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参数资料
| 型号： | TC1684EUA |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 170 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 1/6页 |
| 文件大小： | 634K |
| 代理商： | TC1684EUA |
TC1682/3/4-1 8/14/00
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
TC1682
TC1683
TC1684
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
35
– 40
°C to +85°C
TC1684EUA
8-Pin MSOP
125
– 40
°C to +85°C
1
2
3
4
5
6
7
8
C1-
C1+
C2+
C2-
TC1682
TC1683
TC1684
VIN
VOUT
SHDN
GND
8-Pin MSOP
C1+
C2+
VIN
C1–
C2
C2–
C1
TC1682
VOUT
+
– COUT
INPUT
GND
Notes:
1) C1 must have a voltage rating greater
than or equal to VIN
2) C2 and COUT must have a voltage rating greater
than or equal to 2VIN
VOUT = -(2xV )
IN
TC1683
TC1684
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
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
s Small 8-Pin MSOP Package
s Operation from 1.8V to 5.5V
s 120 Ohms (typ.) Output Resistance
s 99% Voltage Conversion Efficiency
s Required Only 3 External Capacitors
s Power-Saving Shutdown Mode
s Low Active Supply Current
.......................... 95
A (typ.) for TC1682
..........................225
A (typ.) for TC1683
......................... 700
A (typ.) for TC1684
s Fully Compatible with 1.8V Logic Systems
TYPICAL APPLICATIONS
s LCD Panel Bias
s Cellular Phones PA Bias
s Pagers
s PDAs, Portable Data Loggers
s Battery Powered Devices
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