IR3558MTRPBF

45A Integrated PowIRstage® FEATURES DESCRIPTION  Peak efficiency up to 94.0% at 1.2V  Integrated driver, control MOSFET, synchronous MOSFET and Schottky diode  Input voltage (VIN) operating range of 4.5V to 15V  Separate LVCC and HVCC from 4.5V to 13.2V to optimize converter efficiency  Output current capability of 45A DC  Switching frequency up to 1.0MHz  Programmable thermal flag threshold from 70°C to 150°C  5V VCC with under voltage lockout  Low quiescent current  Enable control  Selectable regular 3.3V tri-state PWM logic or IR Active Tri-Level (ATL) PWM logic  PCB footprint compatible with most IR3551 pins  Efficient dual sided cooling The IR3558 integrated PowIRstage® is a synchronous buck gate driver co-packed with a control MOSFET and a synchronous MOSFET with integrated Schottky diode. It is optimized internally for PCB layout, heat transfer and driver/MOSFET timing. Custom designed gate driver and MOSFET combination enables higher efficiency at lower output voltages required by cutting edge CPU, GPU and DDR memory designs. Up to 1.0MHz switching frequency enables fast transient response, allowing miniaturization of output inductors as well as input and output capacitors while maintaining high efficiency. The IR3558’s superior efficiency enables smallest size and lower solution cost. The IR3558 PCB footprint is compatible with most pins of the IR3551 (50A). The IR3558 provides two selectable PWM logic modes, the 3.3V tri-state PWM logic or International Rectifier’s Active TM Tri-Level (ATL) PWM logic. The ATL PWM logic eliminates a dedicated Body-Braking® pin and improves the transient response of the converter during load release. The IR3558 provides a thermal flag output with programmable threshold from 70°C to 150°C, which makes it possible to adjust the thermal protection threshold based on the PCB layout and thermal distribution.  Small 5mm x 6mm x 0.9mm PQFN package  Lead free RoHS compliant package APPLICATIONS  High current, low profile DC-DC converters BASIC APPLICATION IR3558 VIN LGND VIN 4.5V to 15V BOOST OT# OT# OTSET VOUT SW PWM PWM ENABLE EN MODE CS+ PVCC CS- HVCC 4.5V to 13.2V LVCC PGND Efficiency (%) VCC 5V 95 20 93 18 91 16 89 14 87 12 85 10 83 8 81 6 79 4 77 2 75 Power Loss (W) The IR3558 is optimized specifically for CPU core power delivery in server applications. The ability to meet the stringent requirements of the server market also makes the IR3558 ideally suited to powering GPU and DDR memory designs and other high current applications.  Voltage Regulators for CPUs, GPUs, and DDR memory arrays VCC IR3558 0 0 5 10 15 20 25 30 35 40 45 Output Current (A) Figure 1: IR3558 Basic Application Circuit 1 September 10, 2012 | FINAL DATASHEET Figure 2: Typical IR3558 Efficiency & Power Loss (See Note 2 on Page 7) 45A Integrated PowIRstage® PINOUT DIAGRAM IR3558 ORDERING INFORMATION Package Tape & Reel Qty Part Number PQFN, 28 Lead 5mm x 6mm 4000 IR3558MTRPBF Figure 3: IR3558 Pin Diagram, Top View TYPICAL APPLICATION DIAGRAM VCC 4.5V to 5.5V C3 0.1uF R1 10k IR3558 OT# PWM ENABLE 21 OT# 22 PWM 23 EN 25 MODE MODE OTSET PVCC 4.5V to 13.2V C4 1uF 26 OTSET 2 LVCC 3 HVCC 1 16-19 VCC VIN C1 0.1uF BOOST Gate Drivers and Over Temperature Detection L1 150nH C8 470uF VOUT R2 2.49k PGND 14, 15 PGND 4, 27 VIN 4.5V to 15V C7 22uF 6-13 LGND 24 September 10, 2012 | FINAL