DataSheeT - enpirion(R) power solutions EP5358xUI 600mA PowerSoC Step-Down DC-DC Switching Converter with Integrated Inductor DESCRIPTION FEATURES The EP5358xUI (x = L or H) is rated for up to 600mA of continuous output current. The EP5358xUI integrates MOSFET switches, control, compensation, and the magnetics in an advanced 2.5mm x 2.25mm micro-QFN Package. * Integrated Inductor Technology * -40C to +85C Ambient Temperature Range * 2.5mm x 2.25mm x 1.1mm uQFN Package * Total Solution Footprint 14mm2 Integrated magnetics enables a tiny solution footprint, low output ripple, low part-count, and high reliability, while maintaining high efficiency. The complete solution can be implemented in as little as 14mm2. * Low VOUT Ripple for RF Compatibility * High Efficiency, Up to 93% * Up to 600mA Continuous Output Current * 5 MHz Switching Frequency * 3 pin VID for Glitch Free Voltage Scaling * VOUT Range 0.6V to VIN - 0.25V * Short Circuit and Over Current Protection * UVLO and Thermal Protection * IC Level Reliability in a PowerSOC Solution The EP5358xUI uses a 3-pin VID to easily select the output voltage setting. Output voltage settings are available in 2 optimized ranges providing coverage for typical VOUT settings. The VID pins can be changed on the fly for fast dynamic voltage scaling. EP5358LUI further has the option to use an external voltage divider. The EP5358xUI is a perfect solution for noise sensitive and space constrained applications that require high efficiency. EP5358xUI Wireless and RF Applications * Wireless Broad Band Data Cards * Small Form Factor Optical Modules * Low Noise FPGA IO and Transceivers * Advanced Low Power Processors, DSP, IO, Memory, Video, Multimedia Engines VOUT AVIN ENABLE VSENSE VS0 VFB VS1 VS2 PGND AGND EFFICIENCY (%) 4.7F 0603 X7R * VOUT VIN PVIN APPLICATIONS 10F 0805 X7R Do not float Efficiency vs. IOUT (VIN = 5.0V) 95 90 85 80 75 70 65 60 55 50 45 40 35 14mm2 CONDITIONS VIN = 5V 0 100 200 VOUT = 3.3V 300 400 500 600 OUTPUT CURRENT (mA) Figure 1: Simplified Applications Circuit Figure 2: Highest Efficiency in Smallest Solution Size Page 1 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI ORDERING INFORMATION Part Number Package Markings TJ Rating Package Description EP5358LUI AKXX -40 to +125 16-pin (2.5mm x 2.25mm x 1.1mm) uQFN EP5358HUI ANXX -40 to +125 16-pin (2.5mm x 2.25mm x 1.1mm) uQFN EVB-EP5358xUI QFN Evaluation Board Packing and Marking Information: www.altera.com/support/reliability/packing/rel-packing-and-marking.html 13 AVIN PGND PGND 3 12 ENABLE VFB 4 11 VSENSE 5 AGND 6 7 8 NC(SW) 2 PGND VOUT 1 VOUT NC(SW) 16 15 14 PVIN 2 13 AVIN PGND 3 12 ENABLE VS0 NC 4 11 VS0 10 VS1 VSENSE 5 10 VS1 9 VS2 AGND 9 VS2 Figure 3: EP5358LUI Pin Out Diagram (Top View) 6 7 8 VOUT 15 PVIN 1 NC(SW) NC(SW) 16 14 NC(SW) VOUT NC(SW) PIN FUNCTIONS Figure 4. EP5358HUI Pin Out Diagram (Top View) NOTE A: NC pins are not to be electrically connected to each other or to any external signal, ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage. NOTE B: White `dot' on top left is pin 1 indicator on top of the device package. Page 2 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI PIN DESCRIPTIONS PIN NAME TYPE FUNCTION Analog NO CONNECT - These pins are internally connected to the common switching node of the internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal, ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage to the device. Ground Power ground. Connect these pins together and to the ground electrode of the Input and output filter capacitors. Analog EP5358LUI: Feedback pin for external divider option. EP5358HUI: No Connect Ground Sense pin for preset output voltages. Refer to application section for proper configuration. Analog Analog ground. This is the quiet ground for the internal control circuitry, and the ground return for external feedback voltage divider. Power Regulated Output Voltage. Refer to application section for proper layout and decoupling. Analog Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11. EP5358LUI: Selects one of seven preset output voltages or an external resistor divider. EP5358HUI: Selects one of eight preset output voltages. (Refer to section on output voltage select for more details.) Do not float. 1, 15, NC(SW) 16 2,3 PGND 4 VFB/NC 5 VSENSE 6 AGND 7, 8 VOUT 9, 10, VS2, VS1, 11 VS0 12 ENABLE Analog Output Enable. Enable = logic high; Disable = logic low 13 AVIN Power Input power supply for the controller circuitry. 