EN2360QI 6A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor Description Features The EN2360QI is a Power System on a Chip (PowerSoC) DC-DC converter. It integrates MOSFET switches, small-signal control circuits, compensation and an integrated inductor in an advanced 8x11x3mm QFN module. It offers high efficiency, excellent line and load regulation over temperature. The EN2360QI operates over a wide input voltage range and is specifically designed to meet the precise voltage and fast transient requirements of high-performance products. The EN2360QI features frequency synchronization to an external clock, power OK output voltage monitor, programmable soft-start along with thermal and over current protection. The device’s advanced circuit design, ultra high switching frequency and proprietary integrated inductor technology delivers high-quality, ultra compact, nonisolated DC-DC conversion. • • • • • • • • • • • • The Enpirion solution significantly helps in system design and productivity by offering greatly simplified board design, layout and manufacturing requirements. In addition, overall system level reliability is improved given the small number of components required with the Enpirion solution. All Enpirion products are RoHS compliant and leadfree manufacturing environment compatible. Integrated Inductor, MOSFETs, Controller Wide Input Voltage Range: 4.5V – 14V Total Solution Size Estimate: 185mm2 Frequency Synchronization (External Clock) 2% VOUT Accuracy (Over Line/Load/Temperature) Output Enable Pin and Power OK signal Programmable Soft-Start Time Can be Pin Compatible with the EN2340QI (4A) Under Voltage Lockout Protection (UVLO) Programmable Over Current Protection Thermal Shutdown and Short Circuit Protection RoHS Compliant, MSL Level 3, 260oC Reflow Applications • • • • • Space Constrained Applications Distributed Power Architectures Output Voltage Ripple Sensitive Applications Beat Frequency Sensitive Applications Servers, Embedded Computing Systems, LAN/SAN Adapter Cards, RAID Storage Systems, Industrial Automation, Test and Measurement, and Telecommunications Efficiency vs. Output Current 100 90 EFFICIENCY (%) 80 70 60 50 40 30 VOUT = 3.3V 20 VOUT = 1.8V VOUT = 1.2V 10 CONDITIONS VIN = 12.0V AVIN = 3.3V Dual Supply 0 0 0.5 Figure 1. Simplified Applications Circuit (Footprint Optimized) 1 1.5 2 2.5 3 3.5 4 4.5 OUTPUT CURRENT (A) 5 5.5 6 Figure 2. Highest Efficiency in Smallest Solution Size www.enpirion.com 07514 September 17, 2012 Rev: A EN2360QI Ordering Information Part Number EN2360QI EN2360QI-E Package Markings EN2360QI EN2360QI Temp Rating (°C) -40 to +85 Package Description 68-pin (8mm x 11mm x 3mm) QFN T&R QFN Evaluation Board Packing and Marking Information: http://www.enpirion.com/resource-center-packing-and-marking-information.htm Pin Assignments (Top View) Figure 3: 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: Shaded area highlights exposed metal below the package that is not to be mechanically or electrically connected to the PCB. Refer to Figure 12 for details. NOTE C: White ‘dot’ on top left is pin 1 indicator on top of the device package. Pin Description I/O Legend: PIN 1-15, 25-26, 59, 6468 P=Power NAME I/O NC NC G=Ground I=Input O=Output I/O=Input/Output FUNCTION NO CONNECT – These pins may be internally connected. Do not connect them to each other or to any other electrical signal. Failure to follow this guideline may result in device damage. ©Enpirion 2012 all rights reserved, E&OE 07514 NC=No Connect Enpirion Confidential September 17, 2012 www.enpirion.com, Page 2 Rev: A EN2360QI PIN NAME I/O 16-24 VOUT O 27-28, 61-63 NC(SW) NC 29-34 PGND G 35-41 PVIN P 42 AVINO O 43 44 PG BTMP I/O I/O 45 VDDB O 46 BGND G 47 S_IN I 48 S_OUT O 49 POK O 50 ENABLE I 51 AVIN P 52, 53 AGND G 54 VFB I/O 55 EAIN O 56 SS I/O 57 RCLX I/O 58 FADJ I/O 60 CGND 69 PGND FUNCTION Regulated converter output. Connect these pins to the load and place output capacitor between these pins and PGND pins 29-31. NO CONNECT – These pins are internally connected to the common switching node of the internal MOSFETs. They are not to be electrically connected to any external signal, ground, or voltage. Failure to follow this guideline may result in damage to the device. Input/Output power ground. Connect these pins to the ground electrode of the input and output filter capacitors. See VOUT and PVIN pin descriptions for more details. Input power supply. Connect to input power supply. Decouple with input capacitor to PGND pins 32-34. Internal 3.3V linear regulator output. Connect this pin to AVIN (Pin 51) for applications where operation from a single input voltage (PVIN) is required. If AVINO is being used, place a 1µF, X5R, capacitor between AVINO and AGND as close as possible to AVINO. Place a 47nF, X5R, capacitor between this pin and BTMP. See pin 43 description. Internal regulated voltage used for the internal control circuitry. Place a 0.22µF, X5R, capacitor between this pin and BGND. See pin 45 description. Digital Input. This pin accepts either an input clock to phase lock the internal switching frequency or a S_OUT signal from another EN2360QI. Leave this pin floating if not used. Digital Output. PWM signal is output on this pin. Leave this pin floating if not used. Power OK is an open drain transistor (pulled up to AVIN or similar voltage) used for power system state indication. POK is logic high when VOUT is within -10% of VOUT nominal. Leave this pin floating if not used. Input Enable. Applying a logic high to this pin enables the output and initiates a soft-start. Applying a logic Low disables the output. Do not leave floating. 