EP5358HUI

EP5358LUI/EP5358HUI 600mA Synchronous Buck Regulator with Integrated Inductor RoHS Compliant; Halogen Free 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 • 2.5mm x 2.25mm x 1.1mm uQFN package • Total Solution Footprint 12mm2 • Low VOUT ripple for RF compatibility • High efficiency, up to 93% 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 12mm2. • Up to 600mA continuous output current • Less than 1µA standby current • 5 MHz switching frequency • 3 pin VID for glitch free voltage scaling 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. • VOUT Range 0.6V to VIN – 0.25V • Short circuit and over current protection • UVLO and thermal protection 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. • IC level reliability in a PowerSOC solution The EP5358xUI is a perfect solution for noise sensitive and space constrained applications that require high efficiency. Application • Wireless and RF applications • Wireless broad band data cards • Smart phone and portable media players • Advanced Low Power Processors, DSP, IO, Memory, Video, Multimedia Engines AVIN VSENSE PVIN VOUT VOUT ENABLE 10uF 2.25mm 2.2uF VIN 2.2uF EP5358xUI EP5358HUI 10uF VS0 VS1 VS2 PGND AGND 4.75mm Figure 2: Typical Application Schematic Figure 1: Total Solution Footprint. www.enpirion.com 03541 09/23/2010 Rev: D EP5358LUI/EP5358HUI EP5358LUI LOW VID Range 16-pin QFN T&R EP5358HUI HIGH VID Range 16-pin QFN T&R EP5358LUI-E EP5358LUI Evaluation Board EP5358HUI-E EP5358HUI Evaluation Board NC(SW) 1 PGND 2 PGND 3 VFB 4 VSENSE 5 AGND 6 NC(SW) Package NC(SW) Comment 16 15 EP5358LUI Part Number Pin Assignments (Top View) 14 PVIN 13 AVIN 12 ENABLE 11 10 VS1 9 VOUT 7 VS0 VS2 8 VOUT Ordering Information 2 PGND 3 NC 4 VSENSE 5 AGND 6 NC(SW) 15 EP5358HUI PGND 16 14 PVIN 13 AVIN 12 ENABLE 11 VS0 10 VS1 9 7 8 VOUT 1 VOUT NC(SW) NC(SW) Figure 3: EP5358LUI Pin Out Diagram (Top View) VS2 Figure 4: EP5358HUI Pin Out Diagram (Top View) Pin Description PIN NAME 1, 15, 16 NC(SW) 2,3 PGND 4 VFB/NC 5 VSENSE 6 AGND 7, 8 VOUT 9, 10, 11 VS2, VS1, VS0 12 13 14 ENABLE AVIN PVIN FUNCTION 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. Power ground. Connect these pins together and to the ground electrode of the Input and output filter capacitors. EP5358LUI: Feed back pin for external divider option. EP5358HUI: No Connect Sense pin for preset output voltages. Refer to application section for proper configuration. Analog ground. This is the quiet ground for the internal control circuitry, and the ground return for external feedback voltage divider Regulated Output Voltage. Refer to application section for proper layout and decoupling. 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.) Output Enable. Enable = logic high; Disable = logic low Input power supply for the controller circuitry. Input Voltage for the MOSFET switches. Enpirion 2010 all rights reserved, E&OE 03541 2 09/23/2010 www.enpirion.com Rev: D EP5358LUI/EP5358HUI 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 cause permanent damage to the device. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. PARAMETER SYMBOL MIN MAX UNITS 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 150 °C 150 °C Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020C 260 °C ESD Rating (based on Human Body Mode) 2000 V Input Supply Voltage Maximum Operating Junction Temperature TJ-ABS Storage Temperature Range TSTG -65 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 Thermal Resistance: Junction to Ambient –0 LFM (Note 1) Thermal Overload Trip Point Thermal Overload Trip Point Hysteresis SYMBOL TYP UNITS θJA 85 °C/W TJ-TP +155 °C 25 °C Note 1: Based on a four layer copper board and proper thermal design per JEDEC EIJ/JESD51 standards Enpirion 2010 all rights reserved, E&OE 03541 3 09/23/2010 www.enpirion.com Rev: D EP5358LUI/EP5358HUI Electrical Characteristics NOTE: TA = -40°C to +85°C unless otherwise noted. Typical v alues are at TA = 25°C, VIN = 3.6V. CIN = 4.7µF MLCC, COUT = 10µF PARAMETER SYMBOL TEST CONDITIONS MIN TYP Operating Input Voltage Range VIN Under Voltage Lock-out – VIN Rising VUVLO_R 2.0 V Under Voltage Lock-out – VIN Falling VUVLO_F 1.9 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 Rate (VID Change) VSLEW EP5358LUI EP5358HUI VID Preset VOUT Initial Accuracy ∆VOUT TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V Line Regulation ∆VOUT_LINE 2.4V ≤ VIN ≤ 5.5V 0.03 %/V Load Regulation ∆VOUT_LOAD 0A ≤ ILOAD ≤ 600mA 0.48 %/A Temperature Variation ∆VOUT_TEMPL -40°C ≤ TA ≤ +85°C 24 ppm/°C Output Current IOUT Shut-down Current ISD Enable = Low OCP Threshold ILIM 2.4V ≤ VIN ≤ 5.5V 0.6V ≤ VOUT ≤ 3.3V Feedback Pin Voltage Initial Accuracy VFB TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V Feedback Pin Input Current IFB Note 1 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 Enable Pin Logic Low VENLO Enable Pin Logic High VENHI Enable Pin Current IENABLE Operating Frequency FOSC 2.4 350 0.6 1.8 MAX UNITS 5.5 V 500 VIN-VDO 3.3 4 8 mΩ V V/mS -2 +2 600 % mA 0.75 µA 1.25 1.4 A .588 0.6 0.612 4.3V, COUT_MIN = 10uF 0805 MLCC. Ripple performance can be improved by using 2x10µF 0603 MLCC capacitors (for any allowed VIN). The maximum output filter capacitance next to the output pins of the device is 60µF 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 switchmode DC-DC converter output filter applications. 13 09/23/2010 www.enpirion.com Rev: D EP5358LUI/EP5358HUI Recommended PCB Footprint Figure 10: EP5358xUI Package PCB Footprint Enpirion 2010 all rights reserved, E&OE 03541 14 09/23/2010 www.enpirion.com Rev: D EP5358LUI/EP5358HUI Package and Mechanical Figure 11: EN5358xUI Package Dimensions Enpirion 2010 all rights reserved, E&OE 03541 15 09/23/2010 www.enpirion.com Rev: D EP5358LUI/EP5358HUI Contact Information Enpirion, Inc. Perryville III 53 Frontage Road Suite 210 Hampton, NJ 08827 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 2010 all rights reserved, E&OE 03541 16 09/23/2010 www.enpirion.com Rev: D