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| Impala Linear Corporation ILC6301 Advance 100mA DC/DC Converter With KeepAliveTM Output General Description The ILC6301 series of DC-DC converters represents an advanced generation of energy resource management IC's for battery operated and portable systems. This device series showcases the unique ability to power down a primary load while maintaining power regulation to a secondary load that must remain continuously active. Termed "KeepAliveTM" (KA), this feature can supply auxiliary power to serial port receivers, command receivers or control sensors (i.e. IR, RF) while holding other system blocks in standby or power-down mode. Main and KATM outputs are user selected via the SEL pin. Overall device control is accomplished with the use of the On/Off pin. Only one output is active at any time. Both outputs are fixed at either 3.0V or 3.3V. For economy and efficiency, the architecture utilizes a single coil to generate each output. The Main output can supply up to 100mA and the KeepAliveTM section can supply up to 10mA. Each regulator performs buck or boost functions depending on the value of VDD. At VDD > 3.7V automatic control invokes chopper mode operation and for VDD < 3.7V automatic control invokes boost mode operation. The operating range for VDD is 1.8V to 6V. The ILC6301 is available in either the conventional SOIC-8 or the space saving MSOP-8 plastic packaging. Features * Selectable Main (to 100mA) or KeepAliveTM (to 10mA) voltage outputs * Input voltage operating range 1.8V to 6.0V * 3.0V or 3.3V fixed output voltages (custom requirements contact Impala) * Internal controlled synchronous operation requires no external diode * Optimized design requires a minimum of external components One inductor and three capacitors * Low power OFF mode, < 1A @ VDD = 1.8V * Internal oscillator frequency ~ 210kHz 15% * Condition Flag output Applications * Portable and battery operated systems * Remote data collection terminals * Designs requiring continuous communications receive port monitoring * Systems requiring continuous sensor activation for event specific detection * Security devices * Low duty cycle, NLS medical instrumentation Typical Circuit VDD Cbyp On/Off ILC6301 SELect LX VOUT MAIN 20F VSS VOUT KA Flag Out 20F Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 1 100mA DC/DC Converter With KeepAliveTM Output Advance Pin Description ILC6301 Pin Number TBD TBD TBD TBD TBD TBD TBD TBD Pin Name VDD VSS VOUT MAIN VOUT KeepAlive On/Off Select Flag LX Pin Description Input voltage. i.e. Battery. Positive Relative to VSS Common, Ground Main output voltage. Output bypass capacitor connection KA output voltage. Output bypass capacitor connection Digital input activates device. 1 = ON, 0 = OFF Can be tied to VDD Digital input, mode select. 1= Normal, 0 = KeepAlive Digital Output. Indicates low battery status Connection for inductor. (inductor returns to VDD) Can be tied to VDD Functional Block Diagram LX VDD SW_OUT OSC VSS Phase Control DriverControl SWITCHER V-REG KA_OUT Vref ON/OFF SEL Mode Switcher_ON KA_ON Input Control DriverControl KEEP ALIVE FLAG Thermal Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 2 100mA DC/DC Converter With KeepAliveTM Output Advance Absolute Maximum Ratings Parameter Voltage on Main VOUT pin Voltage on KA VOUT pin All other pins Ref to VSS Continuous Power Dissipation under ANY condition Symbol VOUT, MAIN VOUT, KA PD Ratings -0.3 to 7 -0.3 to 7 -0.3 to 7 400 Units V V V mA Maximum Junction Temperature Storage Temperature Lead Temperature. Soldering 10 sec Package Thermal Resistance - SOIC Package Thermal Resistance - MSOP TJ(MAX) TSTG JA, SOIC JA, SOIC 150 -40 to 125 300 154 206 C C C C/W C/W Electrical Characteristics ILC6301 General and Common Parameters Parameter Input Voltage Switch Frequency Reference Voltage OFF Mode Current Switcher to Chop mode threshold Thermal Shutdown Symbol VDD FO Vref IOFF Vmode 3.6 142 150 Min 1.8 180 200 1.217 1A 3.8 163 Typ Max 6.0 240 Units V kHz V A V C VIN Trimmed to center Trimmed Tol. TBD VIN = 1.8. OFF mode active VIN where SW to Chop or Chop to SW mode change occurs Hysteresis ~ 20C Comment Input Parameters Parameter SEL Logic 1 SEL Logic 0 ON/OFF Logic 1 ON/OFF Logic 0 Symbol VIH VIL VIH VIL Min 1.4 Typ Max Units V Comment Switcher is selected KeepAlive is selected Normal operation Stand-by operation 0.5 1.4 0.5 V V V Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 3 100mA DC/DC Converter With KeepAliveTM Output Advance Electrical Characteristics ILC6301 Switcher Section Parameters Parameter Out Voltage Output Current, max Input Current, min Ripple at max load Conversion Efficiency Symbol VOUT IO(MAX) IO(MIN) VR EFF 48 10 60 86 Min Typ 3 or 3.3 100 Max Units V mA mA mV % Comment Mask programmable Short circuit limiting not enabled Regulation and ripple percentage Degrades slightly at lower IOUT LX and COUT as recommended KeepAlive Section Parameters Parameter Out Voltage Output Current, max Input Current, min Ripple at max load Conversion Efficiency Symbol VOUT IO(MAX) IO(MIN) VR EFF 85 1 60 Min Typ 3 or 3.3 10 Max Units V mA mA mV % Comment Fixed Short circuit limiting not enabled Regulation and ripple percentage Degrades slightly at lower IOUT Coil and COUT as recommended Recommended Components Switcher Section Coil Switch out capacitor KeepAlive Output capacitor General Input bypass capacitor 20 (or user TBD) F 20 F Value 10 20 Units H F Note: Customer may choose to optimize recommended values to suit a given application Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 4 100mA DC/DC Converter With KeepAliveTM Output Advance Example Operation VDD Cbyp On/Off ILC6301 LX Main 20F KA 20F VSS System "ON" Voltage Activity Monitoring System S-Port, Sensors, etc. Flag Reset P Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 5 100mA DC/DC Converter With KeepAliveTM Output Advance Package Dimensions All dimensions in inches 8-Pin MSOP 0.197 0.190 Pin 1 identifier 0.155 0.150 0.244 0.228 0.069 0.053 0.060 0.040 0.019 0.013 0.012 0.009 0.8 0.011 0.004 0.050 0.016 8-Pin SOIC 0.019 0.013 0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240 Impala Linear Corporation ILC6301 1.1 (408) 574-3939 www.impalalinear.com Feb 2001 6 |
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