SE1122

Description SE1122 is a low dropout positive fixed-mode regulator with minimum of 1A output current capability. The product is specifically designed to provide Features 1.3V typical dropout at full load current Fixed 1.2V± 2% output voltage Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection Rugged 2KV ESD withstand capability. Available in SOT223 Packages. RoHS Compliant and 100% Lead (Pb)-Free well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 1.2V logic supply. SE1122 is also well suited for other applications such as VGA cards. SE1122 is guaranteed to have a typical 1.3V dropout at full load current making it ideal to provide well-regulated outputs of 1.2 output voltage with 2.7V input voltage supply. Pin Configuration Application PC peripheral Communication Ordering Information Device Package SOT-223 (Lead-free) VOUT Fixed output voltages 1.2V SE1122 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 VIN θJA TJ TSTG TLEAD Parameter Input Supply Voltage Thermal Resistance Junction to Ambient (SOT-223) Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 Sec) Maximum 12 60 0 to 125 -40 to 150 260 Units V °C/W °C °C °C Electrical Characteristic VIN =2.8V, IOUT = 10mA, CIN = 10µF, COUT = 10µF, TA = 25°C, unless otherwise specified. Symbol VO VSR VLR Iq VD ICL TC OTP VN RA 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. Parameter Output Voltage (1) Line Regulation Load Regulation Dropout Voltage Current Limit Temperature Coefficient Thermal Protection RMS Output Noise Ripple Rejection Ratio TA = 25°C, 10Hz ≤ f ≤ 10kHz f = 120Hz, COUT = 22μF (Tantalum), (VIN - VOUT) = 3V, IOUT = 10mA (1) (1) Test Condition Min 1.176 Typ 1.2 0.3 0.5 1.2 1.3 -0.02 175 0.003 57 Max 1.224 --------- Units V % % mA V A %/°C °C %VO dB 2.8V < VIN < 12V 10mA ≤ IOUT ≤ 1A IOUT = 1A ---1.1 ----- Quiescent Current (2) Revision 8/3/2007 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 2 Dropout Voltage VS Output Current 1.30 Dropout Voltage (V) 1.25 1.20 1.15 1.10 1.05 1.00 0 200 400 600 800 1000 1200 PSRR 70 60 PSRR (dB) 50 40 30 20 10 0 10 100 1000 10000 Output Current (mA) 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 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