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ADP3209CJCPZ-RL Datasheet(PDF) 1 Page - ON Semiconductor |
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ADP3209CJCPZ-RL Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 32 page  5-Bit, Programmable, Single-Phase, Synchronous Buck Controller ADP3209 ©2008 SCILLC. All rights reserved. Publication Order Number: January 2008 – Rev. 2 ADP3209/D FEATURES Single-chip solution Fully compatible with the Intel® GMCH chipset voltage regulator specifications Integrated MOSFET drivers ±8 mV worst-case differentially sensed core voltage error over temperature Automatic power-saving modes maximize efficiency during light load operation Soft transient control reduces inrush current and audio noise Independent current limit and load line setting inputs for additional design flexibility Built-in power-good masking supports voltage identification (VID) on-the-fly transients 5-bit, digitally programmable DAC with 0.4 V to 1.25 V output Short-circuit protection with programmable latch-off delay Output power or current monitor options 32-lead LFCSP APPLICATIONS Notebook power supplies for next-generation Intel chipsets GENERAL DESCRIPTION The ADP3209 is a highly efficient, single-phase, synchronous buck switching regulator controller. With its integrated drivers, the ADP3209 is optimized for converting the notebook battery voltage to render the supply voltage required by high performance Intel chipsets. An internal 5-bit DAC is used to read a VID code directly from the chipset and to set the GMCH core voltage to a value within the range of 0.4 V to 1.25 V. The ADP3209 uses a multimode architecture. It provides program- mable switching frequency that can be optimized for efficiency depending on the output current requirement. In addition, the ADP3209 includes a programmable load line slope function to adjust the output voltage as a function of the load current so that the core voltage is always optimally positioned for a load transient. The ADP3209 also provides accurate and reliable current overload protection and a delayed power-good output. The IC supports on-the-fly output voltage changes requested by the chipset. The ADP3209 is specified over the extended commercial tempera- ture range of 0°C to 100°C and is available in a 32-lead LFCSP. FUNCTIONAL BLOCK DIAGRAM VREF VDAC FBRTN VID DAC VID4 VID3 VID2 VID1 VID0 REFERENCE SELECT ST HOUSE- KEEPING VARFREQ SS PWRGD EN VCC GND REFTH UVLO REF VREF BIAS BIAS PMONFS PMON PMON PWM CSAVG – + – + – + – + +– CLREF CLTHSEL CSAMP CLIM CMP ERR AMP – + – + SS ADP3209 RT DRVH BST SW DRVL PGND PVCC DRV ODB IN ODA VRPM RPM RAMP OSCILLATOR PWM CMPS PWM LATCH PHASE CONTROL SWITCH AMPS RAMP GENER- ATOR –+ COMP FB LLINE CSFB CSREF CSCOMP CLIM FBRTN Figure 1. |
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