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TC828A データシート(PDF) 1 Page - TelCom Semiconductor, Inc

部品番号 TC828A
部品情報  Switched Capacitor Voltage Converter
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メーカー  TELCOM [TelCom Semiconductor, Inc]
ホームページ  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC828A データシート(HTML) 1 Page - TelCom Semiconductor, Inc

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TC828A-1
5/1/00 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
TC828A
Switched Capacitor Voltage Converter
FEATURES
s
Charge Pump in 5-Pin SOT-23A Package
s
>95% Voltage Conversion Efficiency
s
Voltage Inversion and/or Doubling
s
Low 38
µA Quiescent Current
s
Operates from +1.8V to +5.5V
s
Up to 25mA Output Current
s
Only Two External Capacitors Required
s
Lower Power Version of TCM828
APPLICATIONS
s
LCD Panel Bias
s
Cellular Phones
s
Pagers
s
PDAs, Portable Dataloggers
s
Battery-Powered Devices
GENERAL DESCRIPTION
The TC828A is a CMOS “charge-pump” voltage con-
verter in an ultra-small 5-Pin SOT-23A package. It can invert
and/or double an input voltage that can range from +1.8V to
+5.5V. Conversion efficiency is typically >95%, and switch-
ing frequency is 12KHz.
The external component requirement is only two ca-
pacitors (10
µF nominal) for standard voltage inverter appli-
cations.
With a few additional components a positive
doubler can also be built.
All other circuitry, including
control, oscillator, power MOSFETs are integrated on-chip.
Supply current is 38
µA typically.
The TC828A is available in a 5-Pin SOT-23A surface
mount package.
TYPICAL OPERATING CIRCUIT
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC828AECT
5-Pin SOT-23A
– 40
°C to +85°C
NOTE: 5-Pin SOT-23A is equivalent to EIAJ-SC74A.
PIN CONFIGURATION
5-Pin SOT-23A
NOTE: *5-Pin SOT-23A is equivalent to EIAJ SC-74A
Voltage Inverter
TC828A
VIN
V
OUTPUT
C+
C
C1
C2
INPUT
GND
OUT
C+
C–
OUT
TC828ECT
1
2
3
5
GND
VIN
4


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