R&E International
A Subsidiary of Microchip Technology Inc.
RE46C109
Voltage Regulator, Voltage Converter and Piezoelectric Horn Driver
Product Specification
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.
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
VDD
1
16
VPOS
CAP+
CAP-
VREG
LBAT
HORNB
HORNS
FEED
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Games
Hand Held Instruments
IO1
IODIR
IO2
LBST
PG
HRNEN
VSS
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Input Voltage Range Except FEED, IO1, IO2
FEED Input Voltage Range
IO2 Input Voltage Range
IO1 (as input) Voltage Range
Input Current except FEED
Operating Temperature
Continuous Operating Current (Horn or VPOS)
Storage Temperature
Maximum Junction Temperature
SYMBOL
V
DD
V
in
V
infd
V
io2
V
io1
I
in
T
A
I
con
T
STG
T
J
VALUE
12
-.3 to V
dd
+.3
-10 to +22
-.3 to VREG+.3
-.3 to V
dd
+ 6
10
-40 to 85
50
-55 to 125
125
UNITS
V
V
V
V
V
mA
°C
mA
°C
°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.
© 2009 Microchip Technology Inc.
DS22168A-page 1
RE46C109
Voltage Regulator, Voltage Converter and
Piezoelectric Horn Driver
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
Electrical Characteristics at T
A
=27
°
C, Vdd=9V, Vss=0V (unless otherwise noted).
Parameter
Supply Voltage
Quiescent Supply
Current
Supply Current
Symbol
Vdd
Idd1
Idd2
Iin
Operating
Conditions
HRNEN, LBST, IODIR, FEED,
REGSEL=VSS, No Loads
LBST, IODIR, FEED =VSS
HRNEN=VDD, No Loads
All Inputs except FEED, Vin=VDD
or VSS
FEED=+22V
FEED=-10V
PG = 5.0v
All Inputs except FEED
Limits
MIN
6
4.7
350
-100
20
-50
-15
1.0
1
100
50
TYP
MAX
12
6.5
UNITS
V
uA
uA
nA
uA
uA
uA
V
Input Leakage
Iihf
Iilf
Output Leakage
Input Voltage Low
Iout
Vil
Input Voltage
High
Output Low Voltage
Vih
Vol1
Vol2
Vol3
All Inputs Except FEED
HORNB or HORNS; Iout=16mA;
IO2, Iout=100uA;
IODIR=Vil , IO1=Vil
PG, Iout=5.0mA;
HORNB or HORNS; Iout=-16mA
IO2, Iout=-100uA;
IODIR=Vil , IO1=Vih
VPOS; Iout=-16mA;
HRNEN=VDD
VPOS; Iout=-16mA, C1=1uF
C2=10uF; Vdd=6.5v
VPOS; No Loads, C1=1uF
C2=10uF; Vdd=6.0v
LBAT; LBST=Vdd
VREG; Iout<50mA; HRNEN=VSS
VREG; Vdd=6V to 12V; VREG
Iout=10mA; HRNEN = VSS
; Note 3
VREG; Iout=0 to -50mA;
HRNEN=VSS;
Note 3
Falling Edge of VDD;
Note 1
Vdd=4.5V, Vreg=2v
2.3
.3
.3
.5
Vpos-.5
Vreg -.5
10.7
Vpos-.3
Vreg -.3
11.8
150
85
95
.17 *Vdd
V
.5
.5
V
V
V
V
V
12.7
V
kHz
%
%
.23*Vdd
Output High
Voltage
VPOS RMS Output
Voltage
Charge pump
Oscillator Frequncy
Charge pump
Power Efficiency
Charge pump
Voltage Efficiency
Low Battery
Interface
VREG Voltage
VREG Line
Regulation
VREG Load
Regulation
Brownout
Threshold
Brownout Pull
Down Current
Voh1
Voh2
V
vpos
CPf
CPpe
CPve
Lbv
Vreg
Vregln
Vregld
Vbvt
Ibt
99
.2*Vdd
V
V
mV
mV
V
mA
2.85
3
3.15
50
90
4.5
15
5.0
25
5.5
© 2009 Microchip Technology Inc.
DS22168A-page 2
RE46C109
Voltage Regulator, Voltage Converter and
Piezoelectric Horn Driver
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
Electrical Characteristics at T
A
=27
°
C, Vdd=9V, Vss=0V (unless otherwise noted).
