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TC1044SIJA Datasheet(PDF) 1 Page - Microchip Technology

No. de pieza TC1044SIJA
Descripción Electrónicos  Charge Pump DC-TO-DC Voltage Converter
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1044SIJA Datasheet(HTML) 1 Page - Microchip Technology

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TC1044S
TC1044S-12 9/16/96
EVALUATION
KIT
AVAILABLE
© 2001 Microchip Technology Inc.
DS21348A
Charge Pump DC-TO-DC Voltage Converter
FEATURES
s
Converts +5V Logic Supply to
±5V System
s
Wide Input Voltage Range .................... 1.5V to 12V
s
Efficient Voltage Conversion ......................... 99.9%
s
Excellent Power Efficiency ............................... 98%
s
Low Power Consumption ............ 80
µA @ VIN = 5V
s
Low Cost and Easy to Use
— Only Two External Capacitors Required
s
RS-232 Negative Power Supply
s
Available in 8-Pin Small Outline (SOIC) and 8-Pin
Plastic DIP Packages
s
Improved ESD Protection ..................... Up to 10kV
s
No External Diode Required for High Voltage
Operation
s
Frequency Boost Raises FOSC to 45kHz
GENERAL DESCRIPTION
The TC1044S is a pin-compatible upgrade to the Indus-
try standard TC7660 charge pump voltage converter. It
converts a +1.5V to +12V input to a corresponding –1.5V
to –12V output using only two low cost capacitors, eliminat-
ing inductors and their associated cost, size and EMI.
Added features include an extended supply range to 12V,
and a frequency boost pin for higher operating frequency,
allowing the use of smaller external capacitors.
The on-board oscillator operates at a nominal frequency
of 10kHz. Frequency is increased to 45kHz when pin 1 is
connected to V
+. Operation below 10kHz (for lower supply
current applications) is possible by connecting an external
capacitor from OSC to ground (with pin 1 open).
The TC1044S is available in both 8-pin DIP and
8-pin small outline (SOIC) packages in commercial and
extended temperature ranges.
FUNCTIONAL BLOCK DIAGRAM
TC1044S
GND
INTERNAL
VOLTAGE
REGULATOR
RC
OSCILLATOR
VOLTAGE–
LEVEL
TRANSLATOR
2
V +
CAP +
82
7
6
OSC
LV
3
LOGIC
NETWORK
VOUT
5
CAP –
4
1
BOOST
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC1044SCOA
8-Pin SOIC
0
°C to +70°C
TC1044SCPA
8-Pin Plastic DIP
0
°C to +70°C
TC1044SEOA
8-Pin SOIC
– 40
°C to +85°C
TC1044SEPA
8-Pin Plastic DIP
– 40
°C to +85°C
TC1044SIJA
8-Pin CerDIP
– 25
°C to +85°C
TC1044SMJA
8-Pin CerDIP
– 55
°C to +125°C
TC7660EV
Charge Pump Family Evaluation Kit
PIN CONFIGURATION (DIP AND SOIC)
1
2
3
4
8
7
6
5
TC1044SCPA
TC1044SEPA
TC1044SIJA
TC1044SMJA
BOOST
CAP +
GND
CAP –
VOUT
LOW
VOLTAGE (LV)
OSC
+
V
1
2
3
4
8
7
6
5
TC1044SCOA
TC1044SEOA
BOOST
CAP +
GND
CAP –
VOUT
LOW
VOLTAGE (LV)
OSC
+
V


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