RE46C109 MICROCHIP | Alldatasheet

Document overview

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Technical content

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 VDD 12 V Input Voltage Range Except FEED, IO1, IO2 Vin -.3 to Vdd +.3 V FEED Input Voltage Range Vinfd -10 to +22 V IO2 Input Voltage Range Vio2 -.3 to VREG+.3 V IO1 (as input) Voltage Range Vio1 -.3 to Vdd + 6 V Input Current except FEED Iin 10 mA Operating Temperature TA -40 to 85 °C Continuous Operating Current (Horn or VPOS) Icon 50 mA Storage Temperature TSTG -55 to 125 °C Maximum Junction Temperature TJ 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 wi th static protection; however proper ESD prevention procedures should be used when handling this product. Damage can occur when expos ed to extremely high static electrical charges.

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification © 2009 Microchip Technology Inc. DS22168A-page 2 Electrical Characteristics at TA=27°C, Vdd=9V, Vss=0V (unless otherwise noted). Limits Parameter Symbol Conditions MIN TYP MAX UNITS Supply Voltage Vdd Operating 6 12 V Quiescent Supply Current Idd1 HRNEN, LBST, IODIR, FEED, REGSEL=VSS, No Loads 4.7 6.5 uA Supply Current Idd2 LBST, IODIR, FEED =VSS HRNEN=VDD, No Loads 350 uA Iin All Inputs except FEED, Vin=VDD or VSS -100 100 nA Iihf FEED=+22V 20 50 uA Input Leakage Iilf FEED=-10V -50 -15 uA Output Leakage Iout PG = 5.0v 1.0 uA Input Voltage Low Vil All Inputs except FEED 1 V Input Voltage High Vih All Inputs Except FEED 2.3 V Vol1 HORNB or HORNS; Iout=16mA; .3 .5 V Vol2 IO2, Iout=100uA; IODIR=Vil , IO1=Vil .3 .5 V Output Low Voltage Vol3 PG, Iout=5.0mA; .5 V Voh1 HORNB or HORNS; Iout=-16mA Vpos-.5 Vpos-.3 V Output High Voltage Voh2 IO2, Iout=-100uA; IODIR=Vil , IO1=Vih Vreg -.5 Vreg -.3 V VPOS RMS Output Voltage Vvpos VPOS; Iout=-16mA; HRNEN=VDD 10.7 11.8 12.7 V Charge pump Oscillator Frequncy CPf 150 kHz Charge pump Power Efficiency CPpe VPOS; Iout=-16mA, C1=1uF C2=10uF; Vdd=6.5v 85 % Charge pump Voltage Efficiency CPve VPOS; No Loads, C1=1uF C2=10uF; Vdd=6.0v 95 99 % Low Battery Interface Lbv LBAT; LBST=Vdd .17 *Vdd .2*Vdd .23*Vdd V VREG Voltage Vreg VREG; Iout<50mA; HRNEN=VSS 2.85 3 3.15 V VREG Line Regulation Vregln VREG; Vdd=6V to 12V; VREG Iout=10mA; HRNEN = VSS; Note 3 50 mV VREG Load Regulation Vregld VREG; Iout=0 to -50mA; HRNEN=VSS; Note 3 90 mV Brownout Threshold Vbvt Falling Edge of VDD; Note 1 4.5 5.0 5.5 V Brownout Pull Down Current Ibt Vdd=4.5V, Vreg=2v 15 25 mA

