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MP2884A Datasheet(PDF) 4 Page - Monolithic Power Systems |
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MP2884A Datasheet(HTML) 4 Page - Monolithic Power Systems |
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4 / 107 page  MP2884A – DIGITAL PWM CONTROLLER WITH PMBUS AND PWM-VID MP2884A Rev. 1.01 www.MonolithicPower.com 4 12/25/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. PIN FUNCTIONS Package Pin # Name Type (1) Description 1 TALERT# D [O] Open-drain VR thermal indicator. TALERT# is pulled low if the temperature exceeds the programmed threshold from either VTEMP or TSNS. 2 T1 D [O] Test pin 1. Leave T1 floating. 3 T2 D [O] Test pin 2. Leave T2 floating. 4 T3 D [O] Test pin 3. Leave T3 floating. 5 - 7 NC D [O] No connection. Leave NC floating. 8 PWM4 D [O] Tri-state logic-level PWM outputs. Each output is connected to the PWM input of the Intelli-Phase. The low logic level is 0V. The high logic level is 3.3V. The mid-state logic level is 1.5V (or high impedance). Float PWMx if it is not being used. 9 PWM3 D [O] 10 PWM2 D [O] 11 PWM1 D [O] 12 VDD33 Power 3.3V power supply input. Connect a 1µF bypass capacitor from VDD33 to AGND. 13 - 16 NC A [I] No connection. Leave NC floating. 17 CS4 A [I] Phase 1~4 current sense input. Short CSx to AGND or CSSUM if it is not being used. 18 CS3 A [I] 19 CS2 A [I] 20 CS1 A [I] 21 CSSUM A [I] Total phase current sensing input. CSSUM is used for load-line and over-current protections. Connect the active phases' CS signals together to CSSUM through the current-sense resistors. 22 VINSEN A [I] Input voltage sensing. Place a resistor divider from the power stage (VIN) to VINSEN. 23 VDD18 Power 1.8V LDO output. VDD18 provides a power supply for the internal digital circuit. Connect a 1µF bypass capacitor from VDD18 to AGND. 24 ADDR A [I] PMBus address setting. 25 IMON A [I/O] Analog total average current sensing signal. IMON sources a current proportional to the sensed total average current from CSSUM. IMON is used for load-current reporting. 26 IREF A [I/O] Internal bias current set. Connect a 61.9kΩ, 1% accuracy resistor from IREF to AGND. 27 T4 A [I] Test pin 4. Short T4 to AGND. 28 VDIFF A [O] Output of the differential remote sense amplifier. 29 VFB A [I/O] Feedback. VFB sources a current (Idroop) proportional to the sensed output current. This current flows through the resistor (Rdroop) between VFB and VDIFF to create a voltage drop proportional to the load current to achieve the load-line function. 30 T5 A [I] Test pin 5. Short T5 to AGND. 31 VOSEN A [I] Remote voltage sensing positive input. VOSEN is connected to the VR output voltage directly at the load. Route VOSEN with VORTN differentially. 32 VORTN A [I] Remote voltage sensing return input. VORTN is connected to the ground directly at the load. Route VORTN with VOSEN differentially. |
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