EN5339QI 3A Low Profile Synchronous Buck DC-DC Converter with Integrated Inductor RoHS Compliant Halogen Free Description Features The EN5339 is a low profile 3A, high efficiency, Integrated Inductor synchronous buck PowerSoC. The device 2 Solution Footprint as Small as 55 mm features integrated inductor, PWM controller, Low profile, 1.1mm MOSFETS, and compensation providing the High Reliability Solution: 28,200 Years in MTTF smallest possible solution size. High Efficiency, up to 95 % The EN5339QI is pin compatible with Enpirions Low Output Ripple Voltage <5mV Typical P-P EN5322QI 2A PowerSoC enabling a family of 3% Output Variation Over Line, Load, Temp scalable solutions. 2.4 V to 5.5 V Input Voltage Range The high frequency operation allows for the use 3A Continuous Output Current Capability of tiny MLCC capacitors. It also enables a very Output Enable and Power OK Signal wide control loop bandwidth providing excellent Under Voltage Lockout, Over Current, Short transient performance and reduced output Circuit, and Thermal Protection impedance. The internal compensation is designed for unconditional stability across all RoHS Compliant Halogen Free 260C Reflow operating conditions. Applications The output voltage is set via a simple and flexible Applications with Low Profile Requirement resistor divider network. such as SSD and Embedded Computing SAN/NAS accelerator appliance The very high efficiency and low profile design Controllers, Raid, Processors, Network make this device optimal for space constrained Processors, DSPs FPGAs, and ASICs applications requiring up to 3A of continuous Noise sensitive applications output current. Efficiency vs. Output Current 100 90 80 70 60 Actual Solution Size 2 50 CONDITIONS 55mm VIN = 3.3V 40 30 VOUT = 2.5V 20 VOUT = 1.2V 10 0 0 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT (A) Figure 1. Simplified Applications Circuit Figure 2. Highest Efficiency in Smallest Solution Size www.enpirion.com EFFICIENCY (%)POK TST0 ENABLE TST1 PVIN TST2 PVIN PGND NC(SW) PGND NC(SW) VOUT NC(SW) VOUT NC(SW) VOUT EN5339QI Ordering Information Part Number Package Markings Temp Rating (C) Package Description EN5339QI EN5339 -40 to +85 24-pin (4mm x 6mm x 1.1mm) QFN T&R EN5339QI-E EN5339 QFN Evaluation Board 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: Grey area highlights exposed metal on the bottom of the package that is not to be mechanically or electrically connected to the PCB. There should be no traces on PCB top layer under these keep out areas. NOTE C: White dot on top left is pin 1 indicator on top of the device package. Pin Description PIN NAME FUNCTION NO CONNECT: These pins are internally connected to the common switching node of the internal MOSFETs. They must be soldered to PCB but not be electrically connected to any 1, 21-24 NC(SW) external signal, ground, or voltage. Failure to follow this guideline may result in device damage. Input and output power ground. Connect these pins to the ground electrode of the input and 2-3, 8-9 PGND output filter capacitors. See VOUT, PVIN descriptions and Layout Recommendation for more details. Regulated converter output. Connect to the load and place output filter capacitor(s) between 4-7 VOUT these pins and PGND pins 7 and 8. See layout recommendation for details 10 TST2 Test Pin. For Enpirion internal use only. Connect to AVIN at all times. 11 TST1 Test Pin. For Enpirion internal use only. Connect to AVIN at all times. 12 TST0 Test Pin. For Enpirion internal use only. Connect to AVIN at all times. Enpirion 2010 all rights reserved, E&OE Enpirion Confidential www.enpirion.com, Page 2