3.3V Input power supply for the controller. Place a 0.1µF, X5R, capacitor between AVIN and AGND. Analog Ground. This is the ground return for the controller. All AGND pins need to be connected to a quiet ground. External Feedback Input. The feedback loop is closed through this pin. A voltage divider at VOUT is used to set the output voltage. The mid-point of the divider is connected to VFB. A phase lead capacitor from this pin to VOUT is also required to stabilize the loop. Optional Error Amplifier Input. Allows for customization of the control loop for performance optimization. Leave this pin floating if not used. Soft-start node. The soft-start capacitor is connected between this pin and AGND. The value of this capacitor determines the startup time. See Soft-Start Operation in the Functional Description section for details. Programmable over-current protection. Placement of a resistor on this pin will adjust the over-current protection threshold. See Table 2 for the recommended RCLX Value to set OCP at the nominal value specified in the Electrical Characteristics table. No current limit protection when this pin is left floating. Adding a resistor (RFS) to this pin will adjust the switching frequency of the EN2360QI. See Table 1 for suggested resistor values on RFS for various PVIN/VOUT combinations to maximize efficiency. Do not leave this pin floating. Test pin. For Enpirion Internal Use Only. Connect to GND plane at all times. Not a perimeter pin. Device thermal pad to be connected to the system GND plane for heatsinking purposes. ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 3 Rev: A EN2360QI 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 VIN -0.5 15 V Pin Voltages – AVINO, AVIN, ENABLE, POK, S_IN, S_OUT, M/S 2.5 6.0 V Pin Voltages – VFB, SS, EAIN, RCLX, FADJ -0.5 2.75 V PVIN Slew Rate 0.3 3 V/ms -65 150 °C 150 °C Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020A 260 °C ESD Rating - all pins (based on Human Body Model) 2000 V ESD Rating (based on CDM) 500 V Voltages on – PVIN, VOUT Storage Temperature Range TSTG Maximum Operating Junction Temperature TJ-ABS Max Recommended Operating Conditions SYMBOL MIN MAX UNITS PVIN: Input Voltage Range PARAMETER PVIN 4.5 14.0 V AVIN: Controller Supply Voltage AVIN 2.5 5.5 V Output Voltage Range (Note 1) VOUT 0.6 5.0 V Output Current IOUT 6.0 A Operating Junction Temperature TJ-OP - 40 125 °C Operating Ambient Temperature TAMB - 40 85 °C Thermal Characteristics PARAMETER SYMBOL TYP UNITS Thermal Resistance: Junction to Ambient (0 LFM) (Note 2) θJA 16 °C/W Thermal Resistance: Junction to Case (0 LFM) θJC 2 °C/W Thermal Shutdown TSD 160 °C Thermal Shutdown Hysteresis TSDH 35 °C Note 1: RCLX resistor value may need to be raised for VOUT > VIN – 2.5V to increase current limit threshold. Contact [email protected] for details. Note 2: Based on 2oz. external copper layers and proper thermal design in line with EIJ/JEDEC JESD51-7 standard for high thermal conductivity boards. ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 4 Rev: A EN2360QI Electrical Characteristics NOTE: VIN=12V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted. Typical values are at TA = 25°C. PARAMETER MAX UNITS Operating Input Voltage SYMBOL PVIN TEST CONDITIONS MIN 4.5 TYP 14.0 V Controller Input Voltage AVIN 2.5 5.5 V PVIN Under Voltage Lock-out UVLOPVIN Voltage above which UVLO is not asserted 2 V AVIN Under Voltage Lock-out rising AVINUVLOR Voltage above which UVLO is not asserted 2.3 V AVIN Under Voltage Lock-out falling AVINOVLOF Voltage below which UVLO is asserted 2.1 V IAVIN 9 mA AVINO 3.3 V AVIN Pin Input Current Internal Linear Regulator Output Voltage IPVINS PVIN=12V, AVIN=3.3, ENABLE=0V 300 μA IAVINS PVIN=12V, AVIN=3.3, ENABLE=0V 50 μA Feedback Pin Voltage VFB Feedback Pin Voltage VFB Feedback pin Input Leakage Current IFB Feedback node voltage at: VIN = 12V, ILOAD = 0, TA = 25°C Feedback node voltage at: 4.5V ≤ VIN ≤ 14V 0A ≤ ILOAD ≤ 6A, TA = -40 to 85°C VFB pin input leakage current (Note 3) Shut-Down Supply Current VOUT Rise Time tRISE Soft Start Capacitor Range CSS_RANGE Maximum Continuous Output Current IOUT_CONT Over Current Trip Level IOCP CSS = 47nF (Note 3, Note 4 and Note 5) 0.594 0.60 0.606 0.588 0.60 0.612 -5 1.96 2.8 Reference Table 2 V 5 nA 3.64 ms 47 0 V nF 6 9 A A ENABLE Logic High VENABLE_HIGH 4.5V ≤ VIN ≤ 14V; 1.8 AVIN V ENABLE Logic Low VENABLE_LOW 4.5V ≤ VIN ≤ 14V; 0 0.6 V ENABLE Lockout Time TENLOCKOUT ENABLE pin Input Current Switching Frequency IENABLE FSW 180kΩ pull down (Note 3) RFADJ =3kΩ External SYNC Clock Frequency Lock Range FPLL_LOCK Range of SYNC clock frequency S_IN Threshold – Low VS_IN_LO S_IN Clock Logic Low Level (Note 3) S_IN Threshold – High VS_IN_HI S_IN Clock Logic High Level (Note 3) S_OUT Threshold – Low VS_OUT_LO S_OUT Clock Logic Low Level (Note 3) S_OUT Threshold – High VS_OUT_HI S_OUT Clock Logic High Level (Note 3) ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 0.8 1.8 1.8 8 ms 4 μA 1.0 MHz 1.6 MHz 0.8 V 2.5 V 0.8 V 2.5 V www.enpirion.com, Page 5 Rev: A EN2360QI PARAMETER SYMBOL TEST CONDITIONS POK Lower Threshold POKLT Percentage of Nominal Output Voltage for POK to be Low POK Output low Voltage VPOKL With 4mA Current Sink into POK POK Output Hi Voltage VPOKH PVIN range: 4.5V ≤ VIN ≤ 14V POK pin VOH leakage current IPOKL POK High (Note 3) M/S Pin Logic Low VT-LOW Tie Pin to GND M/S Pin Logic High VT-HIGH Pull up to AVIN Through an External Resistor REXT M/S Pin Input Current IM/S VIN = 5.0V, REXT = 24.9kΩ MIN TYP MAX 90 1.8V UNITS % 0.4 V AVIN V 1 µA 0.8V V V 100 μA Note 3: Parameter not production tested but is guaranteed by design. Note 4: Rise time calculation begins when AVIN > VUVLO and ENABLE = HIGH. Note 5: VOUT Rise Time Accuracy does not include soft-start capacitor tolerance. ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 6 Rev: A EN2360QI Typical Performance Curves Efficiency vs. Output Current 100 90 90 80 80 70 70 EFFICIENCY (%) EFFICIENCY (%) Efficiency vs. Output Current 100 60 50 40 VOUT = 3.3V 30 VOUT = 1.8V 20 VOUT = 1.2V 10 CONDITIONS VIN = 10.0V AVIN = 3.3V Dual Supply 60 50 40 30 VOUT = 3.3V 20 VOUT = 1.8V VOUT = 1.2V 10 0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 OUTPUT CURRENT (A) 5 5.5 0 0.5 6 VOUT = 3.3V 5.0 4.0 3.0 CONDITIONS VIN = 12V TJMAX = 125 C θJA = 16 C/W 8x11x3mm QFN No Air Flow 2.0 1.0 0.0 75 76 77 78 79 80 81 82 83 AMBIENT TEMPERATURE ( C) 84 4.0 3.0 CONDITIONS VIN = 10V TJMAX = 125 C θJA = 16 C/W 8x11x3mm QFN No Air Flow 2.0 1.0 0.0 75 76 MAXIMUM OUTPUT CURRENT (A) MAXIMUM OUTPUT CURRENT (A) VOUT = 3.3V 4.0 CONDITIONS VIN = 12V TJMAX = 125 C θJA = 13 C/W 8x11x3mm QFN Air Flow (200fpm) 1.0 0.0 75 76 77 78 79 80 81 82 83 AMBIENT TEMPERATURE ( C) ©Enpirion 2012 all rights reserved, E&OE 77 78 79 80 81 82 83 AMBIENT TEMPERATURE ( C) 84 85 No De-rating with Air Flow 6.0 2.0 6 VOUT = 3.3V 5.0 No De-rating with Air Flow 3.0 5 5.5 6.0 85 7.0 5.0 1 1.5 2 2.5 3 3.5 4 4.5 OUTPUT CURRENT (A) Output Current De-rating 6.0 MAXIMUM OUTPUT CURRENT (A) MAXIMUM OUTPUT CURRENT (A) Output Current De-rating 07514 CONDITIONS VIN = 12.0V AVIN = 3.3V Dual Supply 84 85 7.0 6.0 VOUT = 3.3V 5.0 4.0 3.0 CONDITIONS VIN = 10V TJMAX = 125 C θJA = 13 C/W 8x11x3mm QFN Air Flow (200fpm) 2.0 1.0 0.0 75 Enpirion Confidential September 17, 2012 76 77 78 79 80 81 82 83 AMBIENT TEMPERATURE ( C) 84 85 www.enpirion.com, Page 7 Rev: A EN2360QI Typical Performance Curves Output Voltage vs. Output Current Output Voltage vs. Output Current 1.205 1.004 VIN = 8V 1.003 VIN = 10V 1.002 VIN = 12V OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.005 1.001 1.000 0.999 0.998 0.997 VIN = 8V 1.203 VIN = 10V 1.202 VIN = 12V 1.201 1.200 1.199 1.198 1.197 CONDITIONS VOUT_NOM = 1.0V 0.996 1.204 0.995 1.195 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 OUTPUT CURRENT (A) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 OUTPUT CURRENT (A) Output Voltage vs. Output Current Output Voltage vs. Output Current 2.505 1.804 VIN = 8V 1.803 VIN = 10V 1.802 VIN = 12V OUTPUT VOLTAGE (V) 1.805 OUTPUT VOLTAGE (V) CONDITIONS VOUT_NOM = 1.2V 1.196 1.801 1.800 1.799 1.798 1.797 VIN = 8V 2.503 VIN = 10V 2.502 VIN = 12V 2.501 2.500 2.499 2.498 2.497 CONDITIONS VOUT_NOM = 1.8V 1.796 2.504 CONDITIONS VOUT_NOM = 2.5V 2.496 2.495 1.795 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 OUTPUT CURRENT (A) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 OUTPUT CURRENT (A) Output Voltage vs. Temperature Output Voltage vs. Temperature 1.204 CONDITIONS VIN = 8V VOUT_NOM = 1.2V 1.203 1.202 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.204 1.201 1.200 LOAD = 0A 1.199 LOAD = 1A 1.198 LOAD = 2A LOAD = 4A 1.197 1.202 1.201 1.200 LOAD = 0A 1.199 LOAD = 1A 1.198 LOAD = 2A LOAD = 4A 1.197 LOAD = 6A 1.196 LOAD = 6A 1.196 -40 -15 10 35 60 AMBIENT TEMPERATURE ( C) ©Enpirion 2012 all rights reserved, E&OE 07514 CONDITIONS VIN = 10V VOUT_NOM = 1.2V 1.203 85 -40 Enpirion Confidential September 17, 2012 -15 10 35 60 AMBIENT TEMPERATURE ( C) 85 www.enpirion.com, Page 8 Rev: A EN2360QI Typical Performance Curves Output Voltage vs. Temperature Output Voltage vs. Temperature 1.204 CONDITIONS VIN = 12V VOUT_NOM = 1.2V 1.203 1.202 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.204 1.201 1.200 LOAD = 0A 1.199 LOAD = 1A 1.198 LOAD = 2A LOAD = 4A 1.197 LOAD = 6A 1.202 1.201 1.200 LOAD = 0A 1.199 LOAD = 1A 1.198 LOAD = 2A 1.197 LOAD = 4A LOAD = 6A 1.196 1.196 -40 -15 10 35 60 AMBIENT TEMPERATURE ( C) ©Enpirion 2012 all rights reserved, E&OE 07514 CONDITIONS VIN = 14V VOUT_NOM = 1.2V 1.203 85 -40 Enpirion Confidential September 17, 2012 -15 10 35 60 AMBIENT TEMPERATURE ( C) 85 www.enpirion.com, Page 9 Rev: A EN2360QI Typical Performance Characteristics Enable Startup/Shutdown Waveform (0A) Enable Startup/Shutdown Waveform (2A) ENABLE ENABLE VOUT VOUT POK POK LOAD CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 0A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) LOAD Enable Startup/Shutdown Waveform (4A) Enable Startup/Shutdown Waveform (6A) ENABLE ENABLE VOUT VOUT POK POK LOAD CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 4A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) LOAD Power Up Waveform (0A) PVIN VOUT VOUT POK POK CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 0A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) ©Enpirion 