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參數(shù)資料
| 型號： | TC1683EUART |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 45.5 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 639K |
| 代理商： | TC1683EUART |
TC1682/3/4-1 8/14/00
TC1682
TC1683
TC1684
2001 Microchip Technology Inc. DS21537A
Inverting Charge Pump Voltage Doublers with Active High Shutdown
TYPICAL OPERATING CIRCUIT
PIN CONFIGURATION
ORDERING INFORMATION
Part No. Package Osc Freq (kHz) Temp. Range
TC1682EUA 8-Pin MSOP 12 – 40
°
C to +85
°
C
TC1683EUA 8-Pin MSOP
TC1684EUA 8-Pin MSOP
35 – 40
°
C to +85
°
C
125 – 40
°
C to +85
°
C
1
2
3
4
5
6
7
8
C1-
C2+
C1+
V
IN
GND
C2-
V
OUT
TC1682
TC1683
SHDN
8-Pin MSOP
C1+
C2+
V
IN
C1–
C2
C2–
C1
TC1682
TC1683
TC1684
V
OUT
+
+
+
–
C
OUT
INPUT
GND
Notes:
1) C1 must have a voltage rating greater
than or equal to V
IN
2) C2 and C
OUT
must have a voltage rating greater
than or equal to 2V
IN
V
OUT
= -(2xV )
SHDN
OFF
ON
GENERAL DESCRIPTION
The TC1682, TC1683 and TC1684 are CMOS charge
pump converters that provide an inverted doubled output
from a single positive supply. An on-board oscillator pro-
vides the clock and only three external capacitors are
required for full circuit implementation. Switching frequen-
cies are 12kHz for the TC1682, 35kHz for the TC1683, and
125kHz for the TC1684. When the SHDN pin is held at a
logic high, the device goes into a very low power mode of
operation consuming less than 1
μ
A (typ.) of supply current.
Low output source impedance (typically 120
), pro-
vides output current up to 10mA. The TC1682, TC1683 and
TC1684 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: genera-
tion 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 products useful for a wide variety of negative bias power
supply applications.
FEATURES
I
Small 8-Pin MSOP Package
I
Operation from 1.8V to 5.5V
I
120 Ohms (typ.) Output Resistance
I
99% Voltage Conversion Efficiency
I
Only 3 External Capacitors Required
I
Power-Saving Shutdown Mode
I
Low Active Supply Current
.......................... 95
μ
A (typ.) for TC1682
..........................225
μ
A (typ.) for TC1683
......................... 700
μ
A (typ.) for TC1684
I
Fully Compatible with 1.8V Logic Systems
TYPICAL APPLICATIONS
I
LCD Panel Bias
I
Cellular Phones PA Bias
I
Pagers
I
PDAs, Portable Data Loggers
I
Battery Powered Devices
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