DATASHEET C5 0.22uF SW Figure 4: Application Circuit 2 20 C2 10uF x 2 C6 0.22uF CS+ CS- 45A Integrated PowIRstage® IR3558 FUNCTIONAL BLOCK DIAGRAM BOOST LVCC 20 2 VIN VIN VIN VIN 16 17 18 19 IR3558 HVCC 3 VCC 1 PWM 22 EN 23 MODE 25 OT# 21 OTSET 26 LGND 24 VCC Thermal Detection Power-on Reset (POR), PWM Mode, Reference, and Dead-time Control 4 27 PGND PGND Driver September 10, 2012 | FINAL DATASHEET SW 7 SW 8 SW 9 SW 10 SW 11 SW 12 SW 13 SW Driver 5 28 GATEL GATEL Figure 5: IR3558 Functional Block Diagram 3 6 14 15 PGND PGND 45A Integrated PowIRstage® IR3558 PIN DESCRIPTIONS PIN # PIN NAME PIN DESCRIPTION 1 VCC Bias voltage for control logic. Connect VCC to a 5V supply. Connect a minimum 0.1uF capacitor between VCC and LGND. 2 LVCC Supply voltage for the low-side driver. Connect LVCC to a 4.5V to 13.2V supply. Connect a minimum 0.1uF capacitor between LVCC and PGND (pin 4). 3 HVCC Supply voltage for the high-side driver. Connect HVCC to a 4.5V to 13.2V supply. Connect a minimum 0.1uF capacitor between HVCC and PGND (pin 4). 4, 14, 15, 27 PGND Power ground of low-side MOSFET driver and the synchronous MOSFET. 5, 28 GATEL Low-side MOSFET driver pins that can be connected to a test point in order to observe the waveform. 6 – 13 SW Switch node of synchronous buck converter. VIN High current input voltage connection. Recommended operating range is 4.5V to 15V. Connect at least two 10uF 1206 ceramic capacitors and a 0.1uF 0402 ceramic capacitor. Place the capacitors as close as possible to VIN pins and PGND pins (14-15). The 0.1uF 0402 capacitor should be on the same side of the PCB as the IR3558. 20 BOOST Bootstrap capacitor connection. The bootstrap capacitor provides the charge to turn on the control MOSFET. Connect a minimum 0.22µF capacitor from BOOST to SW pin. Place the capacitor as close to BOOST pin as possible and minimize the parasitic inductance of the connection from the capacitor to SW pin. A 1Ω to 4Ω series resistor may be added to slow down the SW rising and limit the surge current into the bootstrap capacitor on start-up. 21 OT# Open drain output of the phase fault circuits. Connect to an external pull-up resistor. Output is low when an over temperature condition inside the device is detected. 22 PWM PWM control input. Connect this pin to the PWM output of a controller that outputs either a 3.3V tri-state PWM signal or a 1.8V International Rectifier’s Active Tri-Level PWM signal. 23 EN Enable control. 3.3V logic level input. Pulling this pin high to enable the device and grounding it to shut down both MOSFETs and enter low quiescent mode. 24 LGND Signal ground. Driver control logic, analog circuits and IC substrate are referenced to this pin. 25 MODE PWM mode selection. Grounding this pin to select the regular 3.3V tri-state PWM logic or connecting it to VCC to select International Rectifier’s Active Tri-Level PWM logic. 26 OTSET Over temperature set. The default is 150°C when this pin is floated. A resistor from this pin to ground programs the over temperature threshold from 70°C to 150°C. See “Over Temperature Threshold Set Resistor ROTSET” Section for the resistor selection details. 