2012 all rights reserved, E&OE CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 6A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) Power Up Waveform (6A) PVIN LOAD 07514 CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 2A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) LOAD Enpirion Confidential September 17, 2012 CONDITIONS VIN = 12V, VOUT = 3.3V, Load = 6A, Css = 47nF CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206) www.enpirion.com, Page 10 Rev: A EN2360QI Typical Performance Characteristics Output Ripple at 20MHz Bandwidth VOUT = 1V (AC Coupled) LOAD = 0A Output Ripple at 20MHz Bandwidth VOUT = 1V (AC Coupled) VOUT = 1.8V (AC Coupled) VOUT = 1.8V (AC Coupled) VOUT = 3.3V (AC Coupled) VOUT = 3.3V (AC Coupled) 20mV / DIV 20mV / DIV CONDITIONS VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206) CONDITIONS VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206) Output Ripple at 500MHz Bandwidth LOAD = 0A VOUT = 1V (AC Coupled) VOUT = 1.8V (AC Coupled) Output Ripple at 500MHz Bandwidth LOAD = 6A VOUT = 1V (AC Coupled) VOUT = 1.8V (AC Coupled) VOUT = 3.3V (AC Coupled) VOUT = 3.3V (AC Coupled) 20mV / DIV 20mV / DIV CONDITIONS VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206) CONDITIONS VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206) Load Transient from 0 to 3A (VOUT =1V) VOUT (AC Coupled) LOAD LOAD = 6A Load Transient from 0 to 6A (VOUT =1V) VOUT (AC Coupled) CONDITIONS VIN = 12V, VOUT = 1.0V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration LOAD CONDITIONS VIN = 12V, VOUT = 1.0V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration www.enpirion.com 07514 September 17, 2012 Rev: A EN2360QI Typical Performance Characteristics Load Transient from 0 to 3A (VOUT =1.2V) VOUT (AC Coupled) LOAD Load Transient from 0 to 6A (VOUT =1.2V) VOUT (AC Coupled) CONDITIONS VIN = 12V, VOUT = 1.2V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration LOAD Load Transient from 0 to 3A (VOUT =1.8V) VOUT (AC Coupled) LOAD Load Transient from 0 to 6A (VOUT =1.8V) VOUT (AC Coupled) CONDITIONS VIN = 12V, VOUT = 1.8V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration LOAD CONDITIONS VIN = 12V, VOUT = 1.8V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration Load Transient from 0 to 6A (VOUT =3.3V) Load Transient from 0 to 3A (VOUT =3.3V) VOUT (AC Coupled) VOUT (AC Coupled) LOAD CONDITIONS VIN = 12V, VOUT = 1.2V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration CONDITIONS VIN = 12V, VOUT = 3.3V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration LOAD CONDITIONS VIN = 12V, VOUT = 3.3V CIN = 22µF (1206) COUT = 2x47µF (1206) + 100µF (1206) Using Best Performance Configuration www.enpirion.com 07514 September 17, 2012 Rev: A EN2360QI Functional Block Diagram S_OUT S_IN UVLO Digital I/O BTMP PVIN PG Linear Regulator To PLL AVINO Thermal Limit Current Limit NC(SW) Gate Drive VOUT 10k BGND (-) PWM Comp (+) PGND PLL/Sawtooth Generator FADJ VDDB Compensation Network EAIN Compensation Network (-) Error Amp (+) Power Good Logic ENABLE 180k SS Soft Start VFB POK 300k Voltage Reference Generator Band Gap Reference AVIN AGND Figure 4: Functional Block Diagram Functional Description Synchronous Buck Converter The EN2360QI is a highly integrated synchronous, buck converter with integrated controller, power MOSFET switches and integrated inductor. The nominal input voltage (PVIN) range is 4.5V to 14V and can support up to 6A of continuous output current. The output voltage is programmed using an external resistor divider network. The control loop utilizes a Type IV Voltage-Mode compensation network and maximizes on a low-noise PWM topology. Much of the compensation circuitry is internal to the device. However, a phase lead capacitor is required along with the output voltage feedback resistor divider to complete the Type IV compensation network.. The high switching ©Enpirion 2012 all rights reserved, E&OE 07514 frequency of the EN2360QI enables the use of small size input and output capacitors, as well as a wide loop bandwidth within a small foot print. Protection Features: The power supply has the following protection features: • Programmable Over-Current Protection • Thermal Shutdown with Hysteresis. • Under-Voltage Lockout Protection Additional Features: • • • Switching Frequency Synchronization. Programmable Soft-Start Power OK Output Monitoring Enpirion Confidential September 17, 2012 www.enpirion.com, Page 13 Rev: A EN2360QI Power Power Up Sequence The EN2360QI is designed to be powered by either a single input supply (PVIN) or two separate supplies: one for PVIN and the other for AVIN. Single Input Supply Application (PVIN): 47nF VIN 0.22µF VOUT PG BTMP VDDB BGND VOUT PVIN EN2360QI RVB 4.75k ENABLE 22 F 1206 AVINO 2x F 0805 RA AVIN F F CA RCA VFB SS FADJ PGND AGND RFS RCLX For dual input supply applications, the sequencing of the two input supplies, PVIN and AVIN, is very important. There are two common acceptable turnon sequences for the device. AVIN can always come up before PVIN. If PVIN comes up before AVIN, then ENABLE should be toggled last, after AVIN is asserted. During turn-off, the ENABLE should be toggled low before AVIN or PVIN is disabled. Enable Operation 47nF PGND In this application, place a 0.1µF, X7R, capacitor between