r&e international RE46C119 voltage regulator, voltage converter and piezoelectric horn driver product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 1 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. general description the RE46C119 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 piez oelectric 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 circuit ? 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 v dd 12 v input voltage range except feed, io1, io2 v in -.3 to v dd +.3 v feed input voltage range v infd -10 to +22 v io2 input voltage range v io2 -.3 to vreg+.3 v io1 (as input) voltage range v io1 -.3 to v dd + 6 v input current except feed i in 10 ma operating temperature t a -40 to 85 c continuous operating current (horn or vpos) i con 50 ma storage temperature t stg -55 to 125 c maximum junction temperature t j 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 ex tended periods may affect device reliability. this product utilizes cmos technology with static protecti on; however proper esd preventi on procedures should be used when handling this product. damage can occur when exposed to extremely high static electrical charges.
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 2 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. electrical characteristics at t a =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 v vpos 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 electrical characteristics at t a =27 c, vdd=9v, vss=0v (unless otherwise noted).
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 3 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. 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 b ut not 100% tested. note 2: in normal operation, the regulator will provide high-si de current of up to 50ma, but current sinking capability is typi cally under 1ua. the overvoltage clamp, vcl is intended to limit the voltage at vr eg (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
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 4 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. functional block diagram
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 5 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. 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 RE46C119 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 u p 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.
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 6 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. device operation (please refer to the functional block diagram) the RE46C119 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 horn driver outputs as well as the 12v boost regulator become active. the 12v boost regulator supplies the horn driver outputs. the 12v boost regulator utilizes a charge pump to boost the vdd supply input to a regulated 12-volt 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 determin ed by a resistor divider across the device supply rails.
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 7 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. typical application circuit application notes: (see application circuit) the efficiency of the switched capacitor charge pu mp regulator varies with the applied input voltage and the load current. the approximate voltage efficiency is given by: efficiency (%) = [ vpos / (2xvdd) ] x100
RE46C119 voltage regulator, voltage converter and piezoelectric horn driver r&e international product specification telephone 610.992.0727 facsimile 610.992.0734 e-mail: rand e@randeint.com page 8 of 8 ds-RE46C119-011207 this datasheet contains proprietary and confidential information. application notes cont?d: (see application circuit) capacitor selection: to achieve minimum output voltage ripple, the output capacitor c 4 (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 RE46C119 requir es an output capacitor connected between vreg (output) and vss to stabilize the internal control loop. the recommended capacitance is 10 u f. capacitor values larger than 10 u f are acceptable. pcb layout suggestions: due to large transient cu rrents flow in the v dd , v pos and v ss 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. r&e international, inc. reserves the right to make changes without further notice to any products herein to improve reli ability, function or design. r&e international, inc. does not assume any liability arising out of the applic ation or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. r&e international, inc. products are not authorized for use as critical components in life support dev ices or systems without the express written approval of the president of r&e international, inc. life support devices or systems are devices or systems which are intended for surgical implant into the body to support or sustain life, and whose failure to perform, when properly used in accordance w ith instructions for use provided in the labeling, can be reas onably expected to result in a significant injury to the user. a critical componen t is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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