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Single-Phase PWM Controller for CPU / GPU Core Power Supply General Description Features

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Single-Phase PWM Controller for CPU / GPU Core Power Supply General Description Features RT8152E/F Single-Phase PWM Controller for CPU / GPU Core Power Supply General Description Features The RT8152E/F is a single phase PWM controller with l Single Phase PWM Controller with Integrated integrated MOSFET drivers. Moreover, it is compliant with MOSFET Driver Intel IMVP6.5 Voltage Regulator Specification to fulfill its l Low-Gain Compensator with CCRCOT Topology mobile CPU core and Render core voltage regulator (Constant Current Ripple Constant On Time) requirements. The RT8152E/F adopts G-NAVP (Green- l 7-bit DAC Native AVP), which is a Richtek's proprietary topology l 0.8% DAC Accuracy derived from finite DC gain compensator constant on-time l 1.5% or 11.5mV System Accuracy mode, making it an easy setting PWM controller meeting l Fixed VBOOT (For CPU Core Only) all Intel AVP (Active Voltage Positioning) mobile CPU/ l Differential Remote Voltage Sensing Render requirements. The output voltage of the RT8152E/ l G-NAVP Topology (Green-Native AVP) F is set by 7-bit VID code. The built-in high accuracy DAC l Programmable Output Transition Slew Rate Control converts the VID code ranging from 0V to 1.5V with l System Thermal Compensated AVP 12.5mV per step. The system accuracy of the controller l Ringing Free Mode at Light Load Condition can reach 1.5%. The part supports VID on-the-fly and mode l Fast Transient Response change on-the-fly functions that are fully compliant with l IMVP6.5 Compatible Power Management States IMVP6.5 specification. It operates in single phase and l Power Good diode emulation modes. It can reach up to 90% efficiency l Clock Enable Output (For CPU Core Only) in different modes according to different loading conditions. l Thermal Throttling The droop load line can be easily programmed by setting l Current Monitor Output the DC gain of the error amplifier. With proper l Switching Frequency Up to 1MHz compensation, the load transient can achieve optimized l OVP, UVP, OCP, OTP, UVLO, NVP AVP performance. This chip controls soft-start and output l 32-Lead WQFN Package transition slew rate via a capacitor. It supports both DCR l RoHS Compliant and Halogen Free and sense resistor current sensing. The RT8152E/F provides power good and thermal throttling output signals Ordering Information RT8152 for IMVP6.5 Render core specification, and additional clock enabling for CPU core specification. It also features Package Type QW : WQFN-32L 5x5 (W-Type) complete fault protection functions including over voltage, Lead Plating System under voltage, negative voltage, over current and thermal G : Green (Halogen Free and Pb Free) shutdown. The RT8152E/F is available in WQFN-32L 5x5 VRON Power small foot print package. E : 1.05V F : 3.3V Applications Note : l IMVP6.5 CPU / Render Core Voltage Regulator Richtek products are : l AVP Step-Down Converter } RoHS compliant and compatible with the current require- l Notebook / Desktop Computer / Servers ments of IPC/JEDEC J-STD-020. } Suitable for use in SnPb or Pb-free soldering processes. DS8152E/F-04 April 2011 