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MAX757CSA-T

更新时间: 2024-11-29 13:11:03
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美信 - MAXIM 转换器
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MAX757CSA-T 数据手册

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19-0113; Rev. 2; 1/95  
3 .3 V/5 V/Ad ju s t a b le -Ou t p u t ,  
S t e p -Up DC-DC Co n ve rt e rs  
6/MAX57  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
Operates Down to 0.7V Input Supply Voltage  
87% Efficiency at 200mA  
The MAX756/MAX757 are CMOS step-up DC-DC switch-  
ing regulators for small, low input voltage or battery-pow-  
ered systems. The MAX756 accepts a positive input  
voltage down to 0.7V and converts it to a higher pin-  
selectable output voltage of 3.3V or 5V. The MAX757 is  
an adjustable version that accepts an input voltage down  
to 0.7V and generates a higher adjustable output voltage  
in the range from 2.7V to 5.5V. Typical full-load efficiencies  
for the MAX756/MAX757 are greater than 87%.  
60µA Quiescent Current  
20µA Shutdown Mode with Active Reference and  
LBI Detector  
500kHz Maximum Switching Frequency  
±1.5% Reference Tolerance Over Temperature  
Low-Battery Detector (LBI/LBO)  
The MAX756/MAX757 provide three improvements over  
previous devices. Physical size is reducedthe high  
switching frequencies (up to 0.5MHz) made possible by  
MOSFET power transistors allow for tiny (<5mm diameter)  
surface-mount magnetics. Efficiency is improved to 87%  
(10% better than with low-voltage regulators fabricated in  
bipolar technology). Supply current is reduced to 60µA  
by CMOS construction and a unique constant-off-time  
pulse-frequency modulation control scheme.  
8-Pin DIP and SO Packages  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
MAX756CPA  
MAX756CSA  
MAX756C/D  
MAX756EPA  
MAX756ESA  
MAX757CPA  
MAX757CSA  
MAX757C/D  
MAX757EPA  
MAX757ESA  
________________________Ap p lic a t io n s  
3.3V to 5V Step-Up Conversion  
Palmtop Computers  
Dice*  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
Portable Data-Collection Equipment  
Personal Data Communicators/Computers  
Medical Instrumentation  
Dice*  
8 Plastic DIP  
8 SO  
2-Cell & 3-Cell Battery-Operated Equipment  
Glucose Meters  
* Dice are tested at T = +25°C only.  
A
_________________P in Co n fig u ra t io n s  
__________Typ ic a l Op e ra t in g Circ u it  
INPUT  
TOP VIEW  
2V to V  
OUT  
1
2
3
4
8
7
6
5
SHDN  
3/5  
LX  
GND  
150µF  
OUTPUT  
5V at 200mA  
or  
MAX756  
22µH  
1N5817  
OUT  
LBI  
REF  
5
LBI  
LBO  
3.3V at 300mA  
8
1
SHDN  
LX  
DIP/SO  
100µF  
MAX756  
2
3
6
4
3/5  
OUT  
LBO  
1
2
3
4
8
7
6
5
SHDN  
FB  
LX  
GND  
MAX757  
LOW-BATTERY  
DETECTOR OUTPUT  
OUT  
LBI  
REF  
LBO  
REF  
GND  
7
0.1µF  
DIP/SO  
________________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .  

MAX757CSA-T 替代型号

型号 品牌 替代类型 描述 数据表
MAX757CSA+T MAXIM

完全替代

Switching Regulator, Current-mode, 1A, 500kHz Switching Freq-Max, CMOS, PDSO8, PLASTIC, SO
MAX757ESA+ MAXIM

类似代替

Switching Regulator, Current-mode, 1A, 500kHz Switching Freq-Max, CMOS, PDSO8, PLASTIC, SO

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