FDMF3170

FDMF3170 Smart Power Stage (SPS) Modules with Integrated Current and Temperature Monitors Features Description   Up to 70 A of Current Handling Capability  Fairchild’s PowerTrench® MOSFETs for Clean Voltage Waveforms and Reduced Ringing The FDMF3170 is ON’s next generation of Smart Power Stage (SPS) solutions with fully optimized, ultracompact, integrated MOSFETs plus driver for highcurrent, high frequency, and synchronous buck DC-DC converters.  30 V / 25 V Breakdown Voltage MOSFETs for Higher Long Term Reliability  Optimized FET Pair for Highest Efficiency at 10% ~ 15 % Duty Cycle High-Performance, Universal Footprint, Copper-Clip 5 mm x 6 mm PQFN Package   Optimized for Switching Frequencies up to 1 MHz   Integrated Temperature Monitor (TMON) Integrated Current Monitor Compliant with Intel’s VR13 Accuracy Requirements Catastrophic Fault Detection - Thermal Flag (OTP) for Over-Temperature Condition - Over-Current Protection FAULT (OCP) - High-Side Short Detect FAULT - Under-Voltage Lockout (UVLO) on VCC and With an integrated approach, the SPS switching power stage is optimized for driver and MOSFET dynamic performance, minimized system inductance, and power MOSFET RDS(ON). The integration of Power MOSFETs with a driver IC also enables advanced high accuracy module thermal and current monitoring. The FDMF3170 provides an output signal (IMON), which reports the real-time module current. IMON is a very accurate, 5 µA/A signal representing the real time Power MOSFET drain currents. The IMON signal can be used to replace output filter inductor DCR current sense or resistor sense methods. The FDMF3170 also includes very accurate module thermal monitor (TMON). TMON is a voltage sourced PTAT signal that is calibrated to provide a 0.8 V output at 25°C with an 8 mV / °C slope. PVCC  Fairchild Green Packaging and RoHS Compliance Applications  CPU and Memory Voltage Regulators in VR13 Purley Systems   High-Current Utility Rails in Server Systems Communications Infrastructure Systems Ordering Information Part Number Rated Output Current Operating Junction Temperature Range Package FDMF3170 70 A -40°C to 125°C 39-Lead, NON-JEDEC, Smart Power Stage 5 mm x 6 mm, 0.45 mm Pitch (PQFN) Package © 2016 Semiconductor Components Industries, LLC FDMF3170 Rev. 1.2 www.onsemi.com FDMF3170 — Smart Power Stage (SPS) Modules with Integrated Current and Temperature Monitors November 2016 FDMF3170 — Smart Power Stage (SPS) Modules with Integrated Current and Temperature Monitors Application Diagram RVCC V5V PVCC PWM Input VIN CVCC CPVCC VCC CVIN IIN VIN PWM BOOT CBOOT enabled EN disabled PHASE IOUT TMON VOUT SW RTMON CTMON FDMF3170 N/C LOUT COUT IMON IIMON_scaled RIMON CIMON REFIN (from PWM controller) REFIN AGND CREFIN Figure 1. PGND Typical Application Diagram Functional Block Diagram PVCC BOOT VOS 3.3V flag on FAULT 2.8V THERMAL MONITOR TMON/ FAULT FAULT LATCH EN_PWM VIN IMON IMON FAULT LOGIC REFIN PHASE 1V/2.4V VCC EN_POR LEVEL SHIFT STARTUP (POR) EN / UVLO PWM CONTROL LOGIC EN_IC REN_DOWN EN_POR EN EN_PWM HDRV SW PVCC LDRV EN_POR RPWM_UP PWM INPUT STAGE PWM GL RPWM_DOWN EN_POR AGND Figure 2. © 2016 Semiconductor Components Industries, LLC FDMF3170 Rev. 1.2 PGND Functional Block Diagram www.onsemi.com 2 6.0mm VOS 1 AGND 2 VCC 3 PVCC 4 PGND 5 GL BOOT PHASE N/C VIN 36 EN 37 PWM 38 N/C 39 TMON/FLT REFIN IMON 5.0mm 35 34 33 32 31 30 40 29 VIN 28 VIN 27 VIN 26 VIN 25 VIN 6 GL 24 PGND 23 PGND 22 PGND 21 PGND 20 PGND 41 14 15 Figure 3. 16 17 18 19 SW 13 SW 12 SW 11 SW 10 SW 9 SW PGND SW 8 SW PGND SW 7 SW Top View PGND Pin Configuration Pin Description Pin # Name 1 VOS 2 AGND 3 VCC Function VR output voltage sensing pin for pre-OVP protection. Leave it floating if not used. Analog Ground for the analog portions of the IC and for substrate. Power Supply input for all analog control functions. 4 PVCC Power Supply input for LS Gate Driver and Boot Diode. 5, 40 PGND Reserved for PVCC de-coupling capacitor return. 6, 41 GL 7-9, 20-24 PGND Low-Side Gate Monitor. Power ground connection for Power Stage high current path. 10-19 SW Switching node junction between high-and low-side MOSFETs. 25-30 VIN Input Voltage to Power Stage. 31 NC No connect. 32 PHASE Return Connection for BOOT capacitor. 33 BOOT Supply for high-side MOSFET gate driver. A capacitor from BOOT to PHASE supplies the charge to turn on the n-channel high side MOSFET. During the freewheeling interval (LS MOSFET on) the high side capacitor is recharged by an internal diode. 34 PWM PWM input to gate driver IC. 35 EN 36 EN=LOW disables most blocks inside IC. EN=HIGH enables all blocks inside IC and requires 4 µs power up time. Temperature and FAULT Reporting Pin. Pin sources a (PTAT) voltage of 0.6 V at 0°C TMON / FLT with an 8 mV/°C slope when no module FAULT is present. In the event of a module FAULT, this pin pulls HIGH to an internal driver IC rail = 3.0 V typical. 37 N/C No connect. Some second source options require this pin to be connected. 38 IMON Current monitor output (output is referenced to REFIN) – 5 µA/A 39 REFIN Referenced voltage used for IMON feature. DC input voltage supplied by external source (not generated on SPS driver IC). © 2016 Semiconductor Components Industries, LLC FDMF3170 Rev. 1.2 www.onsemi.com 3 FDMF3170 — Smart Power Stage (SPS) Modules with Integrated Current and Temperature Monitors Pin Configuration Stresses exceeding the Absolute Maximum Ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. TA = TJ = 25°C Symbol Parameter Min. Max. Unit VVCC Supply Voltage Referenced to AGND -0.3 6.0 V VPVCC Drive Voltage Referenced to AGND -0.3 6.0 V Module Enable Referenced to AGND -0.3 6.0 V V VEN PWM Signal Input Referenced to AGND -0.3 VCC +0.3 Low Gate Manufacturing Test Pin Referenced to AGND -0.3 6.0 V VIMON Current Monitor Output Referenced to AGND -0.3 6.0 V VREFIN Current Monitor Output Reference Referenced to AGND -0.3 6.0 V Referenced to AGND -0.3 6.0 V 5.0 mA Referenced to PGND, AGND -0.3 25.0 V Referenced to PGND, AC