14 PVIN Power Input Voltage for the MOSFET switches. Page 3 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI ABSOLUTE MAXIMUM RATINGS CAUTION: Absolute Maximum ratings are stress ratings only. Functional operation beyond the recommended operating conditions is not implied. Stress beyond the absolute maximum ratings may impair device life. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. Absolute Maximum Pin Ratings PARAMETER SYMBOL MIN MAX UNITS Input Supply Voltage VIN -0.3 6.0 V Voltages on: ENABLE, VSENSE, VSO - VS2 -0.3 VIN+ 0.3 V Voltages on: VFB (EP5358LUI) -0.3 2.7 V MAX UNITS +150 C +150 C +260 C MAX UNITS Absolute Maximum Thermal Ratings PARAMETER CONDITION MIN Maximum Operating Junction Temperature TJ-ABS Storage Temperature Range TSTG Reflow Peak Body Temperature -65 (10 Sec) MSL3 JEDEC J-STD-020A Absolute Maximum ESD Ratings PARAMETER CONDITION MIN HBM (Human Body Model) 2000 V CDM (Charged Device Model) 500 V RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN MAX UNITS Input Voltage Range VIN 2.4 5.5 V Operating Ambient Temperature TA -40 +85 C Operating Junction Temperature TJ -40 +125 C THERMAL CHARACTERISTICS PARAMETER SYMBOL TYPICAL UNITS Thermal Shutdown TSD 155 C Thermal Shutdown Hysteresis TSDHYS 25 C Thermal Resistance: Junction to Ambient (0 LFM) (1) JA 85 C/W (1) Based on a four layer copper board and proper thermal design per JEDEC EIJ/JESD51 standards. Page 4 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI ELECTRICAL CHARACTERISTICS NOTE: VIN=3.6V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted. Typical values are at TA = 25C. PARAMETER SYMBOL TEST CONDITIONS Operating Input Voltage VIN Range MIN TYP 2.4 MAX UNITS 5.5 V Under Voltage Lock-out VUVLO_R - VIN Rising 1.915 2.0 2.195 V Under Voltage Lock-out VUVLO_F - VIN Falling 1.815 1.9 2.095 V 350 500 m VIN-VDO 3.3 V Drop Out Resistance RDO Input to Output Resistance in 100% duty cycle operation. Output Voltage Range VOUT EP5358LUI (VDO = ILOAD X RDO) EP5358HUI Dynamic Voltage Slew VSLEW Rate (VID Change) 0.6 1.8 EP5358LUI EP5358HUI 4 8 V/ms TA = 25C, VIN = 3.6V; VID Preset VOUT Initial VOUT Accuracy ILOAD = 100mA ; -2 +2 % 0.8V VOUT 3.3V Line Regulation VOUT_LINE Load Regulation VOUT_LOAD Temperature Variation VOUT_TEMP L Output Current Range IOUT Shut-down Current ISD OCP Threshold ILIM 2.4V VIN 5.5V; ILOAD = 0A 0A ILOAD 600mA; VIN = 3.6V -40C TA +85C 0.03 %/V 0.48 %/A 24 ppm/ C 0 Enable = Low 2.4V VIN 5.5V 0.6V VOUT 3.3V 600 mA 0.75 A 1.25 1.4 A 0.588 0.6 TA = 25C, VIN = 3.6V; Feedback Pin Voltage VFB Initial Accuracy ILOAD = 100mA ; 0.612 V 0.8V VOUT 3.3V Page 5 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI PARAMETER Feedback Current (2) Pin SYMBOL Input VS0-VS2, Pin Logic Low TEST CONDITIONS MIN IFB TYP MAX <100 UNITS nA VVSLO 0.0 0.3 V VS0-VS2, Pin Logic High VVSHI 1.4 VIN V VS0-VS2, Current (2) Pin Input IVSX Enable Pin Logic Low VENLO Enable Pin Logic High VENHI Enable Pin Current (2) IENABLE Operating Frequency FOSC Soft Start Slew Rate VSS VOUT Rise Time TRISE <100 nA 0.3 1.4 V V <100 nA 5 MHz EP5358LUI (VID MODE) 2.6 4 5.4 EP5358HUI (VID MODE) 5.2 8 10.8 EP5358LUI VFB MODE 146 225 304 V/ms s (2) Parameter guaranteed by design and characterization. Page 6 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI TYPICAL PERFORMANCE CURVES EFFICIENCY (%) EFFICIENCY (%) Efficiency vs. IOUT (VIN = 3.3V) Efficiency vs. IOUT (VIN = 5.0V) 95 90 85 80 75 70 65 60 55 50 45 40 35 VOUT = 3.3V VOUT = 2.5V VOUT = 1.8V VOUT = 1.5V CONDITIONS VIN = 5V 0 100 200 VOUT = 1.2V VOUT = 1.0V 300 400 500 100 95 90 85 80 75 70 65 60 55 50 45 40 35 600 VOUT = 2.5V VOUT = 1.8V VOUT = 1.5V 0 100 OUTPUT CURRENT (mA) Output Voltage vs. Output Current 300 400 500 600 Output Voltage vs. Output Current 1.220 OUTPUT VOLTAGE (V) VIN = 5.0V 1.015 OUTPUT VOLTAGE (V) 200 VOUT = 1.0V OUTPUT CURRENT (mA) 1.020 VIN = 3.3V 1.010 1.005 1.000 0.995 0.990 CONDITIONS VOUT = 1.0V 0.985 1.215 VIN = 5.0V 1.210 VIN = 3.3V 1.205 1.200 1.195 1.190 CONDITIONS VOUT = 1.2V 1.185 1.180 0.980 0 100 200 300 400 500 600 0 100 OUTPUT CURRENT (mA) 200 300 400 500 600 OUTPUT CURRENT (mA) Output Voltage vs. Output Current Output Voltage vs. Output Current 1.820 1.515 VIN = 5.0V 1.510 VIN = 3.3V OUTPUT VOLTAGE (V) 1.520 OUTPUT VOLTAGE (V) VOUT = 1.2V CONDITIONS CONDITIONS 5V VVININ == 3.3V 1.505 1.500 1.495 1.490 CONDITIONS