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參數(shù)資料
| 型號： | TC3684EUA |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 170 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 229K |
| 代理商： | TC3684EUA |
2005 Microchip Technology Inc.
DS21556C-page 1
TC3682/TC3683/TC3684
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 TC3682
- 225
μA (typ) for TC3683
- 700
μA (typ) for TC3684
Fully Compatible with 1.8V Logic Systems
Applications
LCD Panel Bias
Cellular Phones PA Bias
Pagers
PDAs, Portable Data Loggers
Battery-Powered Devices
Device Selection Table
Package Type
General Description
The TC3682/TC3683/TC3684 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 TC3682, 35kHz for the
TC3683, and 125kHz for the TC3684. When the SHDN
pin is held at a logic low, the device goes into a very low
power mode of operation consuming less than 1
μA
(typ) of supply current.
Low output source impedance (typically 120
Ω), pro-
vides output current up to 10mA. The TC3682/TC3683/
TC3684 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, small physical size
and shutdown mode feature make this family of prod-
ucts useful for a wide variety of negative bias power
supply applications.
Functional Block Diagram
Part
Number
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC3682EUA
8-Pin MSOP
12
-40°C to +85°C
TC3683EUA
8-Pin MSOP
35
-40°C to +85°C
TC3684EUA
8-Pin MSOP
125
-40°C to +85°C
1
2
3
4
8
7
6
5
TC3682
TC3683
TC3684
VOUT
SHDN
VIN
C2–
GND
C1–
C1+
C2+
8-Pin MSOP
C1+
C2+
VIN
C1–
C2
C2–
C1
TC3682
TC3683
TC3684
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)
SHDN
ON
OFF
Inverting Charge Pump Voltage Doublers with Active Low Shutdown
Obsolete Device
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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