ILC6301 IMPALA | Alldatasheet

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Technical content

100mA DC/DC Converter With KeepAlive™ Output Impala Linear Corporation Impala Linear Corporation 1(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1 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 pri- mary load while maintaining power regulation to a second- ary load that must remain continuously active. Termed “KeepAlive™” (KA), this feature can supply auxiliary power to serial port receivers, command receivers or control sen- sors (i.e. IR, RF) while holding other system blocks in stand- by or power-down mode. Main and KA™ outputs are user selected via the SEL pin. Overall device control is accom- plished 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 gen- erate each output. The Main output can supply up to 100mA and the KeepAlive™ section can supply up to 10mA. Each regulator performs buck or boost functions depending on the value of V DD. At V DD > 3.7V automatic control invokes chopper mode operation and for VDD < 3.7V automatic con- trol 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.

  • Selectable Main (to 100mA) or KeepAlive™ (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, < 1µA @ V DD = 1.8V
  • Internal oscillator frequency ~ 210kHz ±15%
  • Condition Flag output
  • 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 ILC6301 VDD Cbyp On/Off SELect VSS 20µF 20µF Flag Out VOUT MAIN VOUT KA LX Advance General Description Features

Applications

Input voltage. i.e. Battery. Positive Relative to V SS 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 V DD Digital input, mode select. 1= Normal, 0 = KeepAlive Digital Output. Indicates low battery status Connection for inductor. (inductor returns to V DD) Can be tied to VDD Driver- Control SWITCHER KEEP ALIVE Driver- Control SW_OUT KA_OUT LX Thermal Input Control ON/OFF SEL FLAG KA_ON Switcher_ON Phase Control Mode V-REG Vref OSC VSS VDD 100mA DC/DC Converter With KeepAlive™ Output Advance Impala Linear Corporation 2(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1 Pin Description ILC6301 Functional Block Diagram

VOUT , MAIN VOUT , KA PD TJ(MAX) TSTG θJA, SOIC θJA, SOIC Symbol VDD FO Vref IOFF Vmode Parameter Voltage on Main V OUT pin Voltage on KA VOUT pin All other pins Ref to V SS Continuous Power Dissipation under ANY condition Maximum Junction Temperature Storage Temperature Lead Temperature. Soldering 10 sec Package Thermal Resistance - SOIC Package Thermal Resistance - MSOP Ratings -0.3 to 7 -0.3 to 7 -0.3 to 7 400 150 -40 to 125 300 154 206 Units V V V mA °C/W °C/W Parameter Input Voltage Switch Frequency Reference Voltage OFF Mode Current Switcher to Chop mode threshold Thermal Shutdown Min 1.8 180 3.6 142 Typ 200 1.217 150 Max 6.0 240 1µA 3.8 163 Units V kHz V µA V Comment VIN Trimmed to center Trimmed Tol. TBD V IN = 1.8. OFF mode active VIN where SW to Chop or Chop to SW mode change occurs Hysteresis ~ 20°C General and Common Parameters Parameter SEL Logic 1 SEL Logic 0 ON/OFF Logic 1 ON/OFF Logic 0 Symbol VIH VIL VIH VIL Min 1.4 1.4 Typ Max 0.5 0.5 Units V V V V Comment Switcher is selected KeepAlive is selected Normal operation Stand-by operation Input Parameters 100mA DC/DC Converter With KeepAlive™ Output Advance Impala Linear Corporation 3(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1 Absolute Maximum Ratings

IO(MAX) IO(MIN) VR EFF Units µH µF µF µF Value 20 (or user TBD) Parameter Out Voltage Output Current, max Input Current, min Ripple at max load Conversion Efficiency Symbol VOUT IO(MAX) IO(MIN) VR EFF Min Typ 3 or 3.3 Max 100 Units V mA mA mV Comment Mask programmable Short circuit limiting not enabled Regulation and ripple percentage Degrades slightly at lower I OUT LX and COUT as recommended Switcher Section Parameters Parameter Out Voltage Output Current, max Input Current, min Ripple at max load Conversion Efficiency Min Typ 3 or 3.3 Max Units V mA mA mV Comment Fixed Short circuit limiting not enabled Regulation and ripple percentage Degrades slightly at lower I OUT Coil and COUT as recommended KeepAlive Section Parameters Switcher Section Coil Switch out capacitor KeepAlive Output capacitor General Input bypass capacitor Recommended Components Note: Customer may choose to optimize recommended values to suit a given application 100mA DC/DC Converter With KeepAlive™ Output Advance Impala Linear Corporation 4(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1

20µF 20µF Flag Main KA LX System "ON" Voltage Activity Monitoring System S-Port, Sensors, etc. Reset µP 100mA DC/DC Converter With KeepAlive™ Output Advance Impala Linear Corporation 5(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1 Example Operation

0.197 0.190 0.155 0.150 0.244 0.228 0.069 0.053 0.011 0.004 0.060 0.040 0.019 0.013 0.050 0.016 0.012 0.009 0.8° 0.260 0.240 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 All dimensions in inches 8-Pin MSOP 8-Pin SOIC 100mA DC/DC Converter With KeepAlive™ Output Advance Impala Linear Corporation 6(408) 574-3939 www.impalalinear.com Feb 2001 ILC6301 1.1 Package Dimensions