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參數資料
| 型號： | TC2684EUATR |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 170 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 220K |
| 代理商： | TC2684EUATR |
2005 Microchip Technology Inc.
DS21548C-page 1
TC2682/TC2683/TC2684
Features
Small 8-Pin MSOP Package
Operates from 1.8V to 5.5V
120 Ohms (typ) Output Resistance
99% Voltage Conversion Efficiency
Only 3 External Capacitors Required
Power-Saving Shutdown Mode
Low Active Supply Current
-95
μA (typ) for TC2682
- 225
μA (typ) for TC2683
- 700
μA (typ) for TC2684
Applications
LCD Panel Bias
Cellular Phones PA Bias
Pagers
PDAs, Portable Data Loggers
Battery-Powered Devices
Device Selection Table
Package Type
General Description
The TC2682/TC2683/TC2684 are CMOS charge pump
converters that provide an inverted doubled output
from a single positive supply. An on-board oscillator
provides the clock and only three external capacitors
are required for full circuit implementation. Switching
frequencies are 12kHz for the TC2682, 35kHz for the
TC2683, and 125kHz for the TC2684.
Low output source impedance (typically 120
Ω),
provides output current up to 10mA. The TC2682/
TC2683/TC2684 feature a 1.8V to 5.5V operating
voltage range and high efficiency, which make them an
ideal choice for a wide variety of applications requiring
a negative doubled voltage derived from a single
positive supply (for example: generation of -7.2V from
a +3.6V lithium cell or -10V generated from a +5V logic
supply).
The minimum external part count and small physical
size make this family of products useful for a wide
variety of negative bias power supply applications.
Functional Block Diagram
Part
Number
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC2682EUA
8-Pin MSOP
12
-40°C to +85°C
TC2683EUA
8-Pin MSOP
35
-40°C to +85°C
TC2684EUA
8-Pin MSOP
125
-40°C to +85°C
1
2
3
4
8
7
6
5
TC2682
TC2683
TC2684
VOUT
NC
VIN
C2–
GND
C1–
C1+
C2+
8-Pin MSOP
C1+
C2+
VIN
C1–
C2
C2–
C1
TC2682
TC2683
TC2684
VOUT
+
– C
OUT
Input
GND
C1 must have a voltage rating
≥ VIN
C2 and COUT must have a voltage rating ≥ 2VIN
VOUT = -(2 x VIN)
Inverting Charge Pump Voltage Doublers
Obsolete Device
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