SE1122_14 SEAWARD | Alldatasheet
Document overview
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Technical content
Features
1.3V typical dropout 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 &TO252 Packages. Works best with inexpensive electrolytic Capcitors. RoHS Compliant
Description
SE1122 is a low dropout positive fixed-mode regulator with minimum of 1A output curr ent capability. The product is specifically designed to provide 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 su ch 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 inp ut voltage supply. Pin Configuration Tab is Vout GND OUT IN TO252
Ordering Information
(Halogen Free) Fixed output voltages 1.2V SE1122-LF TO252 (Lead free) Application PC peripheral Communication Typical Application
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com.cn • Page 2 Absolute Maximum Rating Symbol Parameter Maximum Units VIN Input Supply Voltage 12 V θJA Thermal Resistance Junction to Ambient (SOT-223) 140 °C/W TJ Operating Junction Temperature Range 0 to 125 °C TSTG Storage Temperature Range -40 to 150 °C TLEAD Lead Temperature (Soldering 10 Sec) 260 °C Note 1: hermal Resistance Junction to Ambient (TO252) is 105 °C/W Electrical Characteristic VIN =2.8V, IOUT = 10mA, CIN = 0.1µ F, COUT = 0.1µ F, TA = 25° C, unless otherwise specified. Symbol Parameter Test Condition Min Typ Max Units VO Output Voltage (1) 1.176 1.2 1.224 V VSR Line Regulation (1) 2.8V < VIN < 12V -- 0.3 -- %/V VLR Load Regulation (1) 10mA ≤ IOUT ≤ 1A -- 0.0005 -- %/mA Iq Quiescent Current 3 5 mA VD Dropout Voltage (2) IOUT = 1A -- 1.3 -- V ICL 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.
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com.cn • Page 3 Dropout Voltage VS Output Current 1.00 1.05 1.10 1.15 1.20 1.25 1.30 0 200 400 600 800 1000 1200 Output Current (mA) Dropout Voltage (V) PSRR 10 100 1000 10000 Frequency (Hz) PSRR (dB) Output Voltage Vs Junction Temperature 1.194 1.196 1.198 1.2 1.202 1.204 1.206 1.208 1.21 1.212 -50 -25 0 25 50 75 100 125 Junction Temperature（C） Output Voltage （V）
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com.cn • Page 4 Outline Drawing for SOT-223 Outline Drawing for TO252
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com.cn • Page 5 Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road 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 - 1/21/2014