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| 500mA CMOS LDO Voltage Regulator (Preliminary) Description The SE5218 series of fixed output low dropout linear regulators are designed for portable battery powered applications, which require low noise environment, fast enable response time, and low dropout voltage. Each device contains a bandgap voltage reference, an error amplifier, a PMOS power transistor, and resistors for setting output voltage, and current limit and temperature limit protection circuits. The SE5218 has been designed to be used with low cost capacitors and requires a minimum output capacitor of 1.0F. Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3V. SE5218 Features Typical 175mV Dropout Voltage at 150mA. Fast Enable Turn-On Time of 20s (Typ.) Excellent Line and Load Regulation. High Accuracy Output Voltage of 2%. Ultra-Low Ground Current at 65A (Typ.) Disable Current Less than 0.3A (Typ.) Thermal Protection. Standard SOT-23-5L Packages. Applications USB removable devices MPEG4 devices Wireless LAN's Hand-Held Instrumentation. Portable DVD players Digital camera Pin Configuration Application Diagram Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 1 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Ordering/Marking Information Package Ordering Information 3.3V 2.8V 2.5V 1.8V 1.5V 3.0V SE5218ALG-LF SE5218BLG-LF SE5218CLG-LF SE5218DLG-LF SE5218ELG-LF SE5218FLG-LF 218Alz 218BLz 218CLz 218DLz 218ELz 218FLz Marking Information Starting with 5, a bar on top of 5 is for production year 2001, and underlined 5 is for year 2002. The next character is marked on top for 2003, and underlined for 2004. The naming pattern continues with consecutive characters for later years. The last character is the week code. (A-Z: 1-26, a-z: 27-52) A dot on top right corner is for lead-free process. Absolute Maximum Rating (1) Parameter Input Voltage Enable Voltage Power Dissipation Output Short Circuit Duration Thermal Resistance, Junction-to-Ambient Lead Temperature (Soldering, 5 sec.) Junction Temperature Storage Temperature TJ TS JA Symbol VIN VEN PD Value 6 -0.3 to VIN Internally Limited (3) Infinite 230 (SOT-23-5L) 260 +150 -40 to +150 C/W C C C Units V V Operating Rating (2) Parameter Supply Input Voltage Junction Temperature Symbol VIN TJ Value +2.8V to +5.5 0 to +125 Units V C Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 2 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Electrical Characteristics VIN =5V; VEN=VIN; CIN = 2.2F; COUT = 2.2FElectrolytic capacitor; IOUT = 10mA; TJ = 25C; unless otherwise specified. Min 1.470 1.764 2.450 2.744 2.940 3.234 ---Typ 1.5 1.8 2.5 2.8 3.0 3.3 1.0 1.0 1.5 Max 1.530 1.836 2.550 2.856 3.060 3.366 --% -Unit Symbol Parameter VOUT Output Voltage Accuracy Conditions SE5218 - 1.5(VIN=3.3V) SE5218 - 1.8(VIN=3.3V) SE5218 - 2.5 SE5218 - 2.8 SE5218 - 3.0 SE5218 - 3.3 VIN = (VOUT+1)V to 5.5V VIN = (VOUT+0.8)V or 2.5V IOUT = 10mA to 250mA IOUT = 10mA to 500mA V VOUT Line Regulation Load Regulation (5) Output Voltage Temperature Coefficient Dropout Voltage (6) Thermal Protection Ripple Rejection Quiescent Current Enable Input Threshold Voltage Current Limit %/V VOUT VOUT/T Note 4 IOUT = 10mA IOUT = 150mA IOUT = 250mA IOUT = 400mA Thermal Protection Temperature Protection Hysterisys f = 120 Hz VEN = 0.4V VEN = VIN Voltage Increasing, Output Turns On, Logic High Voltage Decreasing, Output Turns Off, Logic Low -- 0.025 15 175 320 600 -- mV/C VIN - VOUT mV TPROTECTION PSRR IQ -----1.6 --- 150 20 59 0.3 65 --800 ------- C dB A VTH(EN) V 0.4 -mA ILIMIT Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 3 500mA CMOS LDO Voltage Regulator (Preliminary) Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. SE5218 Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) - TA)/JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and See "Thermal Consideration" section for details the regulator will go into thermal shutdown. Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 10mA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 7: The Cin or Cout should be chosen carefully. Please refer to the Application Hints Block Diagram Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 4 500mA CMOS LDO Voltage Regulator (Preliminary) Line R egulation (VOUT = 3.3V) (VIN = 4.3V to 6V, IOUT = 10mA) SE5218 Load R egulation (VOUT = 3.3V) (VIN = 5V, IOUT = 10mA to 500mA) 3.6000 3.600 3.500 3.400 VOUT (V) 3.5000 3.4000 VOUT (V) 3.3000 3.300 3.200 3.100 3.000 3.2000 3.1000 3.0000 4.2 4.7 5.2 VIN (V) 5.7 0 100 200 IOUT (mA) 300 400 500 Output Voltage vs Temperature (VIN = 5V, IOUT = 10mA) IQ vs IOUT (VIN = 5V, IO UT = 10mA to 500mA) 3.330 3.320 3.310 VOUT (V) 160 140 120 100 3.300 3.290 3.280 IQ (uA ) 80 60 40 20 3.270 0 20 40 60 Temperature (C ) 80 100 120 0 0 100 200 300 IOUT (mA ) 400 500 P S R R (VOUT = 3.3) (VIN = 5V, VP P = 1V) Transient Response (VOUT = 3.3V) (IOUT = 10mA to 40mA) 70 60 50 P S R R (dB) 40 30 20 10 0 100 1000 10000 Frequency (Hz) Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 5 500mA CMOS LDO Voltage Regulator (Preliminary) Application Hints Like any low dropout regulator, SE5218 requires external capacitors to ensure stability. ensure performance. The external capacitors must be carefully selected to SE5218 Thermal Considerations It is important that the thermal limit of the package is not exceeded. thermal protection. The SE5218 has built-in 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] It The thermal limit of the package is then limited to PD(MAX) = [TJ - TA]/JA where TJ is the junction temperature, TA is the ambient temperature, and JA for SOT-23-5L is around 230C/W for SE5218. SE5218 is designed to enter thermal protection at 150C. For example, if TA is 25C then the maximum PD is limited to about 0.6W. In other words, if IOUT(MAX) = 400mA, then [VIN - VOUT] cannot exceed 1.5V. Input Capacitor An input capacitor of at least 1F is required. The inexpensive Electrolytic capacitor is preferred. The value can be increased without upper limit. Output Capacitor An output capacitor is required for stability. must be placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. The inexpensive Electrolytic capacitor is recommended. The minimum value is 1F but may be increased without limit. Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 6 500mA CMOS LDO Voltage Regulator (Preliminary) Outline Drawing SOT-23-5L K B H D SE5218 DIM A B C D E F H J K N DIM ENSIONS INCHES M M M IN MAX MIN MAX 0.110 0.059 0.036 0.014 0.0035 0.102 0.120 0.070 0.051 0.020 0.037 0.075 0.006 0.008 0.118 2.80 1.50 0.90 0.35 0.090 2.60 3.05 1.75 1.30 0.50 0.95 1.90 0.15 0.20 3.00 A F E C J 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 - 12/5/2008 Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2005. * www.seawardinc.com.cn * Page 7 |
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