R&E International

A Subsidiary of Microchip Technology Inc.

RE46C109

Voltage Regulator, Voltage Converter and Piezoelectric Horn Driver

Product Specification

© 2009 Microchip Technology Inc.

DS22168A-page 1

General Description

The RE46C109 is intended for use in applications

where low voltage regulation and a high voltage

horn driver are required. The circuit features a

voltage boost converter/regulator and driver circuit

suitable for driving a piezoelectric horn. The horn

enable pin activates the boost converter and horn

driver circuit. Supply current is 6.5uA maximum

when the boost regulator and horn driver are not in

use. A 3V regulator is also provided for

microprocessor voltage regulation. Low battery

detection and signaling are also available.

Interconnect pins are provided to allow

communication in multiple unit environments. A

power good pin monitors the status of the regulator

output.

Applications

Smoke detectors

CO Detectors

Personal Security Products

Electronic Games

Hand Held Instruments

Features

•

Low Quiescent Current

•

12V Boost Regulator

•

Low Horn Driver Ron

•

3V Regulator, Other Options Available

•

Low Battery Detection Interface

•

Power Good and Brownout Circuits

•

Device interconnection

•

Available in DIP and SOIC packages

•

Available in Standard Packaging or RoHS

Compliant Pb Free Packaging

Pin Configuration

1

16

VDD

IO1

IODIR

IO2

LBST

PG

HRNEN

VSS

VPOS

CAP+

CAP-

VREG

LBAT

HORNB

HORNS

FEED

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

VALUE

UNITS

Supply Voltage

12

V

Input Voltage Range Except FEED, IO1, IO2

V

FEED Input Voltage Range

-10 to +22

V

IO2 Input Voltage Range

-.3 to VREG+.3

V

IO1 (as input) Voltage Range

V

Input Current except FEED

10

mA

Operating Temperature

-40 to 85

°C

Continuous Operating Current (Horn or VPOS)

50

mA

Storage Temperature

-55 to 125

°C

Maximum Junction Temperature

125

°C

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are

stress ratings only and operation at these conditions for extended periods may affect device reliability.

This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used

when handling this product. Damage can occur when exposed to extremely high static electrical charges.