R&E International
A Subsidiary of Microchip Technology Inc.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver
Product Specification
© 2009 Microchip Technology Inc.
DS22159B-page 1
General Description
The RE46C117 is intended for use in 3V or 4.5V
battery or battery-backed applications. The circuit
features a DC-to-DC up-converter and driver circuit
suitable for driving a piezoelectric horn
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Features
• Low Quiescent Current
• 10V Up Converter
• Low Horn Driver Ron
• Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
1
2
3
4
FEED
VDD
LX
VSS
HRNEN
HORNS
HORNB
VO
8
7
6
5
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL VALUE UNITS
Supply Voltage
V
DD
V
OUT
5
12
V
V
Input Voltage Range Except FEED
V
in
-.3 to V
dd
+.3 V
FEED Input Voltage Range
V
infd
-10 to +22
V
Input Current except FEED
I
in
10
mA
Operating Temperature
T
A
0 to 50
°C
Storage Temperature
T
STG
-55 to 125
°C
Continuous Operating Current
(HornS, HornB, VO)
I
O
40
mA
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 charge
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 2
Electrical Characteristics
Limits apply at Vdd=3V, Vss=0V, Cvo=10uF, T
A
=0
°C to 50°C, unless otherwise noted.
Typical values are at T
A
=27
°C.
Limits
Parameter Symbol
Test
Conditions
Min
Typ
Max
Units
Supply Voltage
Vdd
Operating
2.0 — 5.0
V
Standby Supply
Current
Iddstby
HRNEN low; No loads; DC-DC
Running
— 14 —
uA
Quiescent Supply
Current
Iddq
HRNEN low; No loads;
VO=5V; Vlx=0.5V
— 7
10.5
uA
Quiescent Ivo
Ivoq
Same conditions as above for Iddq
— 4
7.5
uA
Iin
HRNEN Input, Vin=VDD or VSS
-100
—
100
nA
Iihf FEED=+22V;
VO=10V
— 20 50 uA
Input Leakage
Iilf FEED=-10V;
VO=10V
-50 -15 — uA
Input Voltage Low
Vil
HRNEN Input
—
—
1
V
Input Voltage High
Vih
HRNEN Input
2.3
—
—
V
Output Low Voltage
Vol1
HORNB or HORNS; Iout=16mA;
Vdd=3V
— .3 .5
V
Output High
Voltage
Voh1
HORNB or HORNS; VO=10V;
Iout=-16mA; Vdd=HRNEN=3V
9.5 9.7 — V
Vvo1 Vdd=3V;
HRNEN=3V:
Iout=10mA 8.5 10 11
V
VO Output Voltage
Vvo2
Vdd=3V; HRNEN=0V; Iout=10mA 3.5 4 4.4
V
Voeff1
Iload= 10mA, Vdd=3V; HRNEN=0V
—
85
—
%
VO Efficiency
Voeff2
Iload=100uA; Vdd=3V; HRNEN=0V
—
75
—
%
Brownout
Threshold
Vobvt
Falling edge of VO
3.2
3.6
4.0
V
Notes on Electrical Characteristics:
1. DC-DC converter in high boost mode (normal VO=10V) can draw current pulses of greater than 1 Amp and is therefore very
sensitive to series resistance. Critical components of this resistance are the inductor DC resistance, the internal resistance of the
battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin and from the Vss2 pin
to the battery. In order to function properly under full load at Vdd=2V, the total of the inductor and the interconnect resistances
should not exceed 0.3 ohm. The internal battery resistance should be no more than 0.5 ohm and a low ESR capacitor of 10uF or
more should be connected in parallel with the battery to average current over the boost converter cycle.
2. In the Electrical Characteristics Table, wherever a specific VO value is listed under test conditions, the VO is forced externally
with the inductor disconnected and the DC-DC converter is not running.
3. The brown-out threshold voltage is the VO voltage at which the horn will be disabled.
4. The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee
compliance at temperature extremes.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 3
Functional Block Diagram
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 4
Typical Application Circuit
Notes:
1/ Schottky diode D1 must have maximum peak current rating of at least 1.5A and for best results should have
forward voltage spec of less than 0.5V at 1 Amp.
