ADP3211AMNR2G ON Semiconductor, ADP3211AMNR2G Datasheet
ADP3211AMNR2G
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ADP3211AMNR2G Summary of contents
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ADP3211, ADP3211A 7-Bit, Programmable, Single-Phase, Synchronous Buck Controller The ADP3211 is a highly efficient, single−phase, synchronous buck switching regulator controller. With its integrated driver, the ADP3211 is optimized for converting the notebook battery voltage to the supply voltage required by ...
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GND VCC EN UVLO Shutdown and Bias COMP VEA FB − REF + + CSREF LLINE 1.55V DAC + 200mV − + CSREF − + DAC − 300 mV PWRGD Startup PWRGD Delay Open PWRGD ...
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ABSOLUTE MAXIMUM RATINGS Parameter V CC FBRTN, PGND BST, DRVH DC t < 200 ns BST < 200 ns BST < 200 ns DRVH to SW DRVL to PGND DC ...
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PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic 1 PWRGD Power−Good Output. Open−drain output. A low logic state means that the output voltage is outside of the VID DAC defined range. 2 IMON Current Monitor Output. This pin sources current proportional to ...
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ELECTRICAL CHARACTERISTICS ( −40°C to 100°C, unless otherwise noted. (Note 1) Current entering a pin (sunk by the device) has a positive sign. A Parameter Symbol VOLTAGE CONTROL − Voltage Error Amplifier (VEAMP) FB, LLINE Voltage Range V ...
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ELECTRICAL CHARACTERISTICS ( −40°C to 100°C, unless otherwise noted. (Note 1) Current entering a pin (sunk by the device) has a positive sign. A Parameter Symbol VOLTAGE MONITORING and PROTECTION − Power Good PWRGD Low Voltage V PWRGD ...
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ELECTRICAL CHARACTERISTICS ( −40°C to 100°C, unless otherwise noted. (Note 1) Current entering a pin (sunk by the device) has a positive sign. A Parameter Symbol PULSE WIDTH MODULATOR − Clock Oscillator R Voltage PWM ...
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ELECTRICAL CHARACTERISTICS ( −40°C to 100°C, unless otherwise noted. (Note 1) Current entering a pin (sunk by the device) has a positive sign. A Parameter Symbol HIGH−SIDE MOSFET DRIVER Pullup Resistance, Sourcing Current Pulldown Resistance, Sinking Current Transition ...
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TYPICAL PERFORMANCE CHARACTERISTICS V VID Output Voltage 1 VID5 Switch 2 Node 3 1: 200mV/div 3 : 10V/div 2: 2V/div Input = 12V, 1A Load VID Step 0.7V to 1.2V Figure 3. VID Change Soft Transient 300 250 S W ...
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TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage 0.5V/div 3: 5V/div 2ms/div GPU = 0V 4: 5V/div 2: 5V/div Figure 9. Startup Waveforms CPU Mode Output Voltage 1 Switch Node Low Side Gate Drive ...
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TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage 1 Switch Node 2 Input = 12V 40 ms/div 1: 50mV/div Output = 1.2V 2: 10V/div 15A to 3A Step Figure 15. Load Transient Output Voltage 1 Switch Node 2 200 ms/div Input = 12V ...
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Theory of Operation The ADP3211 is a Ramp Pulse Modulated (RPM) controller for synchronous buck Intel GMCH and CPU core power supply. The internal 7−bit VID DAC conforms to the Intel IMVP−6.5 specifications. The ADP3211 is a stable, high performance ...
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CLOCK RAMP OSCILLATOR 0.2 V VCC RAMP COMP Setting Switch Frequency Master Clock Frequency in PWM Mode When the ADP3211 runs in PWM, the clock frequency ...
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MOSFET. The current sense amplifier can be configured several ways, depending on system optimization objectives, and the current information can be obtained by: • Output inductor ESR sensing without the use of a ...
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GPU = 0 V Figure 22. ADP3211 Powerup Sequence for CPU V5_S EN V CCGFX PGDELAY PWRGD GPU = 5.0 V Figure 23. Powerup Sequence for GPU VID Change and Soft Transient With GPU connected to 5.0 V for GPU ...
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Output Voltage 0.5 V/div SWITCH NODE 10 V/div PWRGD 5.0 V/div 2.0 V/div CLKEN 2 ms/div CURRENT LIMIT LATCHED APPLIED Figure 24. Current Overload The latchoff function can be reset either by removing and reapplying briefly pulling ...
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Inductor Current Switch Node Voltage Figure 30. Inductor Current and Switch Node in DCM LOW SIDE GATE 5V/div SWITCH NODE 5.0 V/div CSREF to CSCOMP 50mV/div 4 ms/div Figure 31. Single−Phase Waveforms in ...
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Overlay Protection Circuit The overlap protection circuit prevents both main power switches, the high side MOSFET Q1 and the low side MOSFET Q2, from being on at the same time. This is done to prevent shoot−through currents from flowing through ...
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Table 1. VID Code Table VID6 VID5 VID4 ...
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Table 1. VID Code Table VID6 VID5 VID4 ...
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PWRGD IREF EN RPM VID0 R14 200 kΩ RT VID1 R15 340 kΩ RAMP VID2 LLINE VID3 R24 DNP CSREF VID4 CSFB VID5 CSCOMP VID6 Figure 33. Typical Application Circuit http://onsemi.com 21 V3.3V VR_ON VID0 VID1 VID2 VID3 VID4 VID5 ...
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Application Information The ADP3211 application circuit should be fine−tuned in the final design. The equations in the Application Information section are used as a starting point for a new design. The design parameters for a typical IMVP−6.5− compliant GPU core ...
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VID MIN VID O MIN RIPPLE In this example assumed to be the ESR of the ...
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Place as close as possible to nearest inductor ADP3211 CSCOMP CSFB − CSREF + Figure 34. Temperature−Compensation Circuit Values The following procedure and expressions yield values for and R (the thermistor value at 25°C) for CS1 ...
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C X(MIN) C X(MAX) To meet the conditions of these expressions and the transient response, the ESR of the bulk capacitor bank (R should be less than two times the droop resistance, R the C is greater than C X(MIN) ...
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R DS(SF) be less than 13 room temperature high temperature. Another important factor for the synchronous MOSFET is the input capacitance and feedback capacitance. The ratio of the feedback to ...
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MOSFET turns on. The switch node ringing could cause EMI system failures and increased stress on the power components and controller. The RC snubber should be placed as close as possible to the low side ...
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The expressions that follow compute the time constants for the poles and zeros in the system and are intended to yield an optimal starting point for the design; some adjustments may be necessary to account for PCB and component parasitic ...
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Measure the output ripple with no load and with a full load with scope, making sure both are within the specifications. Set the AC Load Line 1. Remove the dc load from the circuit and connect a dynamic load. ...
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V TRANREL V DROOP Figure 39. Transient Setting Waveform, Load Release Layout and Component Placement The following guidelines are recommended for optimal performance of a switching regulator system. General Recommendations 1. For best results, use a PCB ...
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... Device Number* Temperature Range ADP3211MNR2G −40°C to 100°C ADP3211AMNR2G −40°C to 100°C †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. *The “G’’ suffix indicates Pb−Free package. ...
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... X e 0.63 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81− ...