AVIN and AGND as close as possible to AVIN. Refer to Figure 6 for a recommended schematic for a dual input supply application. RB RCLX Figure 5. Single Supply Applications Circuit The EN2360QI has an internal linear regulator that converts PVIN to 3.3V. The output of the linear regulator is provided on the AVINO pin once the device is enabled. AVINO should be connected to AVIN on the EN2360QI. In this application, the following external components are required: Place a 1µF, X5R/X7R, capacitor between AVINO and AGND as close as possible to AVINO. Place a 0.1µF, X5R/X7R, capacitor between AVIN and AGND as close as possible to AVIN. In addition, place a resistor (RVB) between VDDB and AVIN, as shown in Figure 5. Enpirion recommends RVB=4.75kΩ. In this application, ENABLE cannot be asserted before PVIN. If no external enable signal is used, tying ENABLE to AVIN meets this requirement. Dual Input Supply Application (PVIN and AVIN): The ENABLE pin provides a means to enable normal operation or to shut down the device. A logic high will enable the converter into normal operation. When the ENABLE pin is asserted (high) the device will undergo a normal soft-start, allowing the output voltage to rise monotonically into regulation. A logic low will disable the converter and the device will power down in a controlled manner. The ENABLE signal has to be low for at least the ENABLE Lockout Time (8ms) in order for the device to be re-enabled. Pre-Bias Precaution The EN2360QI is not designed to be turned on into a pre-biased output voltage. Be sure the output capacitors are not charged or the output of the EN2360QI is not pre-biased when the EN2360QI is first enabled. Frequency Synchronization The switching frequency of the EN2360QI can be phase-locked to an external clock source to move unwanted beat frequencies out of band. The internal switching clock of the EN2360QI can be phase locked to a clock signal applied to the S_IN pin. An activity detector recognizes the presence of an external clock signal and automatically phaselocks the internal oscillator to this external clock. Phase-lock will occur as long as the input clock frequency is in the range of 0.8MHz to 1.6MHz. When no clock is present, the device reverts to the free running frequency of the internal oscillator. Adding a resistor (RFS) to the FADJ pin will adjust the switching frequency. If a 3kΩ resistor is placed on FADJ the nominal switching frequency of the EN2360QI is 1MHz. Figure 7 shows the typical RFS resistor value versus switching frequency. Figure 6: Dual Input Supply Application Circuit ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 14 Rev: A EN2360QI threshold to when VOUT reaches its programmed value. Rfs vs. SW Frequency SWITCHING FREQUENCY (MHz) 1.800 POK Operation 1.600 The POK signal is an open drain signal (requires a pull up resistor to AVIN or similar voltage) from the converter indicating the output voltage is within the specified range. Typically, a 100kΩ or lower resistance is used as the pull-up resistor. The POK signal will be logic high (AVIN) when the output voltage is above 90% of the programmed voltage level. If the output voltage is below this point, the POK signal will be a logic low. The POK signal can be used to sequence down-stream converters by tying to their enable pins. 1.400 1.200 1.000 CONDITIONS VIN = 6V to 12V VOUT = 0.8V to 3.3V 0.800 0.600 0 2 4 6 8 10 12 14 16 18 20 22 RFS RESISTOR VALUE (kΩ) Figure 7. RFS versus Switching Frequency Over-Current Protection (OCP) The efficiency performance of the EN2360QI for various VOUTs can be optimized by adjusting the switching frequency. Table 1 shows recommended RFS values for various VOUTs in order to optimize performance of the EN2360QI. PVIN 12V VOUT 1.0V 1.2V 1.8V 2.5V 3.3V 5.0V RFS 3k 3.3k 4.87k 10k 15k 22k Table 1: Recommended RFS Values Spread Spectrum Mode The external clock frequency may be swept between 0.8MHz and 1.6MHz at repetition rates of up to 10 kHz in order to reduce EMI frequency components. Soft-Start Operation Soft start is a means to ramp the output voltage gradually upon start-up. The output voltage rise time is controlled by the choice of soft-start capacitor, which is placed between the SS pin (pin 56) and the AGND pin (pin 52). Rise Time (ms): TR ≈ Css [nF] x 0.06 During start-up of the converter, the reference voltage to the error amplifier is linearly increased to its final level by an internal current source of approximately 10µA. Typical soft-start rise time is ~2.8ms with SS capacitor value of 47nF. The rise time is measured from when VIN > VUVLOR and ENABLE pin voltage crosses its logic high ©Enpirion 2012 all rights reserved, E&OE 07514 The current limit function is achieved by sensing the current flowing through a sense PFET. When the sensed current exceeds the current limit, both power FETs are turned off for the rest of the switching cycle. If the over-current condition is removed, the over-current protection circuit will reenable PWM operation. If the over-current condition persists, the circuit will continue to protect the load. The OCP trip point is nominally set as specified in the Electrical Characteristics table. In the event the OCP circuit trips consistently in normal operation, the device enters a hiccup mode. While in hiccup mode, the device is