ETA1611S2G

ETA1611 2A, 22V Step-Up Regulator DESCRIPTION FEATURES The ETA1611 is a high efficiency step-up converter with an internally integrated 22V power MOSEFT. It runs with an optimal 1MHz frequency that enables the use of small external components while still providing the best efficiency. It can drive up to 2A output current. The incorporated true PWM-Diming feature through EN pin enable one further digitally program the output voltage lower. For maximum protection, the ETA1611 has an OVP protection feature that prevents the output voltage exceeding the maximum rating of the ETA1611 and the output cap during open conditions.       Up to 95% Efficiency 22V OVP protection True PWM Brightness Control 200mV Feedback Voltage 2.8A current limit SOT23-6 Package APPLICATIONS      ETA1611 is available in a space-saving SOT23-6  package.  Portable power bank Powering 3G module Large LCD display backlight driving up to 90 LEDs Satellite STB Bluetooth Speaker Large TFT screen bias Other application which needs high voltage and high current generation TYPICAL APPLICATION VIN 2.7V to 6V 10μH VOUT = 0.2V*(1+R1/R2) 10μF 1 5 IN 4.7μF OFF SW ETA1611 ON 4 Or up to 90 LEDs FB R1 3 EN R2 G 2 ORDERING INFORMATION www.ETAsolution.com PART No. PACKAGE TOP MARK Pcs/Reel ETA1611S2G SOT23-6 GVYW 3000 Powering Minds of the Smarts Proprietary Information DO NOT Distribute 1 ETA1611 PIN CONFIGURATION SW 1 GND 2 ETA1611 FB 3 ABSOLUTE MAXIMUM RATINGS (Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.) 6 NC 5 IN 4 EN SW Voltage............................................ –0.3V to 25V All Other PIN Voltages………………..–0.3V to 6.5V SW to ground current …………........Internally limited Junction Temperature ...................................... 150°C Storage Temperature Range …..….–55°C to 150°C Thermal Resistance θJA θJC SOT23-6…………………....134……50 ...........oC/W SOT23-6 Recommended Operating Conditions (Note: The device is not guaranteed to function outside its operating conditions.) Ambient Temperature Range .............–40°C to 85°C Junction Temperature Range …......–40°C to 125°C ELECTRICAL CHARACTERISTICS (VIN = 3.6V, unless otherwise specified. Typical values are at TA = 25oC.) PARAMETER Input Voltage Range Input UVLO UVLO HYS FB Feedback Voltage FB Input Current Quiescent Current at IN Shutdown Supply Current at IN Switching Frequency Maximum Duty Cycle NMOS Switch On Resistance NMOS Switch Current Limit SW Leakage Current EN Input Low Voltage EN Input High Voltage Thermal Shutdown CONDITIONS Rising MIN 2.7 2.00 VIN = VEN =3.6V 194 Switching at Iout=0 No Switching VEN=GND VIN2500 Sunlord Schottky Diode Selection A high-speed rectifying Schottky is recommended for ETA1611 for maximum efficiency due to its high switching frequency. The diode average and peak current rating must be larger than the average output current and peak inductor current to ensure reliability. In addition, the diode’s reverse breakdown voltage must exceed the open LED protection voltage. Input and Output Capacitor Selection The output capacitor is mainly selected to meet the requirements for the output ripple and loop stability. The output requires a capacitor in the range of 10μF to 22μF. BLOCK DIAGRAM EN IN UVLO & Thermal shutdown REF + EA + - Σ - FB PWM Logic SW DRIVER OSC Slope Comp GND Powering Minds of the Smarts www.ETAsolution.com Proprietary Information DO NOT Distribute 6 ETA1611 PACKAGE OUTLINE Powering Minds of the Smarts www.ETAsolution.com Proprietary Information DO NOT Distribute 7