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參數資料
| 型號： | TC115331ECT |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | PFM/PWM Step-Up DC/DC Converter |
| 中文描述： | 烤瓷/ PWM升壓型DC / DC轉換器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 355K |
| 代理商： | TC115331ECT |
2003 Microchip Technology Inc.
DS21361C-page 1
M
TC115
Features
High Efficiency at Low Output Load Currents via
PFM Mode
Assured Start-up at 0.9V
80 μA (Typ) Supply Current
85% Typical Efficiency at 100 mA
140 mA Typical Output Current @ V
IN
=
2.0V
Low Power Shutdown Mode
No External Switching Transistor Needed
Space-Saving SOT-89 Package
Applications
Pagers
Cellular Phones
Palmtops
1-Cell to 3-Cell Battery Powered Systems
Cameras, Video Recorders
Local +3V to +5V Supplies
Package Type
General Description
The TC115 is a high-efficiency step-up DC/DC
converter for small, low input voltage or battery-
powered systems. This device has a start-up voltage
of 0.9V and a typical supply current of 80 μA. Phase
compensation and soft-start circuitry are included on-
chip. Unlike conventional PWM step-up converters,
the TC115 automatically shifts to pulse frequency
modulation (PFM) at low loads, resulting in reduced
supply current and improved efficiency.
The TC115 requires only an external diode, an inductor
and a capacitor, while supporting typical output cur-
rents of 140 mA. Supply current is reduced to less than
0.5 μA (max) when SHDN input is brought low.
Small size, low installed cost and low supply current
make the TC115 step-up converter ideal for use in a
wide range of battery-powered systems.
Functional Block Diagram
5
4
TC115
1
3
2
GND
LX
NC
PS
SHDN
SOT-89-5
PS
1.5V
C
1
10 μF
L
1
100 μH
Sumida
CD-54
1.5V to +3V, 50 mA Supply
5
4
TC115
1
3
2
SHDN
PS
NC
C
2
47 μF
Tantalum
IN5817
D
1
GND
LX
+3V
OUT
+
+
+
PS
PFM/PWM Step-Up DC/DC Converter
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC115331EMTTR | 功能描述:開關變換器、穩(wěn)壓器與控制器 PFM/PWM Step-Up RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TC115501ECT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PFM/PWM Step-Up DC/DC Converter |
| TC115501EMTTR | 功能描述:開關變換器、穩(wěn)壓器與控制器 PFM/PWM Step-Up RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TC115A | 制造商:Thomas & Betts 功能描述:1 1/2" Compression Connector, Steel-Zinc Plated, Concrete tight 制造商:Thomas & Betts 功能描述:Fittings Connector 1.5inch Steel |
| TC115A-RT | 制造商:Thomas & Betts 功能描述:Fittings Connector 1.5inch Male Steel |
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