disabled for a short while and restarted with a normal soft-start. The hiccup time is approximately 32ms. This cycle can continue indefinitely as long as the over current condition persists. The OCP trip point can be programmed to trip at a lower level via the RCLX pin. The value of the resistor connected between RCLX and ground will determine the OCP trip point. Generally, the higher the RCLX value, the higher the current limit threshold. Note that if RCLX pin is left open the output current will be unlimited and the device will not have current limit protection. Reference Table 2 for a list of recommended resistor values on RCLX that will set the OCP trip point at the typical value of 9A, also specified in the Electrical Characteristics table. VOUT Range 0.6V < VOUT ≤ 0.9V 0.9V < VOUT ≤ 1.2V 1.2V < VOUT ≤ 2.0V 2.0V < VOUT ≤ 5.0V RCLX Value 36.5k 38.4k 40.2k 45.3k Table 2: Recommended RCLX Values vs. VOUT Enpirion Confidential September 17, 2012 www.enpirion.com, Page 15 Rev: A EN2360QI Thermal Overload Protection Input Under-Voltage Lock-Out (UVLO) Thermal shutdown circuit will disable device operation when the junction temperature exceeds approximately 150ºC. After a thermal shutdown event, when the junction temperature drops by approx 20ºC, the converter will re-start with a normal soft-start. Internal circuits ensure that the converter will not start switching until the input voltage is above the specified minimum voltage. Hysteresis, input deglitch and output leading edge blanking ensures high noise immunity and prevents false UVLO triggers. Application Information Output Voltage Programming and Loop Compensation The EN2360QI uses a Type IV Voltage Mode compensation network. Type IV Voltage Mode control is a proprietary Enpirion control scheme that maximizes control loop bandwidth to deliver excellent load transient responses and maintain output regulation with pin point accuracy. For ease of use, most of this network has been customized and is integrated within the device package. The EN2360QI output voltage is programmed using a simple resistor divider network (RA and RB). The feedback voltage at VFB is nominally 0.6V. RA is predetermined based on Table 5 and RB can be calculated based on Figure 10. The values recommended for COUT, CA, RCA and REA make up the external compensation of the EN2360QI. It will vary with each PVIN and VOUT combination to optimize on performance. The EN2360QI solution can be optimized for either smallest size or highest performance. Please see Table 5 for a list of recommended RA, CA, RCA, REA and COUT values for each solution. Input Capacitor Selection The EN2360QI requires a 22µF/1206 input capacitor. Low-cost, low-ESR ceramic capacitors should be used as input capacitors for this 07514 Recommended Input Capacitors Description 22µF, 16V, X5R, 10%, 1206 22µF, 16V, X5R, 20%, 1206 MFG P/N Murata GRM31CR61C226ME15 Taiyo Yuden EMK316ABJ226ML-T Table 3: Recommended Input Capacitors Output Capacitor Selection As seen from Table 5, the EN2360QI has been optimized for use with one 100µF/1206 plus two 47µF/1206 output capacitors for best performance. For the smallest solution size configuration see Table 5. Low ESR ceramic capacitors are required with X5R or X7R rated dielectric formulation. Y5V or equivalent dielectric formulations must not be used as these lose too much capacitance with frequency, temperature and bias voltage. Table 4 contains a list of recommended output capacitors Output ripple voltage is determined by the aggregate output capacitor impedance. Capacitor impedance, denoted as Z, is comprised of capacitive reactance, effective series resistance, ESR, and effective series inductance, ESL reactance. Figure 8: VOUT Resistor Divider & Compensation Components. See Table 5 for details. ©Enpirion 2012 all rights reserved, E&OE converter. The dielectric must be X5R or X7R rated. Y5V or equivalent dielectric formulations must not be used as these lose too much capacitance with frequency, temperature and bias voltage. In some applications, lower value capacitors are needed in parallel with the larger, capacitors in order to provide high frequency decoupling. Table 3 contains a list of recommended input capacitors. Placing output capacitors in parallel reduces the impedance and will hence result in lower ripple voltage. Enpirion Confidential September 17, 2012 www.enpirion.com, Page 16 Rev: A EN2360QI 1 Z Total = 1 1 1 + + ... + Z1 Z 2 Zn Recommended Output Capacitors Description MFG 47µF, 6.3V, X5R, 20%, 1206 Murata 47µF, 10V, X5R, 20%, 1206 Taiyo Yuden P/N Panasonic ECJ-2FB1A226M 47µF, 6.3V, X5R, 20%, 0805 Taiyo Yuden JMK212BBJ476MG-T 22µF, 10V, X5R, 20%, 0805 Taiyo Yuden LMK212BJ226MG-T GRM31CR60J476ME19L Table 4: Recommended Output Capacitors LMK316BJ476ML-T ©Enpirion 2012 all rights reserved, E&OE 07514 22µF, 10V, X5R, 20%, 0805 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 17 Rev: A EN2360QI Best Performance Smallest Solution Size CIN = 22µF/1206 CIN = 22µF/1206 VOUT ≤ 1.8V, COUT = 2x47µF/0805 3.3V > VOUT> 1.8V, COUT = 2x47µF/1206 COUT = 100µF/1206 + 2x47µF/1206, RA = 200kΩ PVIN (V) 14V 12V 10V 8V 6.6V 5V VOUT (V) CA (pF) RCA (kΩ) REA (kΩ) Ripple (mV) Deviation (mV) PVIN (V) VOUT (V) RA (kΩ) 0.9V 15 8.2 0 5.29 26 0.9V 200 1.2V 12 8.2 0 6.6 22 1.2V 200 1.5V 12 12 0 8.39 24 1.5V 200 