Description Features SE1122 is a low dropout positive fixed-mode regulator ¾ 1.3V typical dropout at full load current with minimum of 1A output current capability. The ¾ Fixed 1.2V± 2% output voltage product provide ¾ Fast transient response well-regulated supply for low voltage IC applications ¾ Output current limiting such as high-speed bus termination and low current ¾ Built-in thermal shutdown 1.2V logic supply. SE1122 is also well suited for other ¾ Good noise rejection applications is ¾ Rugged 2KV ESD withstand capability. guaranteed to have a typical 1.3V dropout at full load ¾ Available in SOT223 Packages. current making it ideal to provide well-regulated ¾ RoHS Compliant and 100% Lead (Pb)-Free is specifically such as designed VGA cards. to SE1122 outputs of 1.2 output voltage with 2.7V input voltage supply. Pin Configuration Application ¾ PC peripheral ¾ Communication Ordering Information Device SE1122 Package VOUT SOT-223 Fixed output voltages (Lead-free) 1.2V Typical Application Revision 8/3/2007 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 1 Absolute Maximum Rating Symbol Parameter VIN θJA Input Supply Voltage Thermal Resistance Junction to Ambient (SOT-223) TJ Operating Junction Temperature Range TSTG Storage Temperature Range TLEAD Lead Temperature (Soldering 10 Sec) Maximum Units 12 60 V °C/W 0 to 125 °C -40 to 150 °C 260 °C Electrical Characteristic VIN =2.8V, IOUT = 10mA, CIN = 10µF, COUT = 10µF, TA = 25°C, unless otherwise specified. Symbol Parameter VO Output Voltage (1) VSR VLR Test Condition Min Typ Max Units 1.176 1.2 1.224 V Line Regulation (1) 2.8V < VIN < 12V -- 0.3 -- % Load Regulation (1) 10mA ≤ IOUT ≤ 1A -- 0.5 -- % Iq Quiescent Current VD Dropout Voltage (2) ICL 1.2 IOUT = 1A mA -- 1.3 -- V Current Limit 1.1 -- -- A TC Temperature Coefficient -- 0.02 -- %/°C OTP Thermal Protection -- 175 -- °C VN RMS Output Noise TA = 25°C, 10Hz ≤ f ≤ 10kHz -- 0.003 -- %VO RA Ripple Rejection Ratio f = 120Hz, COUT = 22μF (Tantalum), (VIN - VOUT) = 3V, IOUT = 10mA -- 57 -- dB Notes: 1. Low duty cycle pulse testing with which TJ remains unchanged. 3. The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage. It is measured when the output voltage has dropped 2% from the nominal value obtained at VIN = VOUT +Vdropout. Revision 8/3/2007 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 2 PSRR Dropout Voltage VS Output Current 70 60 1.25 PSRR (dB) Dropout Voltage (V) 1.30 1.20 1.15 1.10 50 40 30 20 1.05 10 1.00 0 0 200 400 600 800 1000 1200 Output Current (mA) 10 100 1000 Frequency (Hz) Revision 8/3/2007 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 3 10000 Outline Drawing for SOT-223 Customer Support Seaward Electronics Incorporated – China Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 8/3/2007 Revision 8/3/2007 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 4