VOUT = 1.5V 1.485 1.480 0 100 200 300 400 500 1.815 VIN = 5.0V 1.810 VIN = 3.3V 1.805 1.800 1.795 1.790 CONDITIONS VOUT = 1.8V 1.785 1.780 600 0 100 200 300 400 500 600 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) Page 7 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI TYPICAL PERFORMANCE CURVES (CONTINUED) Output Voltage vs. Output Current Output Voltage vs. Output Current 3.320 2.515 VIN = 5.0V 2.510 VIN = 3.3V OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.520 2.505 2.500 2.495 2.490 CONDITIONS VOUT = 2.5V 2.485 2.480 0 100 200 300 400 500 3.315 VIN = 5.0V 3.310 3.305 3.300 3.295 3.290 CONDITIONS VOUT = 3.3V 3.285 3.280 0 600 100 1.220 1.015 1.215 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.020 1.010 1.005 1.000 0.995 LOAD = 600mA 0.985 LOAD = 0A 0.980 2.5 3 3.5 CONDITIONS VOUT_NOM = 1.0V 4 4.5 1.195 1.190 LOAD = 600mA 1.185 LOAD = 0A 1.180 2.5 5 3 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.815 1.510 1.505 1.500 1.495 2.5 3 3.5 CONDITIONS VOUT_NOM = 1.5V 4 4 4.5 5 Output Voltage vs. Input Voltage 1.515 1.480 3.5 CONDITIONS VOUT_NOM = 1.2V INPUT VOLTAGE (V) 1.820 LOAD = 0A 600 1.200 1.520 1.485 500 1.205 Output Voltage vs. Input Voltage LOAD = 600mA 400 1.210 INPUT VOLTAGE (V) 1.490 300 Output Voltage vs. Input Voltage Output Voltage vs. Input Voltage 0.990 200 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 4.5 1.810 1.805 1.800 1.795 1.790 CONDITIONS VOUT_NOM = 1.8V LOAD = 600mA 1.785 LOAD = 0A 1.780 5 INPUT VOLTAGE (V) 2.5 3 3.5 4 4.5 5 INPUT VOLTAGE (V) Page 8 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI TYPICAL PERFORMANCE CURVES (CONTINUED) Output Voltage vs. Input Voltage Output Voltage vs. Input Voltage 2.515 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.520 2.510 2.505 2.500 2.495 2.490 LOAD = 600mA 2.485 LOAD = 0A CONDITIONS VOUT_NOM = 2.5V 2.480 3 3.5 4 4.5 3.400 3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 LOAD = 600mA LOAD = 0A 5 5 5.1 Output Voltage vs. Temperature LOAD = 600mA OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.020 LOAD = 0A 1.010 1.000 0.990 0.980 5.5 CONDITIONS VIN = 5.0V VOUT_NOM = 1.0V 1.020 LOAD = 600mA LOAD = 0A 1.010 1.000 0.990 0.980 1.840 -15 10 35 1.820 85 -40 -15 10 35 60 AMBIENT TEMPERATURE (C) AMBIENT TEMPERATURE (C) Output Voltage vs. Temperature Output Voltage vs. Temperature 1.840 CONDITIONS VIN = 3.3V VOUT_NOM = 1.8V 1.830 60 LOAD = 600mA OUTPUT VOLTAGE (V) -40 OUTPUT VOLTAGE (V) 5.4 Output Voltage vs. Temperature 1.030 CONDITIONS VIN = 3.3V VOUT_NOM = 1.0V 5.3 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1.030 5.2 CONDITIONS VOUT_NOM = 3.3V LOAD = 0A 1.810 1.800 1.790 1.780 CONDITIONS VIN = 5.0V VOUT_NOM = 1.8V 1.830 1.820 85 LOAD = 600mA LOAD = 0A 1.810 1.800 1.790 1.780 -40 -15 10 35 60 85 -40 -15 10 35 60 85 AMBIENT TEMPERATURE (C) AMBIENT TEMPERATURE (C) Page 9 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI No De-rating (VIN = 5V) No De-rating (VIN = 3.3V) 1.0 MAXIMUM OUTPUT CURRENT (A) MAXIMUM OUTPUT CURRENT (A) TYPICAL PERFORMANCE CURVES (CONTINUED) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 CONDITIONS VIN = 3.3V TJMAX = 125C JA = 85C/W No Air Flow VOUT = 1.8V 0.2 VOUT = 2.5V 0.1 0.0 55 60 65 70 75 80 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 CONDITIONS VIN = 5.0V TJMAX = 125C JA = 85C/W No Air Flow VOUT = 2.5V 0.2 VOUT = 3.3V 0.1 0.0 85 AMBIENT TEMPERATURE (C) 55 60 65 70 75 80 85 AMBIENT TEMPERATURE (C) Page 10 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI TYPICAL PERFORMANCE CHARACTERISTICS Output Ripple at 20MHz Bandwidth Output Ripple at 20MHz Bandwidth CONDITIONS VIN = 5V VOUT = 1.2V IOUT = 500mA CONDITIONS VIN = 5V VOUT = 3.3V IOUT = 500mA VOUT (AC Coupled) VOUT (AC Coupled) Output Ripple at 20MHz Bandwidth VOUT (AC Coupled) CONDITIONS VIN = 3.3V VOUT = 1.8V IOUT = 500mA Output Ripple at 20MHz Bandwidth VOUT (AC Coupled) Enable Power Up Enable Power Up ENABLE VOUT CONDITIONS VIN = 3.3V VOUT = 1.2V IOUT = 500mA ENABLE CONDITIONS VIN = 5V VOUT = 3.3V (VID Mode) IOUT = 10mA VOUT CONDITIONS VIN = 5V VOUT = 3.3V (VID Mode) IOUT = 10mA Page 11 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) Enable Power Up Enable Power Down ENABLE ENABLE CONDITIONS VIN = 5V VOUT = 3.3V (VID Mode) IOUT = 500mA VOUT VOUT CONDITIONS VIN = 5V VOUT = 3.3V (VID Mode) IOUT = 500mA Load Transient from 0 to 500mA Load Transient from 0 to 500mA CONDITIONS VIN = 5V VOUT = 1.2V CONDITIONS VIN = 3.3V VOUT = 1.8V VOUT (AC Coupled) VOUT (AC Coupled) LOAD LOAD Page 12 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI FUNCTIONAL BLOCK DIAGRAM PVIN UVLO Thermal Limit Current Limit ENABLE NC(SW) Soft Start P-Drive (-) Logic VOUT PWM Comp (+) N-Drive PGND VSENSE Sawtooth Generator Compensation Network (-) Switch VFB Error Amp (+) DAC VREF Voltage Select Package Boundry AVIN AGND VS0 VS1 VS2 Figure 5: Functional Block Diagram Page 13 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI FUNCTIONAL DESCRIPTION Functional Overview The EP5358xUI requires only 2 small MLCC capacitors for a complete DC-DC converter solution. The device integrates MOSFET switches, PWM controller, Gate-drive, compensation, and inductor into a tiny 2.5mm x 2.25mm x 1.1mm micro-QFN package. Advanced package design, along with the high level of integration, provides very low output ripple and noise. The EP5358xUI uses voltage mode control for high noise immunity and load matching to advanced 90nm loads. A 3-pin VID allows the user to choose from one of 8 output voltage settings. The EP5358xUI comes with two VID output voltage ranges. The EP5358HUI provides V OUT settings from 1.8V to 3.3V, the EP5358LUI provides VID settings from 0.8V to 1.5V, and also has an external resistor divider option to program output setting over the 0.6V to V IN-0.25V range. The EP5358xUI provides the industry's highest power density of any 600mA DC-DC converter solution. The key enabler of this revolutionary integration is Altera's proprietary power MOSFET technology. The advanced MOSFET switches are implemented in deep-submicron CMOS to supply very low switching loss at high switching frequencies and to allow a high level of integration. The semiconductor process allows seemless integration of all switching, control, and compensation circuitry. The proprietary magnetics design provides high-density/high-value magnetics in a very small footprint. Altera Enpirion magnetics are carefully matched to the control and compensation circuitry yielding an optimal solution with assured performance over the entire operating range. Protection features include under-voltage lock-out (UVLO), over-current protection (OCP), short circuit protection, and thermal overload protection Integrated Inductor: Low-Noise Low-EMI The EP5358xUI utilizes a proprietary low loss integrated inductor. The integration of the inductor greatly simplifies the power supply design process. The inherent shielding and compact construction of the integrated inductor reduces the conducted and radiated noise that can couple into the traces of the printed circuit board. Further, the package layout is optimized to reduce the electrical path length for the high di/dT input AC ripple currents that are a major source of radiated emissions from DC-DC converters. The integrated inductor provides the optimal solution to the complexity, output ripple, and noise that plague low power DC-DC converter design. Control Matched to sub 90nm Loads The EP5358xUI utilizes an integrated type III compensation network. Voltage mode control is inherently impedance matched to the sub 90nm process technology that is used in today's advanced ICs. Voltage mode control also provides a high degree of noise immunity at light load currents so that low ripple and high accuracy are maintained over the entire load range. The very high switching frequency allows for a very wide control loop bandwidth and hence excellent transient performance. Soft Start nternal soft start circuits limit in-rush current when the device starts up from a power down condition or when the "ENABLE" pin is asserted "high". Digital control circuitry limits the V OUT ramp rate to levels that are safe for the Power MOSFETS and the integrated inductor. The EP5358HUI has a soft-start slew rate that is twice that of the EP5358LUI. Page 14 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI When the EP5358LUI is configured in external resistor divider mode, the device has a fixed VOUT ramp time. Therefore, the ramp rate will vary with the output voltage setting. Output voltage ramp time is given in the Electrical Characteristics Table. Excess bulk capacitance on the output of the device can cause an over-current condition at startup. Maximum allowable output capacitance depends on the device's minimum current limit, the output current at startup, the minimum