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MAX5035

更新时间： 2024-09-14 22:35:15
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
17页 382K
描述
1A, 76V, High-Efficiency MAXPower Step-Down DC-DC Converter

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MAX5035 数据手册

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19-2988; Rev 0; 9/03  
1A, 76V, High-Efficiency MAXPower  
Step-Down DC-DC Converter  
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 350µA 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  
ꢀ 350µA 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. 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  
The MAX5035 is available in space-saving 8-pin SO  
and 8-pin plastic DIP packages and operates over the  
industrial (0°C to +85°C) temperature range.  
OUTPUT  
VOLTAGE  
(V)  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
MAX5035AUSA  
MAX5035AUPA  
MAX5035BUSA  
MAX5035BUPA  
MAX5035CUSA  
MAX5035CUPA  
MAX5035DUSA  
MAX5035DUPA  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
0°C to +85°C  
8 SO  
3.3  
5.0  
12  
8 PDIP  
8 SO  
Applications  
Consumer Electronics  
Industrial  
8 PDIP  
8 SO  
8 PDIP  
8 SO  
Distributed Power  
ADJ  
8 PDIP  
Typical Operating Circuit  
V
IN  
Pin Configuration  
7.5V TO 76V  
V
IN  
68µF  
BST  
LX  
0.1µF  
100µH  
TOP VIEW  
MAX5035  
V
OUT  
5V  
R1  
R2  
D1  
BST  
VD  
1
2
3
4
8
7
6
5
LX  
50SQ100  
ON/OFF  
V
IN  
68µF  
MAX5035  
ON  
FB  
SGND  
FB  
GND  
VD  
OFF  
SGND  
GND  
ON/OFF  
0.1µF  
SO/PDIP  
________________________________________________________________ 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.  
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