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TC110 PDF预览

TC110

更新时间: 2024-11-07 22:42:27
品牌 Logo 应用领域
美国微芯 - MICROCHIP 控制器
页数 文件大小 规格书
16页 466K
描述
PFM/PWM Step-Up DC/DC Controller

TC110 数据手册

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TC110  
PFM/PWM Step-Up DC/DC Controller  
Features  
General Description  
• Assured Start-up at 0.9V  
The TC110 is a step-up (Boost) switching controller  
that furnishes output currents of up to 300mA while  
delivering a typical efficiency of 84%. The TC110  
normally operates in pulse width modulation mode  
(PWM), but automatically switches to pulse frequency  
modulation (PFM) at low output loads for greater  
efficiency. Supply current draw for the 100kHz version  
is typically only 50µA, and is reduced to less than  
0.5µA when the SHDN input is brought low. Regulator  
operation is suspended during shutdown. The TC110  
accepts input voltages from 2.0V to 10.0V, with a  
guaranteed start-up voltage of 0.9V.  
• 50µA (Typ) Supply Current (f  
• 300mA Output Current @ V 2.7V  
• 0.5µA Shutdown Mode  
• 100kHz and 300kHz Switching Frequency  
Options  
= 100kHz)  
OSC  
IN  
• Programmable Soft-Start  
• 84% Typical Efficiency  
• Small Package: 5-Pin SOT-23A  
Applications  
The TC110 is available in a small 5-Pin SOT-23A  
package, occupies minimum board space and uses  
small external components (the 300kHz version allows  
for less than 5mm surface-mount magnetics).  
• Palmtops  
• Battery-Operated Systems  
• Positive LCD Bias Generators  
• Portable Communicators  
Functional Block Diagram  
Device Selection Table  
+
+
Battery  
10µF  
D1  
IN5817  
47µH  
3V  
Output  
Voltage  
(V)*  
Osc.  
Freq.  
(kHz)  
Operating  
Temp.  
Range  
Part  
Number  
V
Package  
OUT  
Si9410DY  
+
47µF  
Tantalum  
TC110501ECT  
TC110331ECT  
TC110301ECT  
TC110503ECT  
TC110333ECT  
TC110303ECT  
5.0  
3.3  
3.0  
5.0  
3.3  
3.0  
5-Pin SOT-23A 100 -40°C to +85°C  
5-Pin SOT-23A 100 -40°C to +85°C  
5-Pin SOT-23A 100 -40°C to +85°C  
5-Pin SOT-23A 300 -40°C to +85°C  
5-Pin SOT-23A 300 -40°C to +85°C  
5-Pin SOT-23A 300 -40°C to +85°C  
5
4
EXT  
GND  
TC110  
V
V
SHDN/SS  
3
OUT  
DD  
1
2
*Other output voltages are available. Please contact  
Microchip Technology Inc. for details.  
R
OFF  
ON  
C
Package Type  
*RC Optional  
3V to 5V Supply  
5-Pin SOT-23A  
EXT  
5
GND  
4
TC110  
1
2
3
V
V
SHDN/SS  
OUT  
DD  
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A  
2002 Microchip Technology Inc.  
DS21355B-page 1  

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