EN5311QI

DataSheeT enpirion power solutions EN5311QI 1A PowerSoC Step-Down DC-DC Switching Converter with Integrated Inductor DESCRIPTION 4 MHz switching frequency Only two low cost MLCC caps required The Ultra-Low-Profile EN5311QI is targeted to Designed for low noise/low EMI applications where board area and profile are critical. Very low ripple voltage 5mVp-p Typical EN5311QI is a complete power conversion solution High efficiency, up to 95% requiring only two low cost ceramic MLCC caps. Wide 2.4V to 6.6V input range Inductor, MOSFETS, PWM, and compensation are 1000mA continuous output current integrated into a tiny 5mm x 4mm x 1.1mm QFN Less than 1 A standby current. package. The EN5311QI is engineered to simplify Excellent transient performance design and to minimize layout constraints. 4 MHz 3 Pin VID Output Voltage select switching frequency and internal type III External divider: 0.6V to V -V IN dropout compensation provides superior transient response. 100% duty cycle capable With a 1.1 mm profile, the EN5311QI is ideal for space Short circuit and over current protection and height constrained applications. UVLO and thermal protection A 3-pin VID output voltage selector provides seven RoHS compliant MSL 3 260C reflow pre-programmed output voltages along with an option for external resistor divider. Output voltage APPLICATIONS can be programmed on-the-fly to provide fast, Area constrained applications dynamic voltage scaling. Noise Sensitive Applications such as A/V and RF LDO replacement for improved thermals FEATURES Set top box/home gateway Revolutionary Integrated Inductor Smart phones, PDAs 5mm x 4mm x1.1mm QFN package VoIP and Video phones Very small total solution foot print Personal Media Player V IN UVLO Thermal Limit Current Limit ENABLE Soft Start P-Drive Logic V (-) OUT VSENSE ENABLE PWM V OUT Comp N-Drive V IN (+) GND VIN VOUT V Sawtooth SENSE C 4.7F OUT Generator Compensation EN5311QI Network (-) Switch VS0 VFB Error V FB VOLTAGE Amp VS1 (+) SELECT VS2 GND DAC Voltage VREF Select Package Boundry VS0 VS1 VS2 Figure 1: Simplified Applications Circuit Figure 2. Featuring Integrated Inductor Technology Page 1 Datasheet Intel Enpirion Power Solutions: EN5311QI ORDERING INFORMATION Part Number Package Markings T Rating Package Description J EN5311QI N5311 -40C to +125C 20-pin (5mm x 4mm x 1.1mm) QFN EVB-EN5311QI EVB-EN5311QI QFN Evaluation Board Packing and Marking Information: