Intel/Altera EN5311QI

The Ultra- Low- Profile EN5311QI is targeted to applications where board area and profile are critical. EN5311QI is a complete power conversion solution requiring only two low cost ceramic MLCC caps. Inductor, MOSFETS, PWM, and compensation are integrated into a tiny 5mm x 4mm x 1.1mm QFN package. The EN5311QI is engineered to simplify design and to minimize layout constraints. 4 MHz switching frequency and internal type III compensation provides superior transient response. With a 1.1 mm profile, the EN5311QI is ideal for space and height constrained applications. A 3- pin VID output voltage selector provides seven pre- programmed output voltages along with an option for external resistor divider. Output voltage can be programmed on- the- fly to provide fast, dynamic voltage scaling.

• Revolutionary Integrated Inductor
• 5mm x 4mm x 1.1mm QFN package
• Very small total solution foot print
• 4 MHz switching frequency
• Only two low cost MLCC caps required
• Designed for low noise/low EMI
• Very low ripple voltage: 5mVₚ₋ₚ Typical
• High efficiency, up to 95%
• Wide 2.4V to 6.6V input range
• 1000mA continuous output current
• Less than 1μA standby current
• Excellent transient performance
• 3 Pin VID Output Voltage select
• External divider: 0.6V to VIN - Vdropout
• 100% duty cycle capable
• Short circuit and over current protection
• UVLO and thermal protection
• RoHS compliant; MSL 3 260℃ reflow

• Area constrained applications
• Noise Sensitive Applications such as A/V and RF
• LDO replacement for improved thermals
• Set top box/home gateway
• Smart phones, PDAs
• VoIP and Video phones
• Personal Media Players