CA (pF) RCA (kΩ) REA (kΩ) Ripple (mV) Deviation (mV) 10 0.2 Open 15 51 10 0.2 Open 19 68 10 0.2 Open 24 66 1.8V 10 12 0 9.7 28 1.8V 200 8.2 0.2 Open 24 66 2.5V 10 12 56 18.8 54 2.5V 120 8.2 15 Open 43 86 3.3V 8.2 18 56 28.8 54 3.3V 120 6.8 15 Open 52 106 5.0V 6.8 12 56 52.1 66 5.0V 120 5.6 0.2 Open 66 152 0.9V 15 8.2 0 5.22 28 0.9V 200 12 0.2 Open 17 57 1.2V 15 8.2 0 6.51 22 1.2V 200 12 0.2 Open 18 70 1.5V 12 12 0 7.5 28 1.5V 200 12 0.2 Open 24 70 14V 12V 1.8V 10 12 0 9 34 1.8V 200 10 0.2 Open 26 80 2.5V 12 12 56 16.8 50 2.5V 120 10 15 Open 39 94 3.3V 5.0V 0.9V 10 8.2 18 18 12 8.2 56 56 0 27.3 48.5 5.01 54 74 28 3.3V 5.0V 0.9V 120 120 200 10 6.8 18 15 0.2 0.2 Open Open 45 56 15 114 164 69 1.2V 18 8.2 0 6.11 26 1.2V 200 18 0.2 Open 19 67 1.5V 15 12 0 7.3 28 1.8V 12 12 0 8.13 32 2.5V 15 12 56 16.8 3.3V 5.0V 0.9V 12 10 22 18 12 8.2 56 56 0 1.2V 18 8.2 1.5V 15 1.8V 15 2.5V 3.3V 5.0V 0.9V Open 1.5V 200 15 0.2 Open 23 78 1.8V 200 12 0.2 Open 29 94 44 2.5V 120 15 15 Open 29 98 27.2 42 4.92 68 84 26 3.3V 5.0V 0.9V 120 120 200 12 10 27 15 0.2 0.2 Open Open Open 44 52 16 128 192 68 0 5.41 32 1.2V 200 22 0.2 Open 19 75 12 0 6.48 32 1.5V 200 22 0.2 Open 23 82 12 0 7.32 36 1.8V 200 18 0.2 Open 27 104 18 12 56 16.1 64 2.5V 120 27 6.8 Open 36 124 15 12 22 18 12 8.2 56 56 0 24 31.4 4.6 72 102 30 3.3V 5.0V 0.9V 120 120 200 22 12 33 6.8 0.2 0.2 Open Open Open 36 40 14 152 236 70 1.2V 22 8.2 0 5.59 32 1.2V 200 33 0.2 Open 17 80 1.5V 18 12 0 5.88 36 1.5V 200 27 0.2 Open 21 96 1.8V 18 12 0 7.12 38 1.8V 200 27 0.2 Open 24 110 2.5V 3.3V 0.9V 22 18 27 12 18 8.2 56 56 0 15.4 21.6 3.93 56 78 32 2.5V 3.3V 0.9V 120 120 200 39 27 68 4.3 4.3 0.2 Open Open 29 28 13 140 184 80 1.2V 22 8.2 0 4.4 38 1.2V 200 56 0.2 Open 15 92 1.5V 200 47 0.2 Open 17 106 1.8V 2.5V 200 120 39 68 0.2 0.2 Open 19 21 124 172 1.5V 22 12 0 5.91 38 1.8V 2.5V 22 27 12 12 0 56 6.91 13.6 42 76 10V 8V 6.6V 5V Open Open Table 5: RA, CA, RCA and REA Values for Various PVIN/VOUT Combinations: Smallest Solution Size vs. Best Performance. See Figure 8. Use the equation in Figure 8 to calculate RB. Note 6: Nominal Deviation is for a 6A load transient step. Note 7: For compensation values of output voltage in between the specified output voltages, choose compensation values of the lower output voltage setting. ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 18 Rev: A EN2360QI 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 EN2360QI DC-DC converter is packaged in an 8x11x3mm 68-pin QFN package. The QFN package is constructed with copper lead frames that have exposed thermal pads. The exposed thermal pad on the package should be soldered directly on to a copper ground pad on the printed circuit board (PCB) to act as a heat sink. The recommended maximum junction temperature for continuous operation is 125°C. Continuous operation above 125°C 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 150°C. The following example and calculations illustrate the thermal performance of the EN2360QI. η = POUT / PIN = 87% = 0.87 PIN = POUT / η PIN ≈ 13.2W / 0.87 ≈ 22.76W 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 ≈ 22.76W – 19.8W ≈ 2.96W With the power dissipation known, the temperature rise in the device may be estimated based on the theta JA value (θJA). The θJA parameter estimates how much the temperature will rise in the device for every watt of power dissipation. The EN2360QI has a θJA value of 16 ºC/W without airflow. Determine the change in temperature (ΔT) based on PD and θJA. ΔT = PD x θJA ΔT ≈ 2.96W x 16°C/W = 47.36°C ≈ 47°C VIN = 12V The junction temperature (TJ) of the device is approximately the ambient temperature (TA) plus the change in temperature. We assume the initial ambient temperature to be 25°C. VOUT = 3.3V TJ = TA + ΔT IOUT = 6A TJ ≈ 25°C + 47°C ≈ 72°C First calculate the output power. The maximum operating junction temperature (TJMAX) of the device is 125°C, so the device can operate at a higher ambient temperature. The maximum ambient temperature (TAMAX) allowed can be calculated. Example: POUT = 3.3V x 6A = 19.8W Next, determine the input power based on the efficiency (η) shown in Figure 9. TAMAX = TJMAX – PD x θJA Efficiency vs. Output Current 100 ≈ 125°C – 47°C ≈ 78°C 90 The maximum ambient temperature the device can reach is 78°C given the input and output conditions. Note that the efficiency will be slightly lower at higher temperatures and this calculation is an estimate. EFFICIENCY (%) 80 70 60 50 40 30 VOUT = 3.3V 20 VOUT = 1.8V VOUT = 1.2V 10 CONDITIONS VIN = 12.0V AVIN = 3.3V Dual Supply 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 OUTPUT CURRENT (A) 5 5.5 6 Figure 9: Efficiency vs. Output Current For VIN = 12V, VOUT = 3.3V at 6A, η ≈ 90% ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 19 Rev: A EN2360QI Engineering Schematic Figure 10: Engineering Schematic with Engineering Notes ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 20 Rev: A EN2360QI Layout Recommendation Figure 11: Top Layer Layout with Critical Components (Top View). See Figure 10 for corresponding schematic. This layout only shows the critical components and top layer traces for minimum footprint in singlesupply mode with ENABLE tied to AVIN. Alternate circuit configurations & other low-power pins need to be connected and routed according to customer application. Please see the Gerber files at www.enpirion.com for details on all layers. Recommendation 1: Input and output filter capacitors should be placed on the same side of the PCB, and as close to the EN2360QI 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 EN2360QI 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: The PGND connections for the input and output capacitors on layer 1 need to have a slit between them in order to provide some separation between input and output current 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. ©Enpirion 2012 all rights reserved, E&OE 07514 Recommendation 4: The thermal pad underneath the component must be connected to the system ground plane through as many vias as possible. 