SE1122 SEAWARD | Alldatasheet
Document overview
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Technical content
Features
¾ 1.3V typical dropout at full load current ¾ Fixed 1.2V ± 2% output voltage ¾ Fast transient response ¾ Output current limiting ¾ Built-in thermal shutdown ¾ Good noise rejection ¾ Rugged 2KV ESD withstand capability. ¾ Available in SOT223 Packages. ¾ RoHS Compliant and 100% Lead (Pb)-Free
Description
SE1122 is a low dropout positive fixed-mode regulator with minimum of 1A output current 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 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
Ordering Information
(Lead-free) Fixed output voltages 1.2V Application ¾ PC peripheral ¾ Communication Typical Application
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 2 Absolute Maximum Rating Symbol Parameter Maximum Units VIN Input Supply Voltage 12 V θJA Thermal Resistance Junction to Ambient (SOT-223) 60 °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 Electrical Characteristic VIN =2.8V, IOUT = 10mA, CIN = 10µF, COUT = 10µF, 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 -- % VLR Load Regulation (1) 10mA ≤ IOUT ≤ 1A -- 0.5 -- % Iq Quiescent Current 1.2 mA VD Dropout Voltage (2) I OUT = 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 T A = 25°C, 10Hz ≤ f ≤ 10kHz -- 0.003 -- %V O 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 T J 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 • Page 3 PSRR 10 100 1000 10000 Frequency (Hz) PSRR (dB) 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)
Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007 • www.seawardinc.com • Page 4 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