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Document overview
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- PDF pages: 21
Technical content
Features
- Integrated Inductor Technology
- - 40°C to +105°C Ambient Temperature Range
- AEC-Q100 Qualified for Automotive Applications
- 3mm x 3mm x 1.1mm QFN Package
- Total Solution Footprint ~ 27mm2
- Low VOUT Ripple for IO Compatibility
- High Efficiency, up to 94%
- V OUT Range 0.6V to VIN – 0.5V
- 1A Continuous Output Current
- 5 MHz Switching Frequency
- 3- pin VID for Glitch Free Voltage Scaling
- Short Circuit and Over Current Protection
- UVLO and Thermal Protection
- IC Level Reliability in a PowerSoC Solution
Applications
- Automotive Applications AEC-Q100 Requirement
- Portable Wireless and RF applications
- Wireless Broad Band Data Cards
- Solid State Storage Applications
- Noise and Space Sensitive Applications VOUTVIN 10µF 0805 X7R 4.7µF 0603 X7R VOUTPVIN AVIN PGND AGND VSENSE EP53A8xQA 100Ω VFB VS0 VS1 VS2 ENABLE
Figure 1. Simplified Applications Circuit Figure 2. Highest Efficiency in Smallest Solution Size
10366 July 21, 2015 Rev D
www.altera.com/enpirion, Page 2
Ordering Information
Part Number Package Markings TA (°C) Package Description EP53A8LQA BJXX -40 to +105 16-pin (3mm x 3mm x 1.1mm) QFN EP53A8HQA BMXX -40 to +105 16-pin (3mm x 3mm x 1.1mm) QFN EVB-EP53A8xQA QFN Evaluation Board Packing and Marking Information: www.altera.com/support/reliability/packing/rel-packing-and-marking.html Pin Assignments (Top View) Figure 3. EP53A8LQA Pin Out Diagram (Top View) Figure 4. EP53A8HQA 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. may result in part malfunction or damage to the device. 4 VFB EP53A8LQA: Feedback pin for external divider option. 5 VSENSE Sense pin for preset output voltages. Refer to application section for proper configuration. 7, 8 VOUT Regulated Output Voltage. Refer to application section for proper layout and decoupling.
www.altera.com/enpirion, Page 3 PIN NAME FUNCTION 9, 10, 11 VS2, VS1, VS0 Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11. EP53A8LQA: Selects one of seven preset output voltages or an external resistor divider. EP53A8HQA: Selects one of eight preset output voltages. (Refer to section on output voltage select for more details.) 12 ENABLE Output Enable. Enable = logic high; Disable = logic low 13 AVIN Input power supply for the controller circuitry. Connect to PVIN through a 100 Ohm resistor. 14 PVIN Input Voltage for the MOSFET switches. 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. 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 (EP53A8LQA) -0.3 2.7 V Maximum Operating Junction Temperature TJ-ABS 150 °C Storage Temperature Range TSTG -65 150 °C Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020C 260 °C ESD Rating (based on Human Body Mode) 2000 V Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS Input Voltage Range VIN 2.4 5.5 V Operating Ambient Temperature TA - 40 +105 °C Operating Junction Temperature TJ - 40 +125 °C Thermal Characteristics PARAMETER SYMBOL TYP UNITS Thermal Resistance: Junction to Ambient –0 LFM (Note 1) θJA 80 °C/W Thermal Overload Trip Point TJ-TP +155 °C Thermal Overload Trip Point Hysteresis 25 °C Note 1: Based on a four layer copper board and proper thermal design per JEDEC EIJ/JESD51 standards .
Electrical Characteristics
NOTE: VIN=3.6V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted. Typical values are at TA = 25°C. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Operating Input Voltage VIN 2.4 5.5 V Under Voltage Lock- out – VIN Rising VUVLO_R 2.0 V Under Voltage Lock- out – VIN Falling VUVLO_F 1.9 V
www.altera.com/enpirion, Page 4 PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Drop Out Resistance RDO Input to Output Resistance 350 500 mΩ Output Voltage Range VOUT EP53A8LQA (VDO = ILOAD X RDO) EP53A8HQA 0.6
1.8 VIN-VDO
3.3 V Dynamic Voltage Slew Rate VSLEW EP53A8HQA EP53A8LQA 8
4 V/ms
Accuracy ∆VOUT TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V -2 +2 % Feedback Pin Voltage Initial Accuracy V FB TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V .588 0.6 0.612 V Line Regulation ∆VOUT_LINE 2.4V ≤ VIN ≤ 5.5V; Load = 0A 0.03 %/V Load Regulation ∆VOUT_LOAD 0A ≤ ILOAD ≤ 1A; VIN = 3.6V 0.6 %/A Temperature Variation ∆VOUT_TEMP L -40°C ≤ TA ≤ +105°C 30 ppm/°C Output Current Range IOUT Subject to de-rating 0 1000 mA Shut-down Current ISD Enable = Low 0.75 µA OCP Threshold ILIM 2.4V ≤ VIN ≤ 5.5V 0.6V ≤ VOUT ≤ 3.3V 1.25 1.4 A VS0-VS2, Pin Logic Low VVSLO 0.0 0.3 V VS0-VS2, Pin Logic High VVSHI 1.4 VIN V VS0-VS2, Pin Input Current IVSX Note 1 <100 nA Enable Pin Logic Low VENLO 0.4 V Enable Pin Logic High VENHI 1.4 V Enable Pin Current IENABLE Note 1 <100 nA Feedback Pin Input Current IFB Note 1 <100 nA Operating Frequency FOSC 5 MHz Soft Start Operation Soft Start Slew Rate ∆VSS EP53A8HQA (VID only) EP53A8LQA (VID only) 8 Soft Start Rise Time ∆TSS EP53A8LQA (VFB mode); Note 2 170 225 280 µs Note 1: Parameter guaranteed by design and characterization. Note 2: Measured from when VIN ≥ VUVLO_R & ENABLE pin crosses its logic High threshold.
www.altera.com/enpirion, Page 5 Typical Performance Curves 100 EFFICIENCY (%) OUTPUT CURRENT (A) Efficiency vs. IOUT (VIN = 3.3V) VOUT = 2.5V VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V VOUT = 1.0V CONDITIONS VIN = 3.3V EFFICIENCY (%) OUTPUT CURRENT (A) Efficiency vs. IOUT (VIN = 5.0V) VOUT = 3.3V VOUT = 2.5V VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V VOUT = 1.0V CONDITIONS VIN = 5V 0.980 0.985 0.990 0.995 1.000 1.005 1.010 1.015 1.020 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V VIN = 3.3V CONDITIONS VOUT = 1.0V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V VIN = 3.3V CONDITIONS VOUT = 1.2V 1.480 1.485 1.490 1.495 1.500 1.505 1.510 1.515 1.520 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V VIN = 3.3V CONDITIONS VOUT = 1.5V 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V VIN = 3.3V CONDITIONS VOUT = 1.8V
www.altera.com/enpirion, Page 6 Typical Performance Curves (Continued) 2.480 2.485 2.490 2.495 2.500 2.505 2.510 2.515 2.520 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V VIN = 3.3V CONDITIONS VOUT = 2.5V 3.280 3.285 3.290 3.295 3.300 3.305 3.310 3.315 3.320 OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Output Voltage vs. Output Current VIN = 5.0V CONDITIONS VOUT = 3.3V 0.980 0.985 0.990 0.995 1.000 1.005 1.010 1.015 1.020 2.5 3 3.5 4 4.5 5 5.5 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 1.0V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 2.5 3 3.5 4 4.5 5 5.5 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 1.2V 1.480 1.485 1.490 1.495 1.500 1.505 1.510 1.515 1.520 2.5 3 3.5 4 4.5 5 5.5 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 1.5V 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 2.5 3 3.5 4 4.5 5 5.5 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 1.8V
