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参数资料
| 型号： | TC115301EMT |
| 元件分类： | 稳压器 |
| 英文描述： | 0.4 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | SOT-89, 5 PIN |
| 文件页数： | 1/12页 |
| 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC115301EMTTR | 功能描述:开关变换器、稳压器与控制器 PFM/PWM Step-Up RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TC115331ECT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PFM/PWM Step-Up DC/DC Converter |
| TC115331EMTTR | 功能描述:开关变换器、稳压器与控制器 PFM/PWM Step-Up RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TC115501ECT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PFM/PWM Step-Up DC/DC Converter |
| TC115501EMTTR | 功能描述:开关变换器、稳压器与控制器 PFM/PWM Step-Up RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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