2/ Inductor L3 must have maximum peak current rating of at least 1.5A and for best results should have DC
resistance of less than 0.5 ohm.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 5
Notes
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 6
Trademarks
Information contained in this publication regarding device
applications and the like is provided only for your convenience and
may be superseded by updates. It is your responsibility to ensure
that your application meets with your specifications. MICROCHIP
MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY
KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL,
STATUTORY OR OTHERWISE, RELATED TO THE
INFORMATION, INCLUDING BUT NOT LIMITED TO ITS
CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY
OR FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip devices in
life support and/or safety applications is entirely at the buyer’s risk,
and the buyer agrees to defend, indemnify and hold harmless
Microchip from any and all damages, claims, suits, or expenses
resulting from such use. No licenses are conveyed, implicitly or
otherwise, under any Microchip intellectual property rights.
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EE
L
OQ
, K
EE
L
OQ
logo,
MPLAB, PIC, PICmicro,
PICSTART, rfPIC, SmartShunt and UNI/O are registered
trademarks of Microchip Technology Incorporated in the U.S.A.
and other countries.
FilterLab, Hampshire, Linear Active Thermistor, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial Programming,
ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo,
MPLIB, MPLINK, mTouch, nanoWatt XLP, PICkit, PICDEM,
PICDEM.net, PICtail, PIC
32
logo, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total
Endurance, TSHARC, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2009, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California and
India. The Company’s quality system processes and procedures are for its
PIC
®
MCUs and dsPIC
®
DSCs, K
EE
L
OQ
®
code hopping devices, Serial
EEPROMs, microperipherals, nonvolatile memory and analog products. In
addition, Microchip’s quality system for the design and manufacture of
development systems is ISO 9001:2000 certified.
R&E International
A Subsidiary of Microchip Technology Inc.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver
Product Specification
© 2009 Microchip Technology Inc.
DS22159B-page 1
General Description
The RE46C117 is intended for use in 3V or 4.5V
battery or battery-backed applications. The circuit
features a DC-to-DC up-converter and driver circuit
suitable for driving a piezoelectric horn
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Features
• Low Quiescent Current
• 10V Up Converter
• Low Horn Driver Ron
• Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
1
2
3
4
FEED
VDD
LX
VSS
HRNEN
HORNS
HORNB
VO
8
7
6
5
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL VALUE UNITS
Supply Voltage
V
DD
V
OUT
5
12
V
V
Input Voltage Range Except FEED
V
in
-.3 to V
dd
+.3 V
FEED Input Voltage Range
V
infd
-10 to +22
V
Input Current except FEED
I
in
10
mA
Operating Temperature
T
A
0 to 50
°C
Storage Temperature
T
STG
-55 to 125
°C
Continuous Operating Current
(HornS, HornB, VO)
I
O
40
mA
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 charge
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 2
Electrical Characteristics
Limits apply at Vdd=3V, Vss=0V, Cvo=10uF, T
A
=0
°C to 50°C, unless otherwise noted.
Typical values are at T
A
=27
°C.
