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參數(shù)資料
| 型號： | TC2684EUA |
| 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)： | 5/10頁 |
| 文件大?。?/td> | 220K |
| 代理商： | TC2684EUA |
TC2682/TC2683/TC2684
DS21548C-page 4
2005 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC2682/TC2683/TC2684 inverting charge pumps
perform a -2x multiplication of the voltage applied to the
VIN pin. Conversion is performed using two
synchronous switching matrices and three external
capacitors.
Figure 3-1 is a block diagram representation of the
TC2682/TC2683/TC2684 architecture. The first switch-
ing stage inverts the voltage present at VIN and the
second stage uses the ‘-VIN’ output generated from the
first stage to produce the ‘-2X’ output function from the
second stage switching matrix.
Each device contains an on-board oscillator that
synchronously controls the operation of the charge
pump switching matrices. The TC2682 synchronously
switches
at
12kHz,
the
TC2683
synchronously
switches at 35kHz, and the TC2684 synchronously
switches at 125kHz. The different oscillator frequencies
for this device family allow the user to trade-off
capacitor size versus supply current. Faster oscillators
can use smaller external capacitors, but will consume
more
supply
current
(see
Electrical
Characteristics).
FIGURE 3-1:
TC2682/TC2683/TC2684 ARCHITECTURE
VOUT = -2VIN
-VIN
+
COUT
VIN
Switch Matrix
(1st Stage)
Switch Matrix
(2nd Stage)
Oscillator
C1
+
C2
+
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