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ADP3210 Datasheet(PDF) 1 Page - ON Semiconductor |
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ADP3210 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 38 page 7-Bit Programmable Multiphase Mobile CPU Synchronous ADP3210 www.onsemi.com FEATURES 1-, 2-, or 3-phase operation at up to 1 MHz per phase Input Voltage Range of 3.3 V to 22 V ±8 mV worst-case differential sensing error over temperature Interleaved PWM outputs for driving external high power MOSFET drivers Automatic power-saving modes maximize efficiency during light load and deeper sleep operation Active current balancing between output phases Independent current limit and load line setting inputs for additional design flexibility 7-bit digitally programmable 0 V to 1.5 V output Overload and short-circuit protection with latch-off delay Built-in clock enable output for delaying CPU clock synchronization until CPU supply voltage stabilizes Output Current Monitor APPLICATIONS Notebook power supplies for next generation Intel® processors GENERAL DESCRIPTION The ADP3210 is a high efficiency, multiphase, synchronous, buck-switching regulator controller optimized for converting notebook battery voltage into the core supply voltage of high performance Intel processors. The part uses an internal 7-bit DAC to read voltage identification (VID) code directly from the processor that sets the output voltage. The phase relationship of the output signals can be configured for 1-, 2-, or 3-phase operation, with interleaved switching. The ADP3210 uses a multimode architecture1 to drive the logic- level PWM outputs at a switching frequency selected by the user depending on the output current requirement. The part switches between multiphase and single-phase operation according to a system signal provided by the CPU. Shedding phases as function of the load maximizes power conversion efficiency under different load conditions. In addition, the ADP3210 supports programmable loadline resistance adjustment. As a result, the output voltage is always optimally positioned for a load transient. Patent 6,683,441. FUNCTIONAL BLOCK DIAGRAM VID DAC Precision Reference FBRTN CLKEN Start Up Delay CLKEN Open Drain PWRGD Start Up Delay CLKEN PWRGD PWRGD Open Drain + - + - CSREF DAC + 200mV DAC - 300mV Soft Transient Delay Soft Start and Soft Transient Control Delay Disable DAC Current Limit Circuit - + CSREF CSSUM CSCOMP ILIM Thermal Throttle Control TTSENSE VRTT OCP Shutdown Delay OVP CSREF 1.55V + - Σ _ + LLINE REF REF Σ + + VEA FB COMP UVLO Shutdown and Bias VCC EN GND Oscillator RPM RT RAMP Driver Logic PWM1 PWM2 PWM3 Current Balancing Circuit SW1 SW2 SW3 DCM1 IMON Current Monitor DPRSLP PSI and DPRSLP Logic PSI OD TRDET TRDET Generator VID DAC Precision Reference FBRTN CLKEN Start Up Delay CLKEN Start Up Delay CLKEN Open Drain CLKEN Open Drain PWRGD Start Up Delay CLKEN CLKEN PWRGD PWRGD Open Drain + - + - + - + - CSREF DAC + 200mV DAC - 300mV Soft Transient Delay Soft Start and Soft Transient Control Delay Disable DAC Current Limit Circuit - + - + CSREF CSSUM CSCOMP ILIM Thermal Throttle Control TTSENSE VRTT OCP Shutdown Delay OVP CSREF 1.55V + - + - Σ Σ _ + LLINE REF REF Σ Σ + + VEA FB COMP UVLO Shutdown and Bias VCC EN GND Oscillator RPM RT RAMP Driver Logic PWM1 PWM2 PWM3 Current Balancing Circuit SW1 SW2 SW3 DCM1 IMON Current Monitor DPRSLP PSI and DPRSLP Logic PSI PSI OD OD TRDET TRDET TRDET Generator TRDET Generator Figure 1. The chip also provides accurate and reliable short-circuit protection with adjustable current limit threshold and a delayed power-good output that is masked during on-the-fly output voltage changes to eliminate false alarm. The ADP3210 performance is specified over the extended commercial temperature range of -10°C to 100°C. The chip is available in a 40-lead QFN package. |
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