion, and thermal shutdown.  
♦ Wide 7.5V to 76V Input Voltage Range  
♦ Fixed (3.3V, 5V, 12V) and Adjustable  
(1.25V to 13.2V) Versions  
♦ 1A Output Current  
♦ Efficiency Up to 94%  
♦ Internal 0.4Ω High-Side DMOS FET  
♦ 270µA Quiescent Current at No Load, 10µA  
Shutdown Current  
♦ Internal Frequency Compensation  
♦ Fixed 125kHz Switching Frequency  
♦ Thermal Shutdown and Short-Circuit Current  
The MAX5035 delivers up to 1A output current. The out-  
put current may be limited by the maximum power dis-  
sipation capability of the package. External shutdown is  
included, featuring 10µA (typ) shutdown current. The  
MAX5035A/B/C versions have fixed output voltages of  
3.3V, 5V, and 12V, respectively, while the MAX5035D  
features an adjustable output voltage from 1.25V to  
13.2V.  
Limit  
♦ 8-Pin SO and PDIP Packages  
Ordering Information  
OUTPUT  
VOLTAGE  
(V)  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
MAX5035AUSA  
MAX5035AUPA  
MAX5035AASA  
0°C to +85°C  
0°C to +85°C  
8 SO  
The MAX5035 is available in space-saving 8-pin SO  
and 8-pin plastic DIP packages and operates over the  
automotive (-40°C to +125°C) temperature range.  
8 PDIP  
3.3  
5.0  
-40°C to +125°C 8 SO  
MAX5035AASA/V+ -40°C to +125°C 8 SO  
Applications  
MAX5035BUSA  
MAX5035BUPA  
MAX5035BASA  
0°C to +85°C  
0°C to +85°C  
8 SO  
8 PDIP  
Automotive  
-40°C to +125°C 8 SO  
Consumer Electronics  
Industrial  
MAX5035BASA/V+ -40°C to +125°C 8 SO  
+Denotes lead(Pb)-free/RoHS-compliant package.  
Ordering Information continued at end of data sheet.  
Distributed Power  
Typical Operating Circuit  
Pin Configuration  
V
IN  
7.5V TO 76V  
TOP VIEW  
V
IN  
68μF  
BST  
LX  
0.1μF  
100μH  
MAX5035  
V
5V  
OUT  
BST  
VD  
1
2
3
4
8
7
6
5
LX  
R1  
R2  
D1  
50SQ100  
V
IN  
MAX5035  
ON/OFF  
68μF  
SGND  
FB  
GND  
ON  
FB  
ON/OFF  
VD  
OFF  
SGND  
GND  
0.1μF  
SO/PDIP  
________________________________________________________________ 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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