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Microchip Technology - Charge Pump DC-TO-DC Voltage Converter

Numéro de référence TC1044S
Description Charge Pump DC-TO-DC Voltage Converter
Fabricant Microchip Technology 
Logo Microchip Technology 





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TC1044S fiche technique
EVALUATION
KIT
AVAILABLE
TC1044S
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 ............ 80µA @ 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.
PIN CONFIGURATION (DIP AND SOIC)
BOOST 1
8 V+
CAP + 2 TC1044SCPA 7 OSC
TC1044SEPA
GND
3
TC1044SIJA 6
TC1044SMJA
LOW
VOLTAGE (LV)
CAP 4
5 VOUT
BOOST 1
8 V+
CAP + 2 TC1044SCOA 7 OSC
GND
3 TC1044SEOA 6
LOW
VOLTAGE (LV)
CAP 4
5 VOUT
FUNCTIONAL BLOCK DIAGRAM
1
BOOST
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC1044SCOA
TC1044SCPA
TC1044SEOA
TC1044SEPA
TC1044SIJA
TC1044SMJA
TC7660EV
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
8-Pin SOIC
– 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
8-Pin CerDIP
– 25°C to +85°C
8-Pin CerDIP
– 55°C to +125°C
Charge Pump Family Evaluation Kit
V + CAP +
82
7
OSC
RC
OSCILLATOR
6
LV
2
INTERNAL
VOLTAGE
REGULATOR
TC1044S
VOLTAGE
LEVEL
TRANSLATOR
3
GND
4 CAP
5 VOUT
LOGIC
NETWORK
© 2001 Microchip Technology Inc. DS21348A
TC1044S-12 9/16/96

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