www.altera.com/enpirion, Page 7 Typical Performance Curves (Continued) 2.480 2.485 2.490 2.495 2.500 2.505 2.510 2.515 2.520 3 3.5 4 4.5 5 5.5 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 2.5V 3.280 3.285 3.290 3.295 3.300 3.305 3.310 3.315 3.320 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Output Voltage vs. Input Voltage LOAD = 0A LOAD = 1A CONDITIONS VOUT_NOM = 3.3V 0.980 0.990 1.000 1.010 1.020 1.030 -50 -30 -10 10 30 50 70 90 110 OUTPUT VOLTAGE (V) AMBIENT TEMPERATURE (°C) Output Voltage vs. Temperature LOAD = 0A LOAD = 1A CONDITIONS VIN = 3.3V VOUT_NOM = 1.0V 0.980 0.990 1.000 1.010 1.020 1.030 -50 -30 -10 10 30 50 70 90 110 OUTPUT VOLTAGE (V) AMBIENT TEMPERATURE (°C) Output Voltage vs. Temperature LOAD = 0A LOAD = 1A CONDITIONS VIN = 5.0V VOUT_NOM = 1.0V 3.280 3.290 3.300 3.310 3.320 3.330 3.340 3.350 -50 -30 -10 10 30 50 70 90 110 OUTPUT VOLTAGE (V) AMBIENT TEMPERATURE (°C) Output Voltage vs. Temperature LOAD = 0A LOAD = 1A CONDITIONS VIN = 5.0V VOUT_NOM = 3.3V 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 55 60 65 70 75 80 85 90 95 100 105 MAXIMUM OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) Output Current De-rating VOUT = 1.0V VOUT = 1.8V VOUT = 2.5V CONDITIONS VIN = 3.3V TJMAX = 125°C θJA = 80°C/W No Air Flow
www.altera.com/enpirion, Page 8 Typical Performance Curves (Continued) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 55 60 65 70 75 80 85 90 95 100 105 MAXIMUM OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) Output Current De-rating VOUT = 1.0V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V CONDITIONS VIN = 5.0V TJMAX = 125°C θJA = 80°C/W No Air Flow
www.altera.com/enpirion, Page 9 Typical Performance Characteristics VOUT (AC Coupled) Output Ripple at 20MHz Bandwidth CONDITIONS VIN = 5.0V VOUT = 1.2V IOUT = 1A VOUT (AC Coupled) Output Ripple at 20MHz Bandwidth CONDITIONS VIN = 5V VOUT = 3.3V IOUT = 1A VOUT (AC Coupled) Output Ripple at 20MHz Bandwidth CONDITIONS VIN = 3.3V VOUT = 1.2V IOUT = 1A VOUT (AC Coupled) Output Ripple at 20MHz Bandwidth CONDITIONS VIN = 3.3V VOUT = 1.8V IOUT = 1A ENABLE Enable Power Up CONDITIONS VIN = 5.0V VOUT = 3.3V LOAD = 1A VOUT Enable Power Down ENABLE CONDITIONS VIN = 5.0V VOUT = 3.3V LOAD = 1A VOUT
www.altera.com/enpirion, Page 10 Typical Performance Characteristics (Continued) VOUT (AC Coupled) Load Transient from 0 to 1A CONDITIONS VIN = 5V VOUT = 1.2V LOAD VOUT (AC Coupled) Load Transient from 0 to 1A CONDITIONS VIN = 5V VOUT = 3.3V LOAD VOUT (AC Coupled) Load Transient from 0 to 1A CONDITIONS VIN = 3.7V VOUT = 1.2V LOAD VOUT (AC Coupled) Load Transient from 0 to 1A CONDITIONS VIN = 3.3V VOUT = 1.8V LOAD
Figure 5. Functional Block Diagram
www.altera.com/enpirion, Page 12 Functional Description Functional Overview The EP53A8xQA requires only 2 small MLCC capacitors and an 0201MLC resistor for a complete DC -DC converter solution. The device integrates MOSFET switches, PWM controller, Gate- drive, compensation, and inductor into a tiny 3mm x 3mm x 1.1mm QFN package. Advanced package design, along with the high level of integration, provides very low output ripple and noise. The EP53A8x QA 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 EP53A8x QA comes with two VID output voltage ranges. The EP53A8H QA provides V OUT settings from 1.8V to 3.3V, the EP53A8LQA 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-0.5V range. The EP53A8x QA provides the industry’s highest power density of any 1A DCDC 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 seamless 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 EP53A8xQA 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 DCDC converter design. Voltage Mode Control, High Bandwidth The EP53A8xQA 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 Internal 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 EP53A8HQA has a soft-start slew rate that is twice that of the EP53A8LQA. When the EP53A8L QA 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. Assuming no- load at startup, the
