Description Features The SE9135 is a low dropout current regulator ¾ No external component required. rated for 350mA constant sink current. The constant ¾ Constant 350mA constant sink current. sink current will ensure that the same amount of ¾ Output short / open circuit protection. power and ¾ Low dropout voltage. consequently maintain the uniform brightness ¾ Low quiescent current at 212uA typical. throughout the possible voltage variations from the ¾ Build-in thermal protection. power source. The IC also features low quiescent ¾ Supply voltage range 2.7V ~ 6V. current and is typically at 212uA. This will minimize ¾ 2KV HBM ESD protection. the power consumption from the IC itself. ¾ Advanced CMOS process. The IC has EN function built-in for applications ¾ SOT-89 and TO-252 package. where EN function or Dim function is needed. ¾ EN function is available upon request. is applied to the power LED Please contact us directly if EN function is required. SE9135 is presently available in low profile SOT-89-3L and TO-252 packages. Application ¾ Power LED Driver. ¾ LED Flashlight Torch. ¾ LED Miner's Lamp. ¾ Lighting. Pin Configuration Application Diagram Revision 7/27/2007 Preliminary and all contents are subject to change without prior notice © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 1 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage VDD -0.3～7V V Output Voltage VOUT -0.3 to 4.6 V Output Sink Current IOUT 400 mA Thermal Resistance, Junction-to-Ambient（SOT89） ΘJA 180 °C/W 260 °C Lead Temperature (Soldering, 5 sec.) Junction Temperature TJ 0 to +150 °C Storage Temperature TS -40 to +150 °C Electrical Characteristics VDD = 3.7V; No Load; TJ = 25°C; unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit Output Sink Current ISINK VOUT=0.2V 315 350 390 mA Load Regulation VOUT=0.2V to 3V 22 mA/V Line Regulation VDD=3V to 6V ，VOUT=0.2V 1.88 mA/V VOUTL 150 mV IDD 212 μA Output Dropout Voltage (2) Supply Current Consumption Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: Output dropout voltage: 90% x IOUT @ VOUT=200mV Thermal Considerations It is important that the thermal limit of the package is not exceeded. The SE9135 has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground. The power dissipation for a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 180°C/W for SE9135. SE9135 is designed to enter thermal protection at 150°C. For example, if TA is 25°C then the maximum PD is limited to about 0.7W. In other words, if IOUT(MAX) = 350mA, then [VIN – VOUT] cannot exceed 2V. Revision 7/27/2007 Preliminary and all contents are subject to change without prior notice © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 2 Outline Drawing for SOT-89-3L DIM SOT-89 A C D J M K E F B L H G I A B C D E F G H I J K L M N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.173 0.181 0.159 0.167 0.067 0.075 0.051 0.059 0.094 0.102 0.035 0.047 0.118REF 0.059REF 4.400 4.600 4.050 4.250 1.700 1.900 1.300 1.500 2.400 2.600 0.890 1.200 3.00REF 1.50REF 0.016 0.020 0.055 0.063 0.014 0.016 10°TYP 0.028REF 0.400 0.520 1.400 1.600 0.350 0.410 10°TYP 0.70REF Outline Drawing for TO252 Revision 7/27/2007 Preliminary and all contents are subject to change without prior notice © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 3 Customer Support Seaward Electronics Incorporated – China Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd Haidian District, Beijing 100085, China Tel: 86-10-28289-5700 Fax: 86-10-8289-5706 Seaward Electronics Incorporated – Taiwan 2F, #181, Sec. 3, Mincyuan 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 - 7/27/2007 Revision 7/27/2007 Preliminary and all contents are subject to change without prior notice © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 4