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. This connection provides the path for heat dissipation from the converter. Recommendation 5: Multiple small vias (the same size as the thermal vias discussed in recommendation 4) should be used to connect ground terminal of the input capacitor and output capacitors to the system ground plane. It is preferred to put these vias along the edge of the GND copper closest to the +V copper. 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 vias cannot be placed under the capacitors, then place them on both sides of the slit in the top layer PGND copper. Recommendation 6: AVIN is the power supply for the 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. Recommendation 7: The layer 1 metal under the device must not be more than shown in Figure 11. Refer to the section regarding Exposed Metal on Bottom of Package. As with any switch-mode DC/DC converter, try not to run sensitive signal or control lines underneath the converter package on other layers. Recommendation 8: The VOUT sense point should be just after the last output filter capacitor. Keep the sense trace short in order to avoid noise coupling into the node. Contact Enpirion Technical Support for any remote sensing applications. Recommendation 9: Keep RA, CA, RB, and RCA close to the VFB pin (Refer to Figure 11). The VFB pin is a high-impedance, sensitive node. Keep the trace to this pin as short as possible. Whenever possible, connect RB directly to the AGND (pin 52, 53) instead of going through the GND plane. Recommendation 10: Follow all the layout recommendations as close as possible to optimize performance. Enpirion provides schematic and layout reviews for all customer designs. Contact Enpirion Applications Engineering for detailed support ([email protected]). Enpirion Confidential September 17, 2012 www.enpirion.com, Page 21 Rev: A EN2360QI Design Considerations for Lead-Frame Based Modules Exposed Metal on Bottom of Package Lead-frames offer many advantages in thermal performance, in reduced electrical lead resistance, and in overall foot print. However, they do require some special considerations. In the assembly process lead frame construction requires that, for mechanical support, some of the lead-frame cantilevers be exposed at the point where wire-bond or internal passives are attached. This results in several small pads being exposed on the bottom of the package, as shown in Figure 10. Only the thermal pad and the perimeter pads are to be mechanically or electrically connected to the PC board. The PCB top layer under the EN2360QI should be clear of any metal (copper pours, traces, or vias) except for the thermal pad. The “shaded-out” area in Figure 10 represents the area that should be clear of any metal on the top layer of the PCB. Any layer 1 metal under the shaded-out area runs the risk of undesirable shorted connections even if it is covered by soldermask. The solder stencil aperture should be smaller than the PCB ground pad. This will prevent excess solder from causing bridging between adjacent pins or other exposed metal under the package. Please consult the Enpirion Manufacturing Application Note for more details and recommendations. Figure 12: Lead-Frame exposed metal (Bottom View) Shaded area highlights exposed metal that is not to be mechanically or electrically connected to the PCB. ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 22 Rev: A EN2360QI Recommended PCB Footprint Figure 13: EN2360QI PCB Footprint (Top View) ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 23 Rev: A EN2360QI Package and Mechanical Figure 14: EN2360QI Package Dimensions (Bottom View) Packing and Marking Information: http://www.enpirion.com/resource-center-packing-and-marking-information.htm Contact Information Enpirion, Inc. Perryville III Corporate Park 53 Frontage Road - Suite 210 Hampton, NJ 08827 USA Phone: 1.908.894.6000 Fax: 1.908.894.6090 Enpirion reserves the right to make changes in circuit design and/or specifications at any time without notice. Information furnished by Enpirion is believed to be accurate and reliable. Enpirion assumes no responsibility for its use or for infringement of patents or other third party rights, which may result from its use. Enpirion products are not authorized for use in nuclear control systems, as critical components in life support systems or equipment used in hazardous environment without the express written authority from Enpirion ©Enpirion 2012 all rights reserved, E&OE 07514 Enpirion Confidential September 17, 2012 www.enpirion.com, Page 24 Rev: A