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ELM93-SERIES PDF预览

ELM93-SERIES

更新时间: 2024-01-17 23:15:16
品牌 Logo 应用领域
ELM-TECH /
页数 文件大小 规格书
8页 1037K
描述
PFM step-up DC/DC converter

ELM93-SERIES 数据手册

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CMOS High efficiency PFM step-up DC/DC converter  
ELM93xxxB  
http://www.elm-tech.com  
■General description  
ELM93xxxB is CMOS step-up DC/DC converter which consists of reference voltage source, error amplifier,  
oscillation circuit, start-up circuit, PFM control circuit, switching transistor and output voltage setting resistor.  
For external parts, coil, diode and capacitor are possible choices; with external parts, ELM93 series is able to  
acquire constant output voltage higher than input voltage. The standard output voltages are 2.7V, 3.0V, and 3.3V;  
ELM93 series can also be designed as semi-custom IC within the range of 1.8V to 3.8V by 0.1V step.  
■Features  
■Application  
• Output voltage range  
• Low voltage operation  
• Low power operation  
• High efficiency  
: 1.8V to 3.8V (by 0.1V)  
: Vin≥0.9V(RL=30kΩ)  
: Typ.24μW(ELM9330xB)  
: Typ.85%  
• Constant voltage source for battery-  
operated devices  
• Constant voltage source for cameras  
• Portable communications equipments  
• Local regulator  
• High output voltage accuracy : ±2.5%  
• Output current (e.g.)  
• Package  
: 40mA(Vin=1.5V, Vout=3.0V)  
: SOT-89, SOT-23  
■Maximum absolute ratings  
Parameter  
Apply voltage to LX pin  
Apply voltage to VOUT pin  
Output current of LX pin  
Symbol  
Vlx  
Vout  
Ilx  
Limit  
5
4
Unit  
V
V
200  
mA  
500 (SOT-89)  
250 (SOT-23)  
-40 to +85  
-55 to +125  
Power dissipation  
Pd  
mW  
Operating temperature  
Storage temperature  
Top  
Tstg  
°C  
°C  
■Selection guide  
ELM93xxxB-x  
Symbol  
e.g. :  
27: Vout=2.7V  
30: Vout=3.0V  
33: Vout=3.3V  
a, b  
Output voltage  
ELM93 x x x B - x  
↑ ↑ ↑ ↑ ↑  
A: SOT-89  
B: SOT-23  
B
S: Refer to PKG file  
N: Refer to PKG file  
a b c d e  
c
d
e
Package  
Product version  
Taping direction  
Rev.1.0  
8 - 1  

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