EUP2621 Datasheet | Eutech Microelectronics

EUP2621 620k Hz/1.25MHz Step-up DC/DC Converter DESCRIPTION The EUP2621 is a high performance current mode, PWM step-up converter with pin selectable operating frequency. With an internal 1.6A, 200m£[ MOSFET, it can generate 12V at up to 400m A output current from a 5V supply. The selectable 620k Hz and 1.25MHz allows smaller inductors and faster transient response. An external pensation pin gives the user greater flexibility in setting loop pensation allowing the use of low ESR Ceramic output capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during start-up. When shut down, it draws¡Õ 10µA of current and can operate down to 2.5V input supply. These Features along with 1.25MHz switching frequency makes it an ideal device for portable equipment and TFT-LCD displays. The EUP2621 is available in an 8-pin MSOP package. The device is specified for operation over the full -40°C to +85°C temperature range. Features z z z z z z z z z 90% Efficiency 1.6A, 200mΩ Power MOSFET 2.5V to 5.5V Input Range Adjustable Output Voltage up to 18V 620k Hz/1.25MHz Switching Frequency Selection Adjustable Soft-Start Internal Thermal Protection Small MSOP-8 package Ro HS pliant and 100% Lead (Pb)-Free APPLICATIONS z z z z z z TFT-LCD Displays DSL Modems Set-Top Boxes PCMCIA Cards Portable Equipment Handheld Devices Typical Application Circuit VÛm w`R - yÑb € ww w.g ofot ech. Figure 1. 5V to 12V Step-Up DS2621 Ver 1.0 July .2006 N~- NãtÿmñW3^VÛmw`R- yÑb€g- PQl Sø Tel: 0755-8398 3377 / 135 9011 2223 http://.gofotech. Figure 2. Triple Output TFT LCD Power Supply Pin Configurations Part Number VÛm w`R - yÑb € Pin Configurations EUP2621 MSOP-8 ww w.g ofot ech. Pin Description PIN P FB PIN 1 2 DESCRIPTION pensation pin. Output of the internal error amplifier. Capacitor and resistor from P pin to ground. Voltage feedback pin. Internal reference is 1.24V NOMINAL. Connect a resistor...