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Download ETA1035 1 - ETA Solutions
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ETA1035 3W, 0.85V Startup Voltage, Synchronous Step-Up Converter with Real-Shutdown and Short-Circuit Protection DESCRIPTION FEATURES The ETA1035 is a high efficiency synchronous step-up converter that can provide up to 3W of power to a boosted output from a low voltage source. Unlike most step-up converter, not only it starts up at a very low input voltage as low as 0.85V, it also incorporates circuits that disconnect the input from output, during shutdown, short-circuit, output current overloading, or other events when output is higher than the input. This eliminates the need for an external MOSFET and its control circuitry to disconnect the input from output, and provides robust output overload protection. The ETA1035 starts up from a voltage as low as 0.85V making it ideal for applications with single-cell or two-cell alkaline, NiCd, and NiMh batteries. A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny and low profile inductors and ceramic capacitors. An internal synchronous MOSFET provides highest efficiency and with a current mode control that is internally compensated, external parts count is reduced to minimal. Output Disconnect Short-circuit Protection 3W Output Power Output to Input Reversed Current Protection 0.85V Low Start-up Voltage VIN range from 0.6V to 4.5V Up to 96% Efficiency 40μA No load IQ and light load PFM Mode Internal Synchronous Rectifier Current Mode control Logic Control Shutdown and Thermal shutdown DFN2x2-6 Package APPLICATIONS USB OTG for MIDs, Smartphones Mobile back-up Battery Chargers Alkaline, NiCd, and NiMh batteries applications USB powered devices ORDERING INFORMATION PART # ETA1035D2G-T PACKAGE PIN DFN2x2-6 TOP MARK DPYW Date Code Product Number TYPICAL APPLICATION 2.2μH 6 1 SW OUT 3 EN 60% 5 IN 4.7μF 80% 2.2nF *needed if Vout>4,5V ETA1035 FB 2 GND 4 VOUT 3.3V/0.8A 6.3V 22μF ŋ VIN 1.8V Efficiency Vs IOUT 100% 40% VIN=3V VIN=2.4V VIN=1.8V VIN=1.2V 20% VOUT=3.3V 0% 0.01 0.1 1 IOUT (A) Outperform with Efficiency www.ETAsolution.com Proprietary Information DO NOT Distribute 1