TC1044S Datasheet, PDF (1/8 Pages) TelCom Semiconductor, Inc – CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER

EVALUATION
KIT
AVAILABLE
1
TC1044S
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
2
FEATURES
GENERAL DESCRIPTION
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 @ V_IN = 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 F_OSC to 45kHz
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.
3 ^{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
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extended temperature ranges.
PIN CONFIGURATION (DIP and SOIC)
BOOST 1
8 V+
CAP ⁺ 2
7 OSC
GND
TC1044SCPA
3 _TC1044SEPA 6
LOW
VOLTAGE (LV)
CAP ^–
4
TC1044SIJA
TC1044SMJA
5
VOUT
BOOST 1
8 V+
CAP ⁺ 2
7 OSC
GND
3 ^TC1044SCOA 6
TC1044SEOA
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
V+
CAP ⁺
8
2
8-Pin SOIC
8-Pin Plastic DIP
0°C to +70°C
0°C to +70°C
5
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
6
7
OSC
RC
OSCILLATOR
2
6
LV
INTERNAL
VOLTAGE
REGULATOR
TC1044S
TELCOM SEMICONDUCTOR, INC.
VOLTAGE–
LEVEL
TRANSLATOR
3
GND
4 _{CAP –}
7
5 _VOUT
LOGIC
NETWORK
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TC1044S-12 9/16/96
4-43