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TC105303ECT PDF预览

TC105303ECT

更新时间: 2024-11-07 22:42:27
品牌 Logo 应用领域
美国微芯 - MICROCHIP 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
14页 434K
描述
PFM/PWM Step-Down DC/DC Controller

TC105303ECT 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOT-23A
包装说明:SOT-23A, 5 PIN针数:5
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.16
Is Samacsys:N其他特性:PFM CONTROL TECHNIQUE IS ALSO POSSIBLE
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:10 V
最小输入电压:2.2 VJESD-30 代码:R-PDSO-G5
JESD-609代码:e3长度:2.9 mm
湿度敏感等级:1功能数量:1
端子数量:5最高工作温度:85 °C
最低工作温度:-40 °C最大输出电流:0.1 A
封装主体材料:PLASTIC/EPOXY封装代码:LSSOP
封装等效代码:TSOP5/6,.11,37封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, LOW PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.45 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:345 kHz
温度等级:INDUSTRIAL端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:0.95 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:1.65 mmBase Number Matches:1

TC105303ECT 数据手册

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TC105  
PFM/PWM Step-Down DC/DC Controller  
Features  
Package Type  
5-Pin SOT-23A  
• 57µA (Typ) Supply Current  
• 1A Output Current  
V
SHDN  
4
OUT  
5
• 0.5µA Shutdown Mode  
• 300kHz Switching Frequency for Small Inductor  
Size  
• Programmable Soft-Start  
• 92% Typical Efficiency  
TC105  
• Small Package: 5-Pin SOT-23A  
1
2
3
V
EXT  
GND  
DD  
Applications  
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A  
• Palmtops  
• Battery-Operated Systems  
• Portable Instruments  
• Positive LCD Bias Generators  
• Portable Communicators  
• Hand-Held Scanners  
• 5V to 3V Down Converters  
General Description  
The TC105 is a step-down (Buck) switching controller  
that furnishes output currents of up to 1A (max) while  
delivering a typical efficiency of 92%. The TC105  
normally operates in pulse width modulation mode  
(PWM), but automatically switches to pulse frequency  
modulation (PFM) at low output loads for greater  
efficiency. Oscillator frequency is 300kHz, allowing use  
of small (22µH) inductors. Supply current draw is only  
102µA (max), and is reduced to less than 0.5µA when  
the SHDN input is brought low. Regulator operation is  
suspended during shutdown. The TC105 accepts a  
maximum input voltage of 10V.  
Device Selection Table  
Output  
Voltage  
(V)*  
Osc.  
Freq.  
(kHz)  
Operating  
Temp.  
Range  
Part  
Number  
Package  
TC105503ECT  
TC105333ECT  
TC105303ECT  
5.0  
3.3  
3.0  
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  
The TC105 is available in a small 5-Pin SOT-23A  
package, occupies minimum board space and is ideal  
for a wide range of applications.  
*Other output voltages are available. Please contact  
Microchip Technology Inc. for details.  
Functional Block Diagram  
L
1
22µH (Sumida CD54)  
3.3V  
V
OUT  
R
470K  
SS  
OFF  
C2  
ON  
D
47µF  
1
(From System  
Control Logic)  
C
MA737  
SS  
10V  
0.033µF  
Tantalum  
5
4
V
SHDN  
OUT  
TC105333ECT  
V
EXT  
1
DD  
2
GND  
3
Si 9430  
P
+
V
BATT  
6V  
C
10µF/16V  
1
NiMH  
3.3V Regulated Supply Using 6V  
NiMH Battery Pack Input  
2002 Microchip Technology Inc.  
DS21349B-page 1  

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