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參數資料
| 型號： | TC115301EMT |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.4 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | SOT-89, 5 PIN |
| 文件頁數： | 1/12頁 |
| 文件大小： | 148K |
| 代理商： | TC115301EMT |
TC115-1 4/26/99
2001 Microchip Technology Inc.
DS21361A
TC115
PFM/PWM Step-up DC/DC Converter
FEATURES
s
High Efficiency at Low Output Load Currents
via PFM Mode
s
Space-Saving SOT-89 Package
s
Guaranteed Start-Up at 0.9V
s
80
A (typ.) Supply Current
s
85% (typ.) Efficiency at 100 mA
s
140 mA Typical Output Current @ VIN = 2.0V
s
Low Power Shutdown Mode
s
No External Switching Transistor Needed
TYPICAL APPLICATIONS
s
Pagers
s
Cellular Phones
s
Palmtops
s
1-Cell to 3-Cell Battery Powered Systems
s
Cameras, Video Recorders
s
Local +3V to +5V Supplies
GENERAL DESCRIPTION
The TC115 is a high-efficiency step-up DC/DC con-
verter for small, low input voltage or battery powered sys-
tems. This device has a guaranteed start-up voltage of 0.9V
and a typical supply current of 80
A. Phase compensation
and soft-start circuitry are included on-chip. Unlike conven-
tional 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, and supports typical output currents of 140
mA. Supply current is reduced to less than 0.5
A, 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.
TYPICAL OPERATING CIRCUITS
1.5V
C1
10
F
L1
100
H
Sumida
CD-54
1.5V to +3V, 50 mA Supply
5
4
TC115
1
3
2
SHDN
PS
NC
C2
47
F
Tantalum
IN5817
D1
GND
LX
+3V
OUT
ORDERING INFORMATION
Output
Osc.
Operating
Part
Voltage*
Freq.
Temp.
Number
(V)
Package
(KHz)
Range
TC115501EMT
5.0
SOT-89-5
100
– 40 to +85
°C
TC115331EMT
3.3
SOT89-5
100
– 40 to +85
°C
TC115301EMT
3.0
SOT-89-5
100
– 40 to +85
°C
NOTE: *Other output voltages available. Please contact Microchip
Technology Inc. for details.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC115301EMTTR | 功能描述:開關變換器、穩壓器與控制器 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 |
| TC115331ECT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PFM/PWM Step-Up DC/DC Converter |
| TC115331EMTTR | 功能描述:開關變換器、穩壓器與控制器 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 |
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