soft-start time and the output voltage (all are listed in the Electrical Characteristics Table). The total maximum capacitance on the output rail is estimated by the equation below: COUT_MAX = (ILIMIT - IOUT) * tSS / VOUT COUT_MAX = maximum allowable output capacitance ILIMIT = DC current limit with margin = 0.8A IOUT = output current at startup VOUT = output voltage tSS(VFB) = min soft-start time = 0.146ms External feedback setting tSS(VID_HUI) = VOUT [V] / 10.8 [V/ms] "H" VID setting tSS(VID_LUI) = VOUT [V] / 5.4 [V/ms] "L" VID setting The soft-start time in VID setting is different than External Feedback (VFB) setting, so be sure to use the correct value when calculating the maximum allowable output capacitance. NOTE: Do not use excessive output capacitance since it may affect device stability. The EP5358xUI has high loop bandwidth and 60F is all that is needed for transient response optimization. Over Current/Short Circuit Protection The current limit function is achieved by sensing the current flowing through a sense P-MOSFET which is compared to a reference current. When this level is exceeded the P-FET is turned off and the N-FET is turned on, pulling VOUT low. This condition is maintained for approximately 0.5mS and then a normal soft start is initiated. If the over current condition still persists, this cycle will repeat. Thermal Protection The thermal shutdown circuit disables the device operation (switching stops) when the junction temperature exceeds 160C. When the junction temperature drops by approximately 25C, the converter will re-start with a normal soft-start. By preventing operation at excessive temperatures, the thermal shutdown circuit will protect the device from overstress. Under Voltage Lockout During initial power up an under voltage lockout circuit will hold-off the switching circuitry until the input voltage reaches a sufficient level to insure proper operation. If the voltage drops below the UVLO threshold the lockout circuitry will again disable the switching. Hysteresis is included to prevent chattering between states. Page 15 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI Enable The ENABLE pin provides a means to shut down the converter or enable normal operation. A logic low will disable the converter and cause it to shut down. A logic high will enable the converter into normal operation. NOTE: The ENABLE pin must not be left floating. Thermal Shutdown When excessive power is dissipated in the chip, the junction temperature rises. Once the junction temperature exceeds the thermal shutdown temperature the thermal shutdown circuit turns off the converter output voltage thus allowing the device to cool. When the junction temperature decreases by 15C, the device will go through the normal startup process. Page 16 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI APPLICATION INFORMATION EP5358HUI VOUT VIN PVIN 4.7F 0603 X7R EP5358LUI VIN PVIN VOUT AVIN ENABLE VSENSE VS0 VS1 VS2 PGND AGND 10F 0805 X7R 4.7F 0603 X7R VOUT VOUT AVIN ENABLE VSENSE VS0 VFB VS1 VS2 PGNDAGND 10F 0805 X7R Do not float Do not float Figure 6. EP5358HUI Application Circuit Figure 7. EP5358LUI Application Circuit Output Voltage Programming The EP5358xUI utilizes a 3-pin VID to program the output voltage value. The VID is available in two sets of output VID programming ranges. The VID pins should be connected either to AVIN or to AGND to avoid noise coupling into the device. The "Low" range is optimized for low voltage applications. It comes with preset VID settings ranging from 0.80V and 1.5V. This VID set also has an external divider option. To specify this VID range, order part number EP5358LUI. The "High" VID set provides output voltage settings ranging from 1.8V to 3.3V. This version does not have an external divider option. To specify this VID range, order part number EP5358HUI. Internally, the output of the VID multiplexer sets the value for the voltage reference DAC, which in turn is connected to the non-inverting input of the error amplifier. This allows the use of a single feedback divider with constant loop gain and optimum compensation, independent of the output voltage selected. NOTE: The VID pins must not be left floating. EP5358L Low VID Range Programming The EP5358LUI is designed to provide a high degree of flexibility in powering applications that require low VOUT settings and dynamic voltage scaling (DVS). The