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MAX1724

更新时间： 2024-09-17 22:57:59
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美信 - MAXIM 转换器
页数 文件大小 规格书
12页 292K
描述
1.5uA IQ, Step-Up DC-DC Converters in Thin SOT23-5

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19-1735; Rev 0; 7/01  
1.5µA I , Step-Up DC-DC Converters  
Q
in Thin SOT23-5  
General Description  
Features  
The MAX1722/MAX1723/MAX1724 compact, high-effi-  
ciency, step-up DC-DC converters are available in tiny, 5-  
pin thin SOT23 packages. They feature an extremely low  
1.5µA quiescent supply current to ensure the highest pos-  
sible light-load efficiency. Optimized for operation from  
one to two alkaline or nickel-metal-hydride (NiMH) cells, or  
a single Li+ cell, these devices are ideal for applications  
where extremely low quiescent current and ultra-small size  
are critical.  
o Up to 90% Efficiency  
o No External Diode or FETs Needed  
o 1.5µA Quiescent Supply Current  
o 0.1µA Logic-Controlled Shutdown  
o
1% ꢀutput ꢁoltage Accuracy  
o Fixed ꢀutput ꢁoltage (MAX1724) or Adjustable  
ꢀutput ꢁoltage (MAX1722/MAX1723)  
o Up to 150mA ꢀutput Current  
Built-in synchronous rectification significantly improves  
efficiency and reduces size and cost by eliminating the  
need for an external Schottky diode. All three devices fea-  
ture a 0.5Ω N-channel power switch. The MAX1722/  
MAX1724 also feature proprietary noise-reduction circuitry,  
which suppresses electromagnetic interference (EMI)  
caused by the inductor in many step-up applications. The  
family offers different combinations of fixed or adjustable  
outputs, shutdown, and EMI reduction (see Selector  
Guide).  
o 0.8ꢁ to 5.5ꢁ Input ꢁoltage Range  
o 0.91ꢁ Guaranteed Startup (MAX1722/MAX1724)  
o Internal EMI Suppression (MAX1722/MAX1724)  
o Thin SꢀT23-5 Package (1.1mm max Height)  
Ordering Information  
PIN-  
TꢀP  
PART  
TEMP. RANGE  
PACKAGE MARK  
MAX1722EZK-T  
MAX1723EZK-T  
MAX1724EZK27-T  
MAX1724EZK30-T  
MAX1724EZK33-T  
MAX1724EZK50-T  
-40°C to +85°C 5 SOT23  
-40°C to +85°C 5 SOT23  
-40°C to +85°C 5 SOT23  
-40°C to +85°C 5 SOT23  
-40°C to +85°C 5 SOT23  
-40°C to +85°C 5 SOT23  
ADQF  
ADQG  
ADQH  
ADQI  
Applications  
Pagers  
Single-Cell Battery-  
Powered Devices  
Remote Controls  
ADQJ  
ADQK  
Low-Power Hand-Held  
Instruments  
Remote Wireless  
Transmitters  
MP3 Players  
Personal  
Medical Devices  
Selector Guide  
Personal Digital  
Assistants (PDA)  
LX  
DAMPING  
Digital Still Cameras  
PART  
ꢀUTPUT (ꢁ)  
SHDN  
MAX1722EZK  
Adjustable  
Adjustable  
Fixed 2.7  
Fixed 3.0  
Fixed 3.3  
Fixed 5.0  
No  
Yes  
No  
MAX1723EZK  
Yes  
Yes  
Yes  
Yes  
Yes  
MAX1724EZK27  
MAX1724EZK30  
MAX1724EZK33  
MAX1724EZK50  
Yes  
Yes  
Yes  
Yes  
Typical Operating Circuit  
Pin Configurations  
10µH  
TOP VIEW  
IN  
BATT  
LX  
0.8V TO 5.5V  
BATT  
GND  
FB  
1
2
3
5
LX  
MAX1724  
MAX1722  
OUT  
OUT  
ON  
3.3V AT  
UP TO 150mA  
SHDN  
OFF  
4
OUT  
GND  
THIN SꢀT23-5  
Pin Configurations are continued at end of data sheet.  
________________________________________________________________ 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...12

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