www.richtek.com 1 RT8152E/F Marking Information Pin Configurations RT8152EGQW (TOP VIEW) T 0 1 2 3 4 5 6 RT8152EGQW : Product Number T D D D D D D D I I I R I I I I V V V V V V V RT8152E YMDNN : Date Code V GQW 32 31302928 27 26 25 YMDNN NTC 1 24 BOOT OCSET 2 23 UGATE DPRSLPVR 3 22 PHASE VRON 4 21 PGND GND RT8152FGQW PGOOD 5 20 LGATE RT8152FGQW : Product Number CLKEN 6 19 PVDD VCC 7 18 GND RT8152F YMDNN : Date Code 33 SOFT 8 17 TON GQW YMDNN 9 1011 1213 14 15 16 T D N B P N N M E F _ E E N C M S S N S G O I V E M R C S C I WQFN-32L 5x5 Typical Application Circuit VIN 5V to 25V RT8152E/F R1 7 17 R2 R3 5V VCC TON C5 C1 C3 19 PVDD R4 BOOT 24 C4 Q1 C2 31 23 VID0 VID0 UGATE R5 L1 30 22 VID1 VID1 PHASE VOUT Q2 VID2 29 VID2 20 R8 R6 C7 LGATE D1 R7 COUT 28 VID3 VID3 21 PGND C6 27 VID4 VID4 16 ISEN 26 VID5 VID5 ISEN_N 15 25 VID6 VID6 11 R13 C9 3 CMSET DPRSLPVR DPRSLPVR 4 12 VRON VRON VSEN FB 13 5 C12 C13 PWRGD PGOOD CPU VCC_SNS CLKEN 6 CLKEN 32 14 R18 R19 R20 R21 VRTT VRTT COMP VOUT R9 R10 R11 NTC1 9 VCCP RGND CPU VSS_SNS 3.3V C10 1 SOFT 8 R22 NTC 10 R14 R15 R16 2 CM CM VCC OCSET R12 C11 R17 NTC2 18, 33 (Exposed Pad) GND CPU VSS_SNS Figure 1. CPU Core Voltage Regulator www.richtek.com DS8152E/F-04 April 2011 2 RT8152E/F VIN 5V to 25V RT8152E/F R1 7 17 R2 R3 5V VCC TON C5 C1 C3 19 PVDD R4 BOOT 24 C4 Q1 C2 31 23 VID0 VID0 UGATE R5 L1 30 22 VID1 VID1 PHASE VOUT Q2 VID2 29 VID2 20 R8 R6 C7 LGATE D1 R7 COUT 28 VID3 VID3 21 PGND C6 27 VID VID4 16 4 ISEN 26 VID5 VID5 ISEN_N 15 25 VID6 VID6 11 R13 C9 3 CMSET DPRSLPVR DPRSLPVR 4 12 VRON VRON VSEN 6 CLKEN FB 13 C12 C13 5 PWRGD PGOOD GPU VCC_SNS 32 VRTT VRTT 14 R18 R19 R20 R21 COMP VOUT R9 R11 NTC1 9 VCCP RGND GPU VSS_SNS 3.3V C10 1 SOFT 8 R22 NTC 10 R14 R15 R16 2 CM CM VCC OCSET R12 C11 R17 NTC2 18, 33 (Exposed Pad) GND GPU VSS_SNS Figure 2. Render Core Voltage Regulator Functional Pin Description Pin No. Pin Name Pin Function Thermal Detection Input for VRTT Circuit. Connect this pin with a resistor divider 1 NTC from VCC using NTC on the top to set the thermal management threshold level. Over Current Protection Setting. Connect a resistor voltage divider from VCC to 2 OCSET ground, the joint of the resistor divider is connected to OCSET pin, with a voltage VOCSET, to set the over current threshold ILIM. 3 DPRSLPVR Deeper Sleep Mode Signal. 4 VRON Voltage Regulator Enabler. 5 PGOOD Power Good Indicator. Inverted Clock Enable. Pull high by a resistor for CPU core application. This 6 CLKEN open-drain pin is an output indicating the start of the PLL locking of the clock chip. Connect to GND for Render application. 7 VCC Chip Power. Soft-Start. This pin provides soft-start function and slew rate controller. The capacitance of the slew rate control C is restricted to be larger than 10nF. The 8 SOFT feedback voltage of the converter follows the ramping voltage on the SOFT pin during soft-start and other voltage transitions according to different mode of operation and VID change. To be continued DS8152E/F-04 April 2011 www.richtek.com 3 RT8152E/F Pin No. Pin Name Pin Function Return Ground. This pin is the negative node of the differential remote 9 RGND voltage sensing. Current Monitor Output. This pin outputs a voltage proportional to the 10 CM output current. Current Monitor Output Gain Externally Setting. Connect this pin with one resistor to VSEN while CM pin is connected to ground with one another 11 CMSET resistor. In such way, current monitor output gain can be set by the ratio of these two resistors. Positive Voltage Sensing Pin. This pin is the positive node of the 12 VSEN differential voltage sensing. 