device employs a 3-pin VID architecture that allows the user to choose one of seven (7) preset output voltage settings, or the user can select an external voltage divider option. The VID pin settings can be changed on the fly to implement glitch-free voltage scaling. Page 17 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI Table 1: EP5358LUI VID Voltage Select Settings VS2 VS1 VS0 VOUT 0 0 0 1.50V 0 0 1 1.45V 0 1 0 1.20V 0 1 1 1.15V 1 0 0 1.10V 1 0 1 1.05 1 1 0 0.80V 1 1 1 EXT Table 1 shows the VS2-VS0 pin logic states for the EP5358LUI and the associated output voltage levels. A logic "1" indicates a connection to AVIN or to a "high" logic voltage level. A logic "0" indicates a connection to AGND or to a "low" logic voltage level. These pins can be either hardwired to AVIN or AGND or alternatively can be driven by standard logic levels. Logic levels are defined in the electrical characteristics table. Any level between the logic high and logic low is indeterminate. EP5358LUI External Voltage Divider The external divider option is chosen by connecting VID pins VS2-VS0 to VIN or a logic "1" or "high". The EP5358LUI uses a separate feedback pin, VFB, when using the external divider. VSENSE must be connected to VOUT as indicated in Figure 8. The output voltage is selected by the following formula: VOUT 0.6V 1 Ra Rb Ra must be chosen as 237K to maintain loop gain. Then Rb is given as: Rb 142 .2 x10 3 VOUT 0.6 VOUT can be programmed over the range of 0.6V to (VIN - 0.25V). NOTE: Dynamic Voltage Scaling is not allowed between internal preset voltages and external divider. Page 18 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI EP5358LUI VOUT VIN PVIN 4.7F 0603 X7R VOUT AVIN VS0 VSENSE VS1 VFB VS2 ENABLE PGND AGND RA 10F 0805 X7R RB Figure 8. EP5358LUI Using External Divider EP5358HUI High VID Range Programming The EP5358HUI VOUT settings are optimized for higher nominal voltages such as those required to power IO, RF, or IC memory. The preset voltages range from 1.8V to 3.3V. There are eight (8) preset output voltage settings. The EP5358HUI does not have an external divider option. As with the EP5358LUI, the VID pin settings can be changed while the device is enabled. Table 2 shows the VS0-VS2 pin logic states for the EP5358HUI and the associated output voltage levels. A logic "1" indicates a connection to AVIN or to a "high" logic voltage level. A logic "0" indicates a connection to AGND or to a "low" logic voltage level. These pins can be either hardwired to AVIN or AGND or alternatively can be driven by standard logic levels. Logic levels are defined in the electrical characteristics table. Any level between the logic high and logic low is indeterminate. These pins must not be left floating. Table 2: EP5358HUI VID Voltage Select Settings VS2 VS1 VS0 VOUT 0 0 0 3.30V 0 0 1 3.00V 0 1 0 2.90V 0 1 1 2.60V 1 0 0 2.50V 1 0 1 2.20V 1 1 0 2.10V 1 1 1 1.80V Page 19 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI Custom VID Setting Adjustment EP5358xUI VOUT VIN PVIN VOUT AVIN ENABLE VSENSE VS0 VS1 VFB VS2 PGND AGND 4.7F 0603 X7R 5pF RS 10F 0805 X7R Do not float Figure 9: EP5358xUI with RC inserted in VSENSE path to modify VID output voltages. It is possible to adjust VOUT for a given VID setting by inserting a parallel RC combination in the VSENSE path as shown in figure 9. The capacitor value is 5.0pF to ensure stability. Note that the value of VOUT can only be increased from its nominal setting (VOUTNEW>VOUTOLD): For EP5358LUI: VOUTNEW RsL 711 * 1 kOhms VOUTOLD For EP5358HUI: VOUTNEW RsH 356 * 1 kOhms VOUTOLD VOUTNEW is the desired "new" VOUT. VOUTOLD is the VID table output voltage. For a given Rs Value, the VOUTNEW for VID settings is determined by the following equations: EP5358LUI: Rs VOUTNEW VOUTOLD L 1Volts 711 EP5358HUI: Rs VOUTNEW VOUTOLD H 1Volts 356 NOTE: The amount of adjustment is limited to approximately 15% of the nominal VID setting. NOTE: Adjusting VOUT using this method will increase the tolerance of the output voltage. The larger the adjustment, the greater the increase in tolerance. Page 20 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI Input Filter Capacitor The input capacitor requirement is a minimum of 4.7F 0603 X7R MLCC. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and with temperature, and are not suitable for switchmode DC-DC converter input filter applications. Output Filter Capacitor The output filter capacitor requirement is a minimum of 10F 0805 MLCC. Ripple performance can be improved by using 2x10F 0603 MLCC capacitors (for any allowed VIN). The maximum output filter capacitance next to the output pins of the device is 60F low ESR MLCC capacitance. VOUT has to be sensed at the last output filter capacitor next to the EP5358xUI. Additional bulk capacitance for decoupling and bypass can be placed at the load as long as there is sufficient separation between the VOUT Sense point and the bulk capacitance. Excess total capacitance on the output (Output Filter + Bulk) can cause an over-current condition at startup. Refer to the section on Soft-Start for the maximum total capacitance on the output. The output capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and temperature and are not suitable for switch-mode DCDC converter output filter applications. Power-Up/Down Sequencing During power-up, ENABLE should not be asserted before PVIN, and PVIN should not be asserted before AVIN. The PVIN should never be powered when AVIN is off. Durig power down, the AVIN should not be powered down before the PVIN. Tying PVIN and AVIN or all three pins (AVIN, PVIN, ENABLE) together during power up or power down meets these requirements. Pre-Bias Start-up The EP5358xUI supports startup into a pre-biased output of up to 1.5V. The output of the EP5358xUI can be pre-biased with a voltage up to 1.5V when it is first enabled. Page 21 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI THERMAL CONSIDERATIONS Thermal considerations are important power supply design facts that cannot be avoided in the real world. Whenever there are power losses in a system, the heat that is generated by the power dissipation needs to be accounted for. The Enpirion PowerSoC helps alleviate some of those concerns. The Enpirion EP5358xUI DCDC converter is packaged in a 2.5x2.25x1.1mm 16-pin QFN package. The recommended maximum junction temperature for continuous operation is 125C. Continuous operation above 125C may reduce long-term reliability. The device has a thermal overload protection circuit designed to turn off the device at an approximate junction temperature value of 155C. The following example and calculations illustrate the thermal performance of the EP5358xUI. Example: VIN = 5V VOUT = 3.3V IOUT = 600mA First calculate the output power. POUT = 3.3V x 600mA = 1.98W EFFICIENCY (%) Next, determine the input power based on the efficiency () shown in Figure 10. Efficiency vs. IOUT (VIN = 5.0V) 95 90 85 80 75 70 65 60 55 50 45 40 35 91% CONDITIONS VIN = 5V 0 100 200 VOUT = 3.3V 300 400 500 600 OUTPUT CURRENT (mA) Figure 10: Efficiency vs. Output Current For VIN = 5V, VOUT = 3.3V at 600mA, 91% = POUT / PIN = 91% = 0.91 PIN = POUT / PIN 1.98W / 0.91 2.18W Page 22 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI The power dissipation (PD) is the power loss in the system and can be calculated by subtracting the output power from the input power. PD = PIN - POUT 2.18W - 1.98W 0.2W With the power dissipation known, the temperature rise in the device may be estimated based on the theta JA value (JA). The JA parameter estimates how much the temperature will rise in the device for every watt of power dissipation. The EP5358xUI has a JA value of 85C/W without airflow. Determine the change in temperature (T) based on PD and JA. T = PD x JA T 0.2W x 85C/W 17C The junction temperature (TJ) of the device is approximately the ambient temperature (T A) plus the change in temperature. We assume the initial ambient temperature to be 25C. TJ = TA + T TJ 25C + 17C 42C The maximum operating junction temperature (TJMAX) of the device is 125C, so the device can operate at a higher ambient temperature. The maximum ambient temperature (TAMAX) allowed can be calculated. TAMAX = TJMAX - PD x JA 125C - 17C 108C The maximum ambient temperature (before de-rating) the device can reach is 84C given the input and output conditions. Note that the efficiency will be slightly lower at higher temperatures and this calculation is an estimate. Page 23 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI LAYOUT RECOMMENDATIONS Figure 11 shows critical components and layer 1 traces of a recommended minimum footprint EP5358LUI/EP5358HUI layout with ENABLE tied to VIN. Alternate ENABLE configurations, and other small signal pins need to be connected and routed according to specific customer