Limits
Parameter Symbol
Test
Conditions
Min
Typ
Max
Units
Supply Voltage
Vdd
Operating
2.0 — 5.0
V
Standby Supply
Current
Iddstby
HRNEN low; No loads; DC-DC
Running
— 14 —
uA
Quiescent Supply
Current
Iddq
HRNEN low; No loads;
VO=5V; Vlx=0.5V
— 7
10.5
uA
Quiescent Ivo
Ivoq
Same conditions as above for Iddq
— 4
7.5
uA
Iin
HRNEN Input, Vin=VDD or VSS
-100
—
100
nA
Iihf FEED=+22V;
VO=10V
— 20 50 uA
Input Leakage
Iilf FEED=-10V;
VO=10V
-50 -15 — uA
Input Voltage Low
Vil
HRNEN Input
—
—
1
V
Input Voltage High
Vih
HRNEN Input
2.3
—
—
V
Output Low Voltage
Vol1
HORNB or HORNS; Iout=16mA;
Vdd=3V
— .3 .5
V
Output High
Voltage
Voh1
HORNB or HORNS; VO=10V;
Iout=-16mA; Vdd=HRNEN=3V
9.5 9.7 — V
Vvo1 Vdd=3V;
HRNEN=3V:
Iout=10mA 8.5 10 11
V
VO Output Voltage
Vvo2
Vdd=3V; HRNEN=0V; Iout=10mA 3.5 4 4.4
V
Voeff1
Iload= 10mA, Vdd=3V; HRNEN=0V
—
85
—
%
VO Efficiency
Voeff2
Iload=100uA; Vdd=3V; HRNEN=0V
—
75
—
%
Brownout
Threshold
Vobvt
Falling edge of VO
3.2
3.6
4.0
V
Notes on Electrical Characteristics:
1. DC-DC converter in high boost mode (normal VO=10V) can draw current pulses of greater than 1 Amp and is therefore very
sensitive to series resistance. Critical components of this resistance are the inductor DC resistance, the internal resistance of the
battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin and from the Vss2 pin
to the battery. In order to function properly under full load at Vdd=2V, the total of the inductor and the interconnect resistances
should not exceed 0.3 ohm. The internal battery resistance should be no more than 0.5 ohm and a low ESR capacitor of 10uF or
more should be connected in parallel with the battery to average current over the boost converter cycle.
2. In the Electrical Characteristics Table, wherever a specific VO value is listed under test conditions, the VO is forced externally
with the inductor disconnected and the DC-DC converter is not running.
3. The brown-out threshold voltage is the VO voltage at which the horn will be disabled.
4. The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee
compliance at temperature extremes.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 3
Functional Block Diagram
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 4
Typical Application Circuit
Notes:
1/ Schottky diode D1 must have maximum peak current rating of at least 1.5A and for best results should have
forward voltage spec of less than 0.5V at 1 Amp.
2/ Inductor L3 must have maximum peak current rating of at least 1.5A and for best results should have DC
resistance of less than 0.5 ohm.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 5
Notes
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 6
Trademarks
Information contained in this publication regarding device
applications and the like is provided only for your convenience and
may be superseded by updates. It is your responsibility to ensure
that your application meets with your specifications. MICROCHIP
MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY
KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL,
STATUTORY OR OTHERWISE, RELATED TO THE
INFORMATION, INCLUDING BUT NOT LIMITED TO ITS
CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY
OR FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip devices in
life support and/or safety applications is entirely at the buyer’s risk,
and the buyer agrees to defend, indemnify and hold harmless
Microchip from any and all damages, claims, suits, or expenses
resulting from such use. No licenses are conveyed, implicitly or
otherwise, under any Microchip intellectual property rights.
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EE
L
OQ
, K
EE
L
OQ
logo,
MPLAB, PIC, PICmicro,
PICSTART, rfPIC, SmartShunt and UNI/O are registered
trademarks of Microchip Technology Incorporated in the U.S.A.
and other countries.
FilterLab, Hampshire, Linear Active Thermistor, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial Programming,
ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo,
MPLIB, MPLINK, mTouch, nanoWatt XLP, PICkit, PICDEM,
PICDEM.net, PICtail, PIC
32
logo, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total
Endurance, TSHARC, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2009, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California and
India. The Company’s quality system processes and procedures are for its
PIC
®
MCUs and dsPIC
®
DSCs, K
EE
L
OQ
®
code hopping devices, Serial
EEPROMs, microperipherals, nonvolatile memory and analog products. In
addition, Microchip’s quality system for the design and manufacture of
development systems is ISO 9001:2000 certified.
R&E International
A Subsidiary of Microchip Technology Inc.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver
Product Specification
© 2009 Microchip Technology Inc.
