Microchip TC1044S Handleiding

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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

■Converts +5V Logic Supply to ±5V System

■Wide Input Voltage Range ....................1.5V to 12V

■Ecient Voltage Conversion.........................99.9%

■Excellent Power Eciency...............................98%

■Low Power Consumption............80µA @ V IN= 5V

■Low Cost and Easy to Use

— Only Two External Capacitors Required

■RS-232 Negative Power Supply

■Available in 8-Pin Small Outline (SOIC) and 8-Pin

Plastic DIP Packages

■Improved ESD Protection .....................Up to 10kV

■No External Diode Required for High Voltage

Operation

■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 +

8 2

7

6

OSC

LV

3

LOGIC

NETWORK

VOUT

5

CAP –

4

1

BOOST

ORDERING INFORMATION

Part No.Package Temp. Range

TC1044SCOA8-Pin SOIC0° °C to +70C

TC1044SCPA8-Pin Plastic DIP0° °C to +70C

TC1044SEOA8-Pin SOIC– 40° °C to +85C

TC1044SEPA8-Pin Plastic DIP– 40° °C to +85C

TC1044SIJA8-Pin CerDIP– 25° °C to +85C

TC1044SMJA8-Pin CerDIP– 55° °C to +125C

TC7660EVCharge 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

+

V1

2

3

4

8

7

6

5

TC1044SCOA

TC1044SEOA

BOOST

CAP +

GND

CAP –VOUT

LOW

VOLTAGE (LV)

OSC

+

V

Product specificaties