www.altera.com/enpirion, Page 13 maximum total capacitance on the output, including the output filter capacitor and bulk and decoupling capacitance, at the load, is given as: EP53A8LQA: C OUT_TOTAL_MAX = C OUT_Filter + C OUT_BULK = 250uF EP53A8HQA: COUT_TOTAL_MAX = C OUT_Filter + C OUT_BULK = 125uF EP53A8LQA (in external divider mode): C OUT_TOTAL_MAX = 2.25x10-4/VOUT Farads The nominal value for C OUT is 10uF. See the applications section for more details. 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 V OUT 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. 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 lockout circuitry will again disable the switching. Hysteresis is included to prevent chattering between states. 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 25C°, the device will go through the normal startup process.
www.altera.com/enpirion, Page 14
Application Information
10µF 0805 X7R 4.7µF 0603 X7R VOUTPVIN AVIN PGND AGND VSENSE EP53A8HQA 100Ω VS0 VS1 VS2 ENABLE Figure 6. EP53A8HQA VID Application Circuit Figure 7. EP53A8LQA VID Application Circuit also has an external divider option. of the output voltage selected. NOTE: The VID pins must not be left floating.
logic high and logic low is indeterminate. VOUT as indicated in Figure 8. Figure 8. EP53A8LQA External VOUT Setting preset voltages range from 1.8V to 3.3V. changed while the device is enabled. logic high and logic low is indeterminate. These pins must not be left floating. up to 1.5V when it is first enabled.
www.altera.com/enpirion, Page 16 input filter applications. Output Filter Capacitor The output filter cap acitor requirement is a minimum of 10µF 0805 MLCC. Ripple performance can be improved by using 2x10µF 0805 MLCC capacitors. The maximum output filter capacitance next to the output pins of the device is 60µF low ESR MLCC capacitance. V OUT has to be sense d at the last output filter capacitor next to the EP53A8xQA. Additional bulk capacitance for decoupling and bypass can be placed at the load as long as there is sufficient separation between the V OUT Sense point and the bulk capacitance. The separation provides an inductance that isolates the control loop from 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 capacit ance on the output. The output capacitor must use X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and temperature and are not suitable for switch -mode DC -DC converter output filter applications.
PowerSoC helps alleviate some of those concerns. packaged in a 3x3x 1.1mm 16-pin QFN package. the thermal performance of the EP53A8xQA. First calculate the output power. efficiency (η) shown in Figure 9. Figure 9. Efficiency vs. Output Current output power from the input power. JA value of 80 ºC/W without airflow. ambient temperature to be 25°C.
recommendations in this section. minimized, even under the capacitors. converter input and output switching loops. the converter and the input/output capacitors. Figure 10. Top PCB Layer Critical Components connect these vias to the ground plane.
Figure 11. EP53A8xQA PCB Footprint (Top View)
Figure 12. EP53A8LQA Package Dimensions (Bottom View)
Figure 13. EP53A8HQA Package Dimensions (Bottom View)