DS22159B-page 1
General Description
The RE46C117 is intended for use in 3V or 4.5V
battery or battery-backed applications. The circuit
features a DC-to-DC up-converter and driver circuit
suitable for driving a piezoelectric horn
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Features
• Low Quiescent Current
• 10V Up Converter
• Low Horn Driver Ron
• Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
1
2
3
4
FEED
VDD
LX
VSS
HRNEN
HORNS
HORNB
VO
8
7
6
5
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL VALUE UNITS
Supply Voltage
V
DD
V
OUT
5
12
V
V
Input Voltage Range Except FEED
V
in
-.3 to V
dd
+.3 V
FEED Input Voltage Range
V
infd
-10 to +22
V
Input Current except FEED
I
in
10
mA
Operating Temperature
T
A
0 to 50
°C
Storage Temperature
T
STG
-55 to 125
°C
Continuous Operating Current
(HornS, HornB, VO)
I
O
40
mA
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 charge
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 2
Electrical Characteristics
Limits apply at Vdd=3V, Vss=0V, Cvo=10uF, T
A
=0
°C to 50°C, unless otherwise noted.
Typical values are at T
A
=27
°C.
Limits
Parameter Symbol
Test
Conditions
Min
Typ
Max
Units
Supply Voltage
Vdd
Operating
2.0 — 5.0
V
Standby Supply
Current
Iddstby
HRNEN low; No loads; DC-DC
Running
— 14 —
uA
Quiescent Supply
Current
Iddq
HRNEN low; No loads;
VO=5V; Vlx=0.5V
— 7
10.5
uA
Quiescent Ivo
Ivoq
Same conditions as above for Iddq
— 4
7.5
uA
Iin
HRNEN Input, Vin=VDD or VSS
-100
—
100
nA
Iihf FEED=+22V;
VO=10V
— 20 50 uA
Input Leakage
Iilf FEED=-10V;
VO=10V
-50 -15 — uA
Input Voltage Low
Vil
HRNEN Input
—
—
1
V
Input Voltage High
Vih
HRNEN Input
2.3
—
—
V
Output Low Voltage
Vol1
HORNB or HORNS; Iout=16mA;
Vdd=3V
— .3 .5
V
Output High
Voltage
Voh1
HORNB or HORNS; VO=10V;
Iout=-16mA; Vdd=HRNEN=3V
9.5 9.7 — V
Vvo1 Vdd=3V;
HRNEN=3V:
Iout=10mA 8.5 10 11
V
VO Output Voltage
Vvo2
Vdd=3V; HRNEN=0V; Iout=10mA 3.5 4 4.4
V
Voeff1
Iload= 10mA, Vdd=3V; HRNEN=0V
—
85
—
%
VO Efficiency
Voeff2
Iload=100uA; Vdd=3V; HRNEN=0V
—
75
—
%
Brownout
Threshold
Vobvt
Falling edge of VO
3.2
3.6
4.0
V
Notes on Electrical Characteristics:
1. DC-DC converter in high boost mode (normal VO=10V) can draw current pulses of greater than 1 Amp and is therefore very
sensitive to series resistance. Critical components of this resistance are the inductor DC resistance, the internal resistance of the
battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin and from the Vss2 pin
to the battery. In order to function properly under full load at Vdd=2V, the total of the inductor and the interconnect resistances
should not exceed 0.3 ohm. The internal battery resistance should be no more than 0.5 ohm and a low ESR capacitor of 10uF or
more should be connected in parallel with the battery to average current over the boost converter cycle.
2. In the Electrical Characteristics Table, wherever a specific VO value is listed under test conditions, the VO is forced externally
with the inductor disconnected and the DC-DC converter is not running.
3. The brown-out threshold voltage is the VO voltage at which the horn will be disabled.
4. The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee
compliance at temperature extremes.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 3
Functional Block Diagram
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 4
Typical Application Circuit
Notes:
1/ Schottky diode D1 must have maximum peak current rating of at least 1.5A and for best results should have
forward voltage spec of less than 0.5V at 1 Amp.
2/ Inductor L3 must have maximum peak current rating of at least 1.5A and for best results should have DC
resistance of less than 0.5 ohm.
RE46C117
DC to DC Converter and Piezoelectric Horn Driver R&E International
Product Specification
A Subsidiary of Microchip Technology
Inc.
© 2009 Microchip Technology Inc.
DS22159B-page 5
Notes