EP5368QI

EP5368QI 600mA Synchronous Buck Regulator with Integrated Inductor RoHS Compliant; Halogen Free Description Features The EP5368QI is a synchronous buck converter with integrated Inductor, PWM controller, MOSFETS, and Compensation providing the smallest possible solution size. The EP5368QI requires only two small MLCC capacitors to make a complete solution. Integration of the inductor greatly simplifies design, contains noise, reduces part count, and reduces solution footprint. Low output ripple ensures compatibility with RF systems. • • • • • • • • • • • • • • • The EP5368QI operates at a switching frequency of 4 MHz, enabling this unprecedented level of integration and small external components. Type III voltage mode control is used to provide high noise immunity and wide control loop bandwidth. The device can source 600mA of current over the industrial temperature range and up to 700mA over the commercial temperature range. The small footprint makes this part ideal for space constrained applications. Output voltage is programmed via a 3-pin VID selector providing seven pre-programmed output voltages along with an option for external resistor divider. Integrated Inductor 3mm x 3mm x 1.1mm QFN package Only two low cost MLCC caps required 4 MHz switching frequency High efficiency, up to 94% Up to 700mA continuous output current Wide 2.4V to 5.5V input range VOUT Range 0.603V to VIN – 0.4V 100% duty cycle capable Less than 1 µA standby current Low VOUT ripple for RF compatibility Short circuit and over current protection UVLO and thermal protection Stable over entire operating range RoHS compliant; MSL 3 260°C reflow Application • • • • • Noise sensitive RF applications Area constrained applications Smart phones and PDAs Personal Media Players Advanced Mobile Processors, DSP, IO, Memory, Video, Multimedia Engines VSense ENABLE VIN Vin 4.7µF 0603 VOUT Vout 22µF 0805 EP5368QI VFB Voltage Select Figure 1: Features INTEGRATED INDUCTOR TECHNOLOGY VS0 V S1 VS2 GND Figure 2: Typical Application Schematic www.enpirion.com 03260 09/23/2010 Rev: F EP5368QI Ordering Information Pin Assignments (Top View) Temp Rating (°C) Package -40 to +85 16-pin QFN T&R EP5368QI Evaluation Board Part Number EP5368QI EP5368QI-E Figure 3: Pin Out Diagram (Top View) Pin Description PIN NAME FUNCTION 1, 3, 9, 15, 16 NC NO CONNECT – These pins should not be electrically connected to each other or to any external signal, voltage, or ground. One or more of these pins may be connected internally. These pins must be soldered to the PCB. 2 PGND Power Ground Feed back pin for external divider option. When using the external divider option (VS0=VS1=VS2= high) connect this pin to the center of the external divider. Set the divider such that VFB = 0.6V. The “ground” side of the external divider should be connected to AGND. 4 VFB 5 VSENSE Sense pin for preset output voltages. Connect this to VOUT or as close to VOUT as possible to ensure the best regulation. 6 AGND Analog ground. This is the quiet ground for the internal control circuitry. 7, 8 VOUT 10, 11, 12 VS0, VS1, VS2 Output voltage select. VS2=pin10 VS1=pin11, VS0=pin12. Selects one of seven preset output voltages or choose external divider by connecting pins to logic high or low. Logic low is defined as VLOW ≤ 0.4V. Logic high is defined as VHIGH ≥ 1.4V. Any level between these two values is indeterminate. (Refer to section on output voltage select for more detail). 13 ENABLE Output enable: Enable = logic high, disable = logic low. Logic low is defined as VLOW ≤ 0.4V. Logic high is defined as VHIGH ≥ 1.4V. Any level between these two values is indeterminate. 14 VIN Regulated Output Voltage Input voltage pin. Supplies power to the IC. Enpirion 2010 all rights reserved, E&OE 03260 2 09/23/2010 www.enpirion.com Rev: F EP5368QI 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 7.0 V Voltages on: ENABLE, VSENSE, VS0 – VS2 -0.3 VIN +0.3 V Voltage on: VFB -0.3 2.7 V -65 150 °C Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020C 260 °C ESD Rating (based on Human Body Mode) 2000 V Input Supply Voltage Storage Temperature Range TSTG Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS Input Supply Voltage VIN 2.4 5.5 V Operating Ambient Temperature TA - 40 85 °C Operating Junction Temperature TJ - 40 125 °C SYMBOL TYP UNITS θJA 85 °C/W TJ-TP 150 °C 15 °C Thermal Characteristics PARAMETER Thermal Resistance: Junction to Ambient (0 LFM) Thermal Overload Trip Point Thermal Overload Trip Point Hysteresis Enpirion 2010 all rights reserved, E&OE 03260 3 09/23/2010 www.enpirion.com Rev: F EP5368QI Electrical Characteristics NOTE: TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = 25°C, V IN = 3.6V CIN = 4.7µF 0603 MLCC, COUT = 22µF 0805 MLCC PARAMETER SYMBOL Operating Input Voltage Range VIN Under Voltage Lock-out – VIN Rising VUVLO_R Under Voltage Lock-out – VIN Falling VUVLO_F Drop Out Resistance RDO Input to Output Resistance in 100% duty cycle operation. Output Voltage Range VOUT External Feedback Mode VID Mode Dynamic Voltage Slew Rate (VID Change) VSLEW VOUT Initial Accuracy (VID Preset Mode) ∆VOUT_INITIAL TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V ∆VOUT_ALL -40°C ≤ TA ≤ +85°C 2.4V ≤ VIN ≤ 5.5V; 0.8V ≤ VOUT ≤ 3.3V 0A ≤ ILOAD ≤ 700A ∆VFB_INITIAL TA = 25°C, VIN = 3.6V; ILOAD = 100mA ; 0.8V ≤ VOUT ≤ 3.3V 0.591 Feedback Pin Voltage Accuracy over line, load, and temperature variations ∆VFB_ALL -40°C ≤ TA ≤ +85°C 2.4V ≤ VIN ≤ 5.5V; 0.8V ≤ VOUT ≤ 3.3V 0A ≤ ILOAD ≤ 700A 0.585 Feedback Pin Input Current IFB Continuous Output Current IOUT VIN = 5V, 0.603V