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification © 2009 Microchip Technology Inc. DS22168A-page 3 Electrical Characteristics at TA=27°C, Vdd=9V, Vss=0V (unless otherwise noted). Limits Parameter Symbol Conditions MIN TYP MAX UNITS VREG Over Voltage Clamp Vcl Iout>1mA; Note 2 3.7 4.0 4.3 V VREG Over Voltage Clamp Current Icl VREG ≥Vcl 0.5 mA PGvtr Vreg output rising 77 84 94 %Vreg PG Trip Threshold PGvtf Vreg output falling 72 80 88 %Vreg PG Delay PGtdly Delay time with respect to PGvtr 500 usec IO1ih1 IODIR=Vil, IO1=Vdd-2V, Vdd=12V 25 60 UA IO1ih2 IODIR=Vil, IO1=17V, Vdd=12V 150 UA IO1ioh1 IODIR, IO2=Vih, Vdd=6.5V, IO1=4.5V -4 mA IO1ioh2 IODIR, IO2=Vih, Vdd=12V, IO1=Vss -16 mA IO1 Output Current IO1iol1 IO dump current IODIR= Vih, IO2=Vil, IO1=1V 10 15 mA IO1vih IODIR=Vil 3 V IO1 Alarm Voltage IO1vil IODIR=Vil 1.5 V 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 IO2 (pin 4) IO1 (pin 2) IODIR (pin 3) Input Output Input Output 1 0 0 1 1 1 0 0 0 0 1 1

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification Functional Block Diagram © 2009 Microchip Technology Inc. DS22168A-page 4

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification © 2009 Microchip Technology Inc. DS22168A-page 5 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.

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification © 2009 Microchip Technology Inc. DS22168A-page 6 Device Operation (Please refer to the functional block diagram) The RE46C109 consists of the following main functional blocks: band gap voltage reference, low drop-out voltage regulator (with over voltage clamp and power supply brownout protection), low battery detection, switched capacitor 12 volt boost regulator, horn driver and Interconnect logic. When power is applied the band gap voltage reference and the voltage regulator output are initially enabled. The low battery detection, horn driver outputs and switched capacitor 12v boost regulator are enabled by TTL compatible positive logic control inputs. When the HRNEN (Horn Enable) input is brought to a logic high level, the hor n driver outputs as well as the 12v boost regulator become active. The 12v boost regulator su pplies the horn driver outputs. The 12v boost regulator utilizes a charge pump to boost the Vdd supply input to a regulated 12-v olt output. The charge pump consists of an internal oscillator that is controlled in a voltage comparator feedback configuration. The low battery detection is enabled and strobed when the LBST input is brought to a logic high level. The LBAT output is a voltage follower amplifier whose input is determined by a resistor divider across the device supply rails.

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification Typical Application Circuit Application Notes: (See application circuit) The efficiency of the switched capacitor charge pump regulator varies with the applied input voltage and the load current. The approximate voltage efficiency is given by: Efficiency (%) = [VPOS/(2xVDD)]x100 © 2009 Microchip Technology Inc. DS22168A-page 7

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification © 2009 Microchip Technology Inc. DS22168A-page 8 Application Notes continued: (See application circuit) Capacitor Selection: To achieve minimum output voltage ripple, the output capacitor C4 (for VPOS) should have a low ESR (Effective Series Resistance) value with leads kept as short as possible. Capacitors with long leads increase ripple voltage due to lead inductance. Like all Low-Dropout Regulators, the RE46C109 requires an output capacitor connected between VREG (output) and VSS to stabilize the internal control loop. The recommended capacitance is 10uF. Capacitor values larger than 10uF are acceptable. PCB Layout Suggestions: Due to large transient currents flow in the VDD, VPOS and VSS terminals, minimizing both input and output ripple is accomplished by placing capacitors as close as possible to the regulator using short direct circuit wiring or traces.

Voltage Regulator, Voltage Converter and R&E International Piezoelectric Horn Driver A Subsidiary of Microchip Technology Inc. Product Specification 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. Trademarks The Microchip name and logo, t he Microchip logo, Accuron, dsPIC, K EELOQ, K EELOQ 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 Acti ve 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, App lication 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 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 Micr ochip 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 EELOQ ® code hopping devices, Serial EEPROMs, microperipherals, nonvolat ile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. © 2009 Microchip Technology Inc. DS22168A-page 9