16 – 19 4 September 10, 2012 | FINAL DATASHEET 45A Integrated PowIRstage® IR3558 ABSOLUTE MAXIMUM RATINGS Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. PIN Number PIN NAME VMAX VMIN ISOURCE ISINK 1 VCC 6.5V -0.3V NA 10mA 2 LVCC 15V -0.3V NA 3 HVCC 15V -0.3V NA 4, 27 PGND 0.3V -0.3V 15mA 1A for 100ns, 100mA DC 1A for 100ns, 100mA DC 15mA 5, 28 GATEL LVCC + 0.3V 1A for 100ns, 200mA DC 1A for 100ns, 200mA DC 6-13 SW 2 25V 55A RMS 25A RMS 14, 15 PGND NA -3V for 20ns, -0.3V DC -5V for 20ns, -0.3V DC NA 25A RMS 55A RMS 16-19 2 25V -0.3V VIN 5A RMS 20A RMS 5A for 100ns, 100mA DC 20mA 35V -0.3V OT# VCC + 0.3V -0.3V 1A for 100ns, 100mA DC 1mA 22 PWM VCC + 0.3V -0.3V 1mA 1mA 23 EN VCC + 0.3V -0.3V 1mA 1mA 20 BOOST 21 1 24 LGND 0.3V -0.3V 10mA NA 25 MODE VCC + 0.3V -0.3V 1mA 1mA 26 OTSET VCC + 0.3V -0.3V 1mA 1mA Note: 1. Maximum BOOST – SW = 15V. 2. Maximum VIN – SW = 25V. 3. All the maximum voltage ratings are referenced to PGND (Pins 14 and 15). THERMAL INFORMATION Thermal Resistance, Junction to Top (θJC_TOP) 18.2 °C/W Thermal Resistance, Junction to PCB (pin 15) (θJB) 2.6 °C/W Thermal Resistance (θJA) 1 20.8 °C/W Maximum Operating Junction Temperature -40 to 150°C Maximum Storage Temperature Range -65°C to 150°C ESD rating HBM Class 1A JEDEC Standard MSL Rating 3 Reflow Temperature 260°C Note: 1. Thermal Resistance (θJA) is measured with the component mounted on a high effective thermal conductivity test board in free air. Refer to International Rectifier Application Note AN-994 for details. 5 September 10, 2012 | FINAL DATASHEET 45A Integrated PowIRstage® IR3558 ELECTRICAL SPECIFICATIONS The electrical characteristics involve the spread of values guaranteed within the recommended operating conditions. Typical values represent the median values, which are related to 25°C. RECOMMENDED OPERATING CONDITIONS FOR RELIABLE OPERATION WITH MARGIN PARAMETER SYMBOL MIN MAX UNIT Recommended VIN Range VIN 4.5 15 V Recommended VCC Range VCC 4.5 5.5 V Recommended LVCC Range LVCC 4.5 13.2 V Recommended HVCC Range HVCC 4.5 13.2 V Recommended Switching Frequency ƒSW 200 1000 kHz Recommended Operating Junction Temperature TJ -40 125 °C ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Efficiency PowIRstage Peak Efficiency η Note 2, Figure 2 94.0 % Note 3, Figure 8 93.0 % PWM Tri-state Mode (Figure 6) PWM Input High Threshold VPWM_HIGH PWM Tri-state to High 2.0 2.5 3.0 V PWM Input Low Threshold VPWM_LOW PWM Tri-state to Low 0.7 0.8 0.9 V PWM Tri-state Float Voltage VPWM_TRI 0.85 1.60 2.55 V Hysteresis VPWM_HYS Tri-state Hold OFF Time TPWM_HOLD PWM Floating Active to Tri-state or Tristate to Active, Note 1 Note 1 PWM Input Impedance RPWM_SINK Minimum Pulse Width TPWM_MIN 3.00 Note 1 200 mV 80 ns 3.75 4.50 kΩ 40 60 ns PWM Active Tri-Level (ATL) Mode (Figure 7) PWM Input High Threshold VATL_HIGH 0.8 1.0 1.2 V PWM Input High Threshold VATL_LOW 0.65 0.8 0.95 V PWM Tri-Level High Voltage VATL_TRI_HIGH 2.1 2.5 2.9 V PWM Tri-Level Low Voltage VATL_TRI_LOW 2.00 2.30 2.42 V PWM Input Current Low VPWM = 0V -1.0 -1.5 mA PWM Input Current High VPWM = 1.8V -1.0 -1.5 mA Enable Input – EN Input Voltage High VN_H Input Voltage Low VEN_L Input Current IEN 6 September 10, 2012 | FINAL DATASHEET 2.0 V(EN) = 5.5V V 0.1 0.8 V 1 µA 45A Integrated PowIRstage® PARAMETER SYMBOL CONDITIONS MIN IR3558 TYP MAX UNIT Thermal Warning - OTSET Input and OT# Output Over Temperature High Threshold OT ROTSET = open, Note 1 150 °C Programmable Over Temperature High Threshold OT ROTSET = 100kΩ, Note 1 125 °C Over Temperature Hysteresis OTHYS Note 1 -20 °C 1.5 mA OT# Sink Current 1.0 OT# Output Low Voltage 1.5mA 0.4 1.0 V 0.65 0.80 0.95 mV Bootstrap Diode Forward Voltage BDFV I(BOOST) = 30mA, LVCC = 6.8V VCC Under Voltage Lockout Start Threshold VVCC_START 3.5 3.8 4.1 V Stop Threshold VVCC_STOP 3.2 3.5 3.8 V Hysteresis VVCC_HYS 0.15 0.30 0.45 V General VCC Supply Quiescent Current IVCC V(VCC) = 5V, V(EN) =0V 1.5 2.5 mA VCC Supply Current IVCC_SW V(VCC) = 5V, V(EN) =5V 2.7 3.5 mA LVCC Supply Quiescent Current ILVCC V(LVCC) = 5V, V(EN) =0V 15 25 uA V(LVCC) = 7V, V(EN) =0V 20 30 uA V(LVCC) = 5V, V(EN) =5V, fsw=400kHz 10 20 mA V(LVCC) = 7V, V(EN) =5V, fsw=400kHz 15 25 mA V(HVCC) = 5V, V(EN) =0V 15 25 uA V(HVCC) = 7V, V(EN) =0V 20 30 uA V(HVCC) =5V, V(EN) =5V, fsw=400kHz 5 10 mA V(HVCC) =7V, V(EN) =5V, fsw=400kHz 6.5 15 mA 1 µA LVCC Supply Current HVCC Supply Quiescent Current HVCC Supply Current VIN Supply Leakage Current ILVCC_SW IBOOST IBOOST_SW IVIN VIN = 20V, 125°C, V(PWM) = Tri-State Notes 1. Guaranteed by design but not tested in production 2. VIN=12V, VOUT=1.2V, ƒSW = 300kHz, L=210nH (0.2mΩ), HVCC=LVCC=6.8V, CIN=47uF x 4, COUT =470uF x3, 400LFM airflow, no heat sink, 25°C ambient temperature, and 8-layer PCB of 3.7” (L) x 2.6” (W). PWM controller loss and inductor loss are not included. 3. VIN=12V, VOUT=1.2V, ƒSW = 400kHz, L=150nH (0.29mΩ), HVCC=LVCC=7V, CIN=47uF x 4, COUT =470uF x3, no airflow, no heat sink, 25°C ambient temperature, and 8-layer PCB of 3.7” (L) x 2.6” (W). PWM controller loss and inductor loss are not included. 7 September 10, 2012 | FINAL DATASHEET 45A Integrated PowIRstage® IR3558 TIMING DIAGRAMS Normal PWM Normal PWM VPWM_HIGH VPWM_TRI PWM Tri-state Tri-state VPWM_LOW SW GATEL Figure 6: IR3558 Switching Waveforms in 3.3V Tri-state PWM Mode ATL Tri-state Normal PWM VATL_TRI_HIGH VATL_TRI_LOW ATL Tri-state Normal PWM VATL_HIGH VATL_LOW PWM SW GATEL Figure 7: IR3558 Switching Waveforms in International Rectifier’s Active Tri-Level® (ATL) PWM Mode 8 September 10, 2012 | FINAL DATASHEET 45A Integrated PowIRstage® IR3558 TYPICAL OPERATING CHARACTERISTICS Circuit of Figure 32, VIN=12V, VOUT=1.2V, ƒSW=400kHz, L=150nH (0.29mΩ), VCC=5V, HVCC=LVCC=7V, TAMB=25°C, no heat sink, no air flow, 8-layer PCB board of 3.7” (L) x 2.6” (W), no PWM controller loss, no inductor loss, unless specified otherwise. 94 1.15 3.3 1.10 2.2 1.05 1.1 1.00 0.0 0.95 -1.1 0.90 -2.2 92 91 Normalized Power Loss Efficiency (%) 90 89 88 87 86 85 84 83 82 Case Temperature Adjustment (°C) 93 81 80 0.85 10 15 20 25 30 35 -3.3 40 5 6 7 8 9 Output Current (A) 12 13 14 15 Figure 11: Normalized Power Loss vs. Input Voltage 10 1.40 8.8 9 1.35 7.7 1.30 6.6 1.25 5.5 1.20 4.4 1.15 3.3 1.10 2.2 1.05 1.1 1.00 0.0 0.95 -1.1 0.90 -2.2 1 0.85 -3.3 0 0.80 8 Normalized Power Loss 7 Power Loss (W) 11 Input Voltage (V) Figure 8: Typical IR3558 Efficiency 6 5 4 3 2 0 5 10 15 20 25 30 35 40 -4.4 0.8 0.9 1 1.1 Output Current (A) 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 Output Voltage (V) Figure 9: Typical IR3558 Power Loss Figure 12: Normalized Power Loss vs. Output Voltage 50 1.45 9.9 45 1.40 8.8 1.35 7.7 1.30 6.6 1.25 5.5 1.20 4.4 1.15 3.3 1.10 2.2 1.05 1.1 1.00 0.0 0.95 -1.1 0.90 -2.2 40 35 Normalized Power Loss Output Current (A) 10 30 25 20 400LFM 15 200LFM 10 100LFM 0LFM 5 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) Figure 10: Safe Operating Area, TCASE