application. Please see the Gerber files on the Altera website www.altera.com/powersoc for exact dimensions and other layers. Please refer to Figure 11 while reading the layout recommendations in this section. Figure 11. Top PCB Layer Critical Components and Copper for Minimum Footprint Recommendation 1: Input and output filter capacitors should be placed on the same side of the PCB, and as close to the EP5358xUI package as possible. They should be connected to the device with very short and wide traces. Do not use thermal reliefs or spokes when connecting the capacitor pads to the respective nodes. The +V and GND traces between the capacitors and the EP5358xUI should be as close to each other as possible so that the gap between the two nodes is minimized, even under the capacitors. Recommendation 2: Input and output grounds are separated until they connect at the PGND pins. The separation shown on Figure 11 between the input and output GND circuits helps minimize noise coupling between the converter input and output switching loops. Recommendation 3: The system ground plane should be the first layer immediately below the surface layer. This ground plane should be continuous and un-interrupted below the converter and the input/output capacitors. Recommendation 4: Multiple small vias should be used to connect the ground traces under the device to the system ground plane on another layer for heat dissipation. The drill diameter of the vias should be 0.33mm, and the vias must have at least 1 oz. copper plating on the inside wall, making the finished hole size around 0.20-0.26mm. Do not use thermal reliefs or spokes to connect the vias to the ground plane. It is preferred to put these vias under the capacitors along the edge of the GND copper closest to the +V copper. Please see Figure 11. These vias connect the input/output filter capacitors to the GND plane and help reduce parasitic inductances in the input and output current loops. If the vias cannot be placed under CIN and COUT, then put them just outside the capacitors along the GND. Do not use thermal reliefs or spokes to connect these vias to the ground plane. Recommendation 5: AVIN is the power supply for the internal small-signal control circuits. It should be connected to the input voltage at a quiet point. In Figure 11 this connection is made at the input capacitor close to the VIN connection. Page 24 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI RECOMMENDED PCB FOOTPRINT Figure 12: EP5358xUI PCB Footprint (Top View) Page 25 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI PACKAGE DIMENSIONS Figure 13: EP5358LUI Package Dimensions (Bottom View) Page 26 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI Figure 14: EP5358HUI Package Dimensions (Bottom View) Packing and Marking Information: https://www.altera.com/support/quality-and-reliability/packing.html Page 27 03541 October 13, 2018 Rev K Datasheet | Intel(R) Enpirion(R) Power Solutions: EP5358LUI/HUI REVISION HISTORY Rev Date Change(s) I Feb, 2018 Updated Derating Curves to show correct Theta JA value and illustration Updated Enable Power Down illustration to show actual image with 500mA of load current Updated Soft-start discussion and maximum output capacitance Updated Power Up Sequence recommendations Updated Pre-Bias Startup discussion Updated COUT_Max equation New Datasheet format J Sep, 2018 Updated Format K Sep, 2018 Corrected some Typos WHERE TO GET MORE INFORMATION For more information about Intel(R) and Enpirion(R) PowerSoCs, visit: www.altera.com/enpirion (c) 2017 Intel Corporation. All rights reserved. Intel, the Intel logo, Altera, ARRIA, CYCLONE, ENPIRION, MAX, MEGACORE, NIOS, QUARTUS, and STRATIX words and logos are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. Other marks and brands may be claimed as the property of others. Intel reserves the right to make changes to any products and services at any time without notice. Intel assumes no responsibility or liability arising out of the application or use of any information, product, or service described herein except as expressly agreed to in writing by Intel. Intel customers are advised to obtain the latest version of device specifications before relying on any published information and before placing orders for products or services. * Other marks and brands may be claimed as the property of others. Page 28 03541 October 13, 2018 Rev K