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EVB-ER3105DI Datasheet(PDF) 1 Page - Altera Corporation |
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EVB-ER3105DI Datasheet(HTML) 1 Page - Altera Corporation |
1 / 25 page March 2014 Altera Corporation DS-1041 Datasheet © 2014 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, HARDCOPY, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identified as trademarks or service marks are the property of their respective holders as described at www.altera.com/common/legal.html. Altera warrants performance of its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any products and services at any time without notice. Altera assumes no responsibility or liability arising out of the application or use of any information, product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised to obtain the latest version of device specifications before relying on any published information and before placing orders for products or services. 101 Innovation Drive San Jose, CA 95134 www.altera.com Subscribe ISO 9001:2008 Registered Enpirion® Power Datasheet ER3105DI 500mA Wide VIN Synchronous Buck Regulator The Altera® Enpirion® ER3105DI is a 500mA Synchronous buck regulator with an input range of 3V to 36V. It provides an easy to use, high efficiency low BOM count solution for a variety of applications. The ER3105DI integrates both high-side and low-side NMOS FET's and features a PFM mode for improved efficiency at light loads. This feature can be disabled if forced PWM mode is desired. The part switches at a default frequency of 500kHz but may also be programmed using an external resistor from 300kHz to 2MHz. The ER3105DI has the ability to utilize internal or external compensation. By integrating both NMOS devices and providing internal configuration options, minimal external components are required, reducing BOM count and complexity of design. With the wide VIN range and reduced BOM the part provides an easy to implement design solution for a variety of applications while giving superior performance. It provides a very robust design for industrial, battery, and FPGA power applications. The part is available in a small Pb free 4mmx3mm DFN plastic package with an operation temperature range of -40°C to +125°C Features • Wide input voltage range 3V to 36V • Synchronous Operation for high efficiency • No compensation required • Integrated High-side and Low-side NMOS devices • Selectable PFM or forced PWM mode at light loads • Internal fixed (500kHz) or adjustable Switching frequency 300kHz to 2MHz • Continuous output current up to 500mA • Internal or external Soft-start • Minimal external components required • Power-good and enable functions available. Applications • FPGA power • Digital processor power • Mixed-signal ASIC power • Industrial control • Medical devices • Portable instrumentation • Distributed Power supplies • Cloud Infrastructure FIGURE 1. TYPICAL APPLICATION FIGURE 2. EFFICIENCY vs LOAD, PFM, VOUT = 3.3V GND CBOOT 100nF CFB R3 R2 SW SS SYNC BOOT PVIN PGND FSW COMP FB AVINO POK EN CAVINO 1µF CVIN 10µF L1 22µH COUT 10µF 1 2 3 4 5 6 9 10 11 12 INTERNAL DEFAULT PARAMETER SELECTION COUT 10µF VOUT 50 55 60 65 70 75 80 85 90 95 100 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 OUTPUT LOAD (A) VIN = 5V VIN = 15V VIN = 24V VIN = 33V VIN = 12V 09616 March 14, 2014 Rev A |
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