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TC1240 Datenblatt(Datasheet) 1 Page - TelCom Semiconductor, Inc

Teile-Nr. TC1240
Beschreibung  Positive Doubling Charge Pump with Shutdown in SOT Package
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Hersteller  TELCOM [TelCom Semiconductor, Inc]
Homepage  http://www.telcom-semi.com
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TC1240
Positive Doubling Charge Pump with
Shutdown in SOT Package
TC1240-1 7/7/00
Positive Doubling Charge Pump with Shutdown
in SOT Package
GENERAL DESCRIPTION
The TC1240 is a doubling CMOS charge-pump voltage
converter in a small 6-Pin SOT-23A package. TC1240
doubles an input voltage which can range from +2.5V to
+4.0V. Conversion efficiency is typically >99%. Internal
oscillator frequency is 160kHz for the TC1240. The TC1240
has an active high shutdown which limits the current con-
sumption of the device to less than 1
µA.
External component requirement is only two capacitors
for standard voltage doubler applications. All other circuitry,
including control, oscillator, power MOSFETs are integrated
on-chip. Typical supply current is 180
µA and the device is
available in a 6-Pin SOT-23A surface mount package.
FEATURES
s
Space Saving 6-Pin SOT-23A Package
s
>99% Typical Voltage Conversion Efficiency
s
Voltage Doubling
s
Operates from +2.5V to +4.0V
s
Low Output Resistance (17
Typical)
s
Only Two External Capacitors Required
s
Consumes 180
µA (Typical) in Active Mode
s
Power-Saving Shutdown Mode (1
µA Maximum)
s
Fully Compliant with 1.8V Logic Sytems
APPLICATIONS
s
Cellular Phones
s
Pagers
s
PDAs, Portable Dataloggers
s
Battery-Powered Devices
s
Handheld Instruments
ORDERING INFORMATION
Part
Number
Package
Temp. Range
TC1240ECH
6-Pin SOT-23A
–40
°C to +85°C
TC1240
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
TYPICAL OPERATING CIRCUIT
PIN CONFIGURATION
Positive Voltage Doubler
TC1240
VIN
2 x INPUT
C+
C
C1
C2
INPUT
GND
OUT
SHDN
OFF
ON
6-Pin SOT-23A
C+
C–
GND
TC1240ECH
1
2
3
6
VIN
OUT
4
5
SHDN
NOTE: *6-Pin SOT-23A is equivalent to EIAJ SC-74




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