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MAX5033

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 291K
描述
500mA, 76V, High-Efficiency, MAXPower Step-Down DC-DC Converter

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MAX5033 数据手册

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19-2979; Rev 2; 5/04  
500mA, 76V, High-Efficiency, MAXPower  
Step-Down DC-DC Converter  
General Description  
Features  
ꢀ Wide 7.5V to 76V Input Voltage Range  
The MAX5033 easy-to-use, high-efficiency, high-voltage,  
step-down DC-DC converter operates from an input volt-  
age up to 76V and consumes only 270µA quiescent cur-  
rent at no load. This pulse-width modulated (PWM)  
converter operates at a fixed 125kHz switching frequen-  
cy at heavy loads, and automatically switches to pulse-  
skipping mode to provide low quiescent current and  
high efficiency at light loads. The MAX5033 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 protection, and  
thermal shutdown.  
ꢀ Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to  
13.2V) Voltage Versions  
ꢀ 500mA 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 Limit  
ꢀ 8-Pin SO and PDIP Packages  
Ordering Information  
The MAX5033 delivers up to 500mA output current.  
The output current may be limited by the maximum  
power dissipation capability of the package. External  
shutdown is included, featuring 10µA (typ) shutdown  
current. The MAX5033A/B/C versions have fixed output  
voltages of 3.3V, 5V, and 12V, respectively, while the  
MAX5033D features an adjustable output voltage, from  
1.25V to 13.2V.  
OUTPUT  
VOLTAGE  
(V)  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
MAX5033AUSA  
MAX5033AUPA  
MAX5033AASA  
MAX5033BUSA  
MAX5033BUPA  
MAX5033BASA  
MAX5033CUSA  
MAX5033CUPA  
MAX5033CASA  
MAX5033DUSA  
MAX5033DUPA  
MAX5033DASA  
0°C to +85°C  
0°C to +85°C  
8 SO  
8 PDIP  
3.3  
5.0  
12  
-40°C to +125°C 8 SO  
The MAX5033 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.  
0°C to +85°C  
0°C to +85°C  
8 SO  
8 PDIP  
-40°C to +125°C 8 SO  
0°C to +85°C  
0°C to +85°C  
8 SO  
Applications  
8 PDIP  
-40°C to +125°C 8 SO  
Automotive  
0°C to +85°C  
0°C to +85°C  
8 SO  
Consumer Electronics  
Industrial  
8 PDIP  
ADJ  
-40°C to +125°C 8 SO  
Distributed Power  
Typical Operating Circuit  
Pin Configuration  
V
IN  
7.5V TO 76V  
V
IN  
47µF  
BST  
LX  
0.1µF  
BST  
1
2
3
4
8
7
6
5
LX  
220µH  
MAX5033  
V
OUT  
5V, 0.5A  
VD  
SGND  
FB  
V
IN  
R1  
R2  
MAX5033  
D1  
50SQ100  
GND  
ON/OFF  
33µF  
ON/OFF  
ON  
FB  
VD  
SO/PDIP  
OFF  
SGND  
GND  
0.1µF  
________________________________________________________________ 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...17

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