13 FB Feedback. This is the negative input node of the error amplifier. 14 COMP Compensation. This pin is the output node of the error amplifier. 15 ISEN_N Negative input of the current sense. 16 ISEN Positive input of the current sense. 17 TON Connect this pin to VIN with one resistor. 18, Ground. The exposed pad must be soldered to a large PCB and GND 33 (Exposed Pad) connected to GND for maximum power dissipation. 19 PVDD Driver Power. 20 LGATE Lower Gate Drive. This pin drives the gate of the low side MOSFETs. 21 PGND Driver Ground. This pin is return node of the high side MOSFET driver. Connect this pin 22 PHASE to the high side MOSFET sources together with the low side MOSFET drains and the inductor. 23 UGATE Upper Gate Drive. This pin drives the gate of the high side MOSFETs. Bootstrap Power Input. This pin powers the high side MOSFET drivers. 24 BOOT Connect this pin to bootstrap capacitor. Voltage ID. DAC voltage identification inputs for IMVP6.5. VID6 to 25 to 31 The logic threshold is 30% of the VCCP as the maximum value for low VID0 state and 70% of the VCCP as the minimum value for the high state. Voltage Regulator Thermal Throttling. This open-drain output pin will be 32 VRTT pulled low when the preset temperature level is exceeded. www.richtek.com DS8152E/F-04 April 2011 4 RT8152E/F Table 1. IMVP6.5 VID Code Table VID6 VID5 VID4 VID3 VID2 VID1 VID0 Output VID6 VID5 VID4 VID3 VID2 VID1 VID0 Output 0 0 0 0 0 0 0 1.5000V 0 1 0 0 0 0 1 1.0875V 0 0 0 0 0 0 1 1.4875V 0 1 0 0 0 1 0 1.0750V 0 0 0 0 0 1 0 1.4750V 0 1 0 0 0 1 1 1.0625V 0 0 0 0 0 1 1 1.4625V 0 1 0 0 1 0 0 1.0500V 0 0 0 0 1 0 0 1.4500V 0 1 0 0 1 0 1 1.0375V 0 0 0 0 1 0 1 1.4375V 0 1 0 0 1 1 0 1.0250V 0 0 0 0 1 1 0 1.4250V 0 1 0 0 1 1 1 1.0125V 0 0 0 0 1 1 1 1.4125V 0 1 0 1 0 0 0 1.0000V 0 0 0 1 0 0 0 1.4000V 0 1 0 1 0 0 1 0.9875V 0 0 0 1 0 0 1 1.3875V 0 1 0 1 0 1 0 0.9750V 0 0 0 1 0 1 0 1.3750V 0 1 0 1 0 1 1 0.9625V 0 0 0 1 0 1 1 1.3625V 0 1 0 1 1 0 0 0.9500V 0 0 0 1 1 0 0 1.3500V 0 1 0 1 1 0 1 0.9375V 0 0 0 1 1 0 1 1.3375V 0 1 0 1 1 1 0 0.9250V 0 0 0 1 1 1 0 1.3250V 0 1 0 1 1 1 1 0.9125V 0 0 0 1 1 1 1 1.3125V 0 1 1 0 0 0 0 0.9000V 0 0 1 0 0 0 0 1.3000V 0 1 1 0 0 0 1 0.8875V 0 0 1 0 0 0 1 1.2875V 0 1 1 0 0 1 0 0.8750V 0 0 1 0 0 1 0 1.2750V 0 1 1 0 0 1 1 0.8625V 0 0 1 0 0 1 1 1.2625V 0 1 1 0 1 0 0 0.8500V 0 0 1 0 1 0 0 1.2500V 0 1 1 0 1 0 1 0.8375V 0 0 1 0 1 0 1 1.2375V 0 1 1 0 1 1 0 0.8250V 0 0 1 0 1 1 0 1.2250V 0 1 1 0 1 1 1 0.8125V 0 0 1 0 1 1 1 1.2125V 0 1 1 1 0 0 0 0.8000V 0 0 1 1 0 0 0 1.2000V 0 1 1 1 0 0 1 0.7875V 0 0 1 1 0 0 1 1.1875V 0 1 1 1 0 1 0 0.7750V 0 0 1 1 0 1 0 1.1750V 0 1 1 1 0 1 1 0.7625V 0 0 1 1 0 1 1 1.1625V 0 1 1 1 1 0 0 0.7500V 0 0 1 1 1 0 0 1.1500V 0 1 1 1 1 0 1 0.7375V 0 0 1 1 1 0 1 1.1375V 0 1 1 1 1 1 0 0.7250V 0 0 1 1 1 1 0 1.1250V 0 1 1 1 1 1 1 0.7125V 0 0 1 1 1 1 1 1.1125V 1 0 0 0 0 0 0 0.7000V 0 1 0 0 0 0 0 1.1000V 1 0 0 0 0 0 1 0.6875V To be continued DS8152E/F-04 April 2011 www.richtek.com 5 RT8152E/F VID6 VID5 VID4 VID3
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