Parameter
VREG Over
Voltage Clamp
VREG Over
Voltage
Clamp Current
PG Trip Threshold
PG Delay
Symbol
Vcl
Icl
PGvtr
PGvtf
PGtdly
IO1ih1
IO1ih2
Conditions
Iout>1mA; Note 2
VREG≥Vcl
Vreg output rising
Vreg output falling
Delay time with respect to PGvtr
IODIR=Vil, IO1=Vdd-2V, Vdd=12V
IODIR=Vil, IO1=17V, Vdd=12V
IODIR, IO2=Vih, Vdd=6.5V,
IO1=4.5V
IODIR, IO2=Vih, Vdd=12V,
IO1=Vss
IO dump current
IODIR= Vih, IO2=Vil, IO1=1V
IODIR=Vil
IODIR=Vil
Limits
MIN
3.7
0.5
77
72
25
84
80
500
60
150
-4
-16
10
3
1.5
15
94
88
TYP
4.0
MAX
4.3
UNITS
V
mA
%Vreg
%Vreg
usec
UA
UA
mA
mA
mA
V
V
IO1 Output Current
IO1ioh1
IO1ioh2
IO1iol1
IO1 Alarm Voltage
IO1vih
IO1vil
Unless noted the limits at room temperature are guaranteed and 100% production tested. Limits over temperature are guaranteed but not
100% tested.
Note 1: The brown-out threshold voltage is the Vdd voltage at which the regulator will be disabled and VREG (output) will be pulled to Vss.
Note 2: In normal operation, the regulator will provide high-side current of up to 50mA, but current sinking capability is typically under 1uA. The
overvoltage clamp, Vcl is intended to limit the voltage at VREG (output) when it is pulled up by an external source.
Note 3: Not 100% production tested but limits are guaranteed by design.
Interconnect Logic Truth Table
IODIR
(pin 3)
1
1
0
0
IO2 (pin 4)
Input
Output
0
1
0
1
IO1 (pin 2)
Input
Output
0
1
0
1
© 2009 Microchip Technology Inc.
DS22168A-page 3
RE46C109
Voltage Regulator, Voltage Converter and
Piezoelectric Horn Driver
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
Functional Block Diagram
© 2009 Microchip Technology Inc.
DS22168A-page 4
RE46C109
Voltage Regulator, Voltage Converter and
Piezoelectric Horn Driver
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
PIN DESCRIPTIONS
VDD
(Pin 1, Input) - Connect to the positive
terminal of the supply voltage for the voltage
regulator, charge pump voltage converter
and bi-directional Interconnect block.
IO1
(Pin 2, Input/Output) - This bi-directional
pin provides an interface to additional
RE46C109 IO1 pins. This serves as a
communication link between separate
modules.
IODIR
(Pin 3, Input) - This input provides
control for the bi-directional pins IO1 and
IO2.
IO2
(Pin 4, Input/Output) - This bi-directional
pin provides an interface to a TTL/CMOS I/O
of a
uP
or ASIC. Refer to the interconnect
logic truth table.
LBST
(Pin 5, Input) - This input provides an
enable or strobe control for the analog low
battery detection function.
PG
(Pin 6, Output) - This open drain NMOS
output provides a status indication of when
the VREG output is above or below a
specified voltage level.
HRNEN
(Pin 7, Input) - This input provides
activation control for the charge pump boost
regulator and horn driver outputs.
VSS
(Pin 8, Input) - This power pin is
connected to the negative terminal of the
supply voltage.
FEEDBACK
(Pin9, Input) - Horn driver
input.
HORNS
(Pin10, Output) - Horn output driver
which provides VPOS to VSS output voltage
swing for the piezoelectric horn.
HORNB
(Pin11, Output) - Horn output driver
which provides VPOS to VSS output voltage
swing for the piezoelectric horn.
LBAT
(Pin12, Output) - Analog output
voltage that is proportional to the VDD
supply and functions as a low battery
detection output.
VREG
(Pin13, Output) - Voltage regulator
output, requires an external capacitor.
VCAP-
(Pin14, I/O) - Negative terminal for
the external charge pump boost (fly)
capacitor.
VCAP+
(Pin 15, I/O) - Positive terminal for
the external charge pump boost (fly)
capacitor.
VPOS
(Pin 16, Output) - This output pin
requires an external filter capacitor which
supplies voltage for the horn driver outputs.
© 2009 Microchip Technology Inc.
DS22168A-page 5
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