RE46C117E8F Microchip

R&E International A Subsidiary of Microchip Technology Inc. RE46C117 DC to DC Converter and Piezoelectric Horn Driver Product Specification Features General Description Low Quiescent Current The RE46C117 is intended for use in 3V or 4.5V 10V Up Converter battery or battery-backed applications. The circuit Low Horn Driver Ron features a DC-to-DC up-converter and driver circuit suitable for driving a piezoelectric horn Available in Standard Packaging or RoHS Compliant Pb Free Packaging Applications Pin Configuration Smoke detectors CO Detectors Personal Security Products Electronic Toys 1 8 FEED HRNEN VDD 2 7 HORNS LX 3 6 HORNB 4 5 VSS VO ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VALUE UNITS Supply Voltage V 5 V DD V 12 V OUT Input Voltage Range Except FEED V -.3 to V+.3 V in dd FEED Input Voltage Range V -10 to +22 V infd Input Current except FEED I 10 mA in Operating Temperature T 0 to 50 A C Storage Temperature T -55 to 125 C STG Continuous Operating Current I 40 mA O (HornS, HornB, VO) 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 2009 Microchip Technology Inc. DS22159B-page 1 RE46C117 DC to DC Converter and Piezoelectric Horn Driver R&E International Product Specification A Subsidiary of Microchip Technology Inc. Electrical Characteristics Limits apply at Vdd=3V, Vss=0V, Cvo=10uF, T =0C to 50C, unless otherwise noted. A Typical values are at T =27C. A Limits Units Min Typ Max Parameter Symbol Test Conditions Operating Supply Voltage Vdd 2.0 5.0 V Standby Supply HRNEN low No loads DC-DC Iddstby 14 uA Current Running Quiescent Supply HRNEN low No loads Iddq 7 10.5 uA Current VO=5V Vlx=0.5V Same conditions as above for Iddq Quiescent Ivo Ivoq 4 7.5 uA Iin HRNEN Input, Vin=VDD or VSS -100 100 nA Input Leakage Iihf FEED=+22V VO=10V 20 50 uA 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 HORNB or HORNS Iout=16mA Output Low Voltage Vol1 .3 .5 V Vdd=3V Output High HORNB or HORNS VO=10V Voh1 9.5 9.7 V Voltage Iout=-16mA Vdd=HRNEN=3V 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 Vobvt Falling edge of VO 3.2 3.6 4.0 V Threshold 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. 2